https://www.nlnetlabs.nl/downloads/unbound/CVE-2022-3204.txt

FEDORA-2022-1326d2815c

FEDORA-2022-164cf7837e

FEDORA-2022-204ee3da84

GLSA-202212-02

[debian-lts-announce] 20230329 [SECURITY] [DLA 3371-1] unbound security update

According to the versions of the unbound packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - A vulnerability named 'Non-Responsive Delegation Attack' (NRDelegation Attack) has been discovered in     various DNS resolving software. The NRDelegation Attack works by having a malicious delegation with a     considerable number of non responsive nameservers. The attack starts by querying a resolver for a record     that relies on those unresponsive nameservers. The attack can cause a resolver to spend a lot of     time/resources resolving records under a malicious delegation point where a considerable number of     unresponsive NS records reside. It can trigger high CPU usage in some resolver implementations that     continually look in the cache for resolved NS records in that delegation. This can lead to degraded     performance and eventually denial of service in orchestrated attacks. Unbound does not suffer from high     CPU usage, but resources are still needed for resolving the malicious delegation. Unbound will keep trying     to resolve the record until hard limits are reached. Based on the nature of the attack and the replies,     different limits could be reached. From version 1.16.3 on, Unbound introduces fixes for better performance     when under load, by cutting opportunistic queries for nameserver discovery and DNSKEY prefetching and     limiting the number of times a delegation point can issue a cache lookup for missing records.
    (CVE-2022-3204)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote Oracle Linux 8 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2023-2771 advisory.

  - A vulnerability named 'Non-Responsive Delegation Attack' (NRDelegation Attack) has been discovered in     various DNS resolving software. The NRDelegation Attack works by having a malicious delegation with a     considerable number of non responsive nameservers. The attack starts by querying a resolver for a record     that relies on those unresponsive nameservers. The attack can cause a resolver to spend a lot of     time/resources resolving records under a malicious delegation point where a considerable number of     unresponsive NS records reside. It can trigger high CPU usage in some resolver implementations that     continually look in the cache for resolved NS records in that delegation. This can lead to degraded     performance and eventually denial of service in orchestrated attacks. Unbound does not suffer from high     CPU usage, but resources are still needed for resolving the malicious delegation. Unbound will keep trying     to resolve the record until hard limits are reached. Based on the nature of the attack and the replies,     different limits could be reached. From version 1.16.3 on, Unbound introduces fixes for better performance     when under load, by cutting opportunistic queries for nameserver discovery and DNSKEY prefetching and     limiting the number of times a delegation point can issue a cache lookup for missing records.
    (CVE-2022-3204)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote AlmaLinux 8 host has packages installed that are affected by a vulnerability as referenced in the ALSA-2023:2771 advisory.

  - A vulnerability named 'Non-Responsive Delegation Attack' (NRDelegation Attack) has been discovered in     various DNS resolving software. The NRDelegation Attack works by having a malicious delegation with a     considerable number of non responsive nameservers. The attack starts by querying a resolver for a record     that relies on those unresponsive nameservers. The attack can cause a resolver to spend a lot of     time/resources resolving records under a malicious delegation point where a considerable number of     unresponsive NS records reside. It can trigger high CPU usage in some resolver implementations that     continually look in the cache for resolved NS records in that delegation. This can lead to degraded     performance and eventually denial of service in orchestrated attacks. Unbound does not suffer from high     CPU usage, but resources are still needed for resolving the malicious delegation. Unbound will keep trying     to resolve the record until hard limits are reached. Based on the nature of the attack and the replies,     different limits could be reached. From version 1.16.3 on, Unbound introduces fixes for better performance     when under load, by cutting opportunistic queries for nameserver discovery and DNSKEY prefetching and     limiting the number of times a delegation point can issue a cache lookup for missing records.
    (CVE-2022-3204)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote CentOS Linux 8 host has packages installed that are affected by a vulnerability as referenced in the CESA-2023:2771 advisory.

  - A vulnerability named 'Non-Responsive Delegation Attack' (NRDelegation Attack) has been discovered in     various DNS resolving software. The NRDelegation Attack works by having a malicious delegation with a     considerable number of non responsive nameservers. The attack starts by querying a resolver for a record     that relies on those unresponsive nameservers. The attack can cause a resolver to spend a lot of     time/resources resolving records under a malicious delegation point where a considerable number of     unresponsive NS records reside. It can trigger high CPU usage in some resolver implementations that     continually look in the cache for resolved NS records in that delegation. This can lead to degraded     performance and eventually denial of service in orchestrated attacks. Unbound does not suffer from high     CPU usage, but resources are still needed for resolving the malicious delegation. Unbound will keep trying     to resolve the record until hard limits are reached. Based on the nature of the attack and the replies,     different limits could be reached. From version 1.16.3 on, Unbound introduces fixes for better performance     when under load, by cutting opportunistic queries for nameserver discovery and DNSKEY prefetching and     limiting the number of times a delegation point can issue a cache lookup for missing records.
    (CVE-2022-3204)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2023:2771 advisory.

  - A vulnerability named 'Non-Responsive Delegation Attack' (NRDelegation Attack) has been discovered in     various DNS resolving software. The NRDelegation Attack works by having a malicious delegation with a     considerable number of non responsive nameservers. The attack starts by querying a resolver for a record     that relies on those unresponsive nameservers. The attack can cause a resolver to spend a lot of     time/resources resolving records under a malicious delegation point where a considerable number of     unresponsive NS records reside. It can trigger high CPU usage in some resolver implementations that     continually look in the cache for resolved NS records in that delegation. This can lead to degraded     performance and eventually denial of service in orchestrated attacks. Unbound does not suffer from high     CPU usage, but resources are still needed for resolving the malicious delegation. Unbound will keep trying     to resolve the record until hard limits are reached. Based on the nature of the attack and the replies,     different limits could be reached. From version 1.16.3 on, Unbound introduces fixes for better performance     when under load, by cutting opportunistic queries for nameserver discovery and DNSKEY prefetching and     limiting the number of times a delegation point can issue a cache lookup for missing records.
    (CVE-2022-3204)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 9 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2023-2370 advisory.

  - A vulnerability named 'Non-Responsive Delegation Attack' (NRDelegation Attack) has been discovered in     various DNS resolving software. The NRDelegation Attack works by having a malicious delegation with a     considerable number of non responsive nameservers. The attack starts by querying a resolver for a record     that relies on those unresponsive nameservers. The attack can cause a resolver to spend a lot of     time/resources resolving records under a malicious delegation point where a considerable number of     unresponsive NS records reside. It can trigger high CPU usage in some resolver implementations that     continually look in the cache for resolved NS records in that delegation. This can lead to degraded     performance and eventually denial of service in orchestrated attacks. Unbound does not suffer from high     CPU usage, but resources are still needed for resolving the malicious delegation. Unbound will keep trying     to resolve the record until hard limits are reached. Based on the nature of the attack and the replies,     different limits could be reached. From version 1.16.3 on, Unbound introduces fixes for better performance     when under load, by cutting opportunistic queries for nameserver discovery and DNSKEY prefetching and     limiting the number of times a delegation point can issue a cache lookup for missing records.
    (CVE-2022-3204)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote AlmaLinux 9 host has packages installed that are affected by a vulnerability as referenced in the ALSA-2023:2370 advisory.

  - A vulnerability named 'Non-Responsive Delegation Attack' (NRDelegation Attack) has been discovered in     various DNS resolving software. The NRDelegation Attack works by having a malicious delegation with a     considerable number of non responsive nameservers. The attack starts by querying a resolver for a record     that relies on those unresponsive nameservers. The attack can cause a resolver to spend a lot of     time/resources resolving records under a malicious delegation point where a considerable number of     unresponsive NS records reside. It can trigger high CPU usage in some resolver implementations that     continually look in the cache for resolved NS records in that delegation. This can lead to degraded     performance and eventually denial of service in orchestrated attacks. Unbound does not suffer from high     CPU usage, but resources are still needed for resolving the malicious delegation. Unbound will keep trying     to resolve the record until hard limits are reached. Based on the nature of the attack and the replies,     different limits could be reached. From version 1.16.3 on, Unbound introduces fixes for better performance     when under load, by cutting opportunistic queries for nameserver discovery and DNSKEY prefetching and     limiting the number of times a delegation point can issue a cache lookup for missing records.
    (CVE-2022-3204)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2023:2370 advisory.

  - A vulnerability named 'Non-Responsive Delegation Attack' (NRDelegation Attack) has been discovered in     various DNS resolving software. The NRDelegation Attack works by having a malicious delegation with a     considerable number of non responsive nameservers. The attack starts by querying a resolver for a record     that relies on those unresponsive nameservers. The attack can cause a resolver to spend a lot of     time/resources resolving records under a malicious delegation point where a considerable number of     unresponsive NS records reside. It can trigger high CPU usage in some resolver implementations that     continually look in the cache for resolved NS records in that delegation. This can lead to degraded     performance and eventually denial of service in orchestrated attacks. Unbound does not suffer from high     CPU usage, but resources are still needed for resolving the malicious delegation. Unbound will keep trying     to resolve the record until hard limits are reached. Based on the nature of the attack and the replies,     different limits could be reached. From version 1.16.3 on, Unbound introduces fixes for better performance     when under load, by cutting opportunistic queries for nameserver discovery and DNSKEY prefetching and     limiting the number of times a delegation point can issue a cache lookup for missing records.
    (CVE-2022-3204)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

According to the versions of the unbound package installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - A vulnerability named 'Non-Responsive Delegation Attack' (NRDelegation Attack) has been discovered in     various DNS resolving software. The NRDelegation Attack works by having a malicious delegation with a     considerable number of non responsive nameservers. The attack starts by querying a resolver for a record     that relies on those unresponsive nameservers. The attack can cause a resolver to spend a lot of     time/resources resolving records under a malicious delegation point where a considerable number of     unresponsive NS records reside. It can trigger high CPU usage in some resolver implementations that     continually look in the cache for resolved NS records in that delegation. This can lead to degraded     performance and eventually denial of service in orchestrated attacks. Unbound does not suffer from high     CPU usage, but resources are still needed for resolving the malicious delegation. Unbound will keep trying     to resolve the record until hard limits are reached. Based on the nature of the attack and the replies,     different limits could be reached. From version 1.16.3 on, Unbound introduces fixes for better performance     when under load, by cutting opportunistic queries for nameserver discovery and DNSKEY prefetching and     limiting the number of times a delegation point can issue a cache lookup for missing records.
    (CVE-2022-3204)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The version of unbound installed on the remote CBL Mariner 2.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2022-3204 advisory.

  - A vulnerability named 'Non-Responsive Delegation Attack' (NRDelegation Attack) has been discovered in     various DNS resolving software. The NRDelegation Attack works by having a malicious delegation with a     considerable number of non responsive nameservers. The attack starts by querying a resolver for a record     that relies on those unresponsive nameservers. The attack can cause a resolver to spend a lot of     time/resources resolving records under a malicious delegation point where a considerable number of     unresponsive NS records reside. It can trigger high CPU usage in some resolver implementations that     continually look in the cache for resolved NS records in that delegation. This can lead to degraded     performance and eventually denial of service in orchestrated attacks. Unbound does not suffer from high     CPU usage, but resources are still needed for resolving the malicious delegation. Unbound will keep trying     to resolve the record until hard limits are reached. Based on the nature of the attack and the replies,     different limits could be reached. From version 1.16.3 on, Unbound introduces fixes for better performance     when under load, by cutting opportunistic queries for nameserver discovery and DNSKEY prefetching and     limiting the number of times a delegation point can issue a cache lookup for missing records.
    (CVE-2022-3204)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2023-078 advisory.

  - NLnet Labs Unbound, up to and including version 1.16.1 is vulnerable to a novel type of the ghost domain     names attack. The vulnerability works by targeting an Unbound instance. Unbound is queried for a     subdomain of a rogue domain name. The rogue nameserver returns delegation information for the subdomain     that updates Unbound's delegation cache. This action can be repeated before expiry of the delegation     information by querying Unbound for a second level subdomain which the rogue nameserver provides new     delegation information. Since Unbound is a child-centric resolver, the ever-updating child delegation     information can keep a rogue domain name resolvable long after revocation. From version 1.16.2 on, Unbound     checks the validity of parent delegation records before using cached delegation information.
    (CVE-2022-30698)

  - NLnet Labs Unbound, up to and including version 1.16.1, is vulnerable to a novel type of the ghost domain     names attack. The vulnerability works by targeting an Unbound instance. Unbound is queried for a rogue     domain name when the cached delegation information is about to expire. The rogue nameserver delays the     response so that the cached delegation information is expired. Upon receiving the delayed answer     containing the delegation information, Unbound overwrites the now expired entries. This action can be     repeated when the delegation information is about to expire making the rogue delegation information ever-     updating. From version 1.16.2 on, Unbound stores the start time for a query and uses that to decide if the     cached delegation information can be overwritten. (CVE-2022-30699)

  - A vulnerability named 'Non-Responsive Delegation Attack' (NRDelegation Attack) has been discovered in     various DNS resolving software. The NRDelegation Attack works by having a malicious delegation with a     considerable number of non responsive nameservers. The attack starts by querying a resolver for a record     that relies on those unresponsive nameservers. The attack can cause a resolver to spend a lot of     time/resources resolving records under a malicious delegation point where a considerable number of     unresponsive NS records reside. It can trigger high CPU usage in some resolver implementations that     continually look in the cache for resolved NS records in that delegation. This can lead to degraded     performance and eventually denial of service in orchestrated attacks. Unbound does not suffer from high     CPU usage, but resources are still needed for resolving the malicious delegation. Unbound will keep trying     to resolve the record until hard limits are reached. Based on the nature of the attack and the replies,     different limits could be reached. From version 1.16.3 on, Unbound introduces fixes for better performance     when under load, by cutting opportunistic queries for nameserver discovery and DNSKEY prefetching and     limiting the number of times a delegation point can issue a cache lookup for missing records.
    (CVE-2022-3204)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

According to the versions of the unbound packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - A vulnerability named 'Non-Responsive Delegation Attack' (NRDelegation Attack) has been discovered in     various DNS resolving software. The NRDelegation Attack works by having a malicious delegation with a     considerable number of non responsive nameservers. The attack starts by querying a resolver for a record     that relies on those unresponsive nameservers. The attack can cause a resolver to spend a lot of     time/resources resolving records under a malicious delegation point where a considerable number of     unresponsive NS records reside. It can trigger high CPU usage in some resolver implementations that     continually look in the cache for resolved NS records in that delegation. This can lead to degraded     performance and eventually denial of service in orchestrated attacks. Unbound does not suffer from high     CPU usage, but resources are still needed for resolving the malicious delegation. Unbound will keep trying     to resolve the record until hard limits are reached. Based on the nature of the attack and the replies,     different limits could be reached. From version 1.16.3 on, Unbound introduces fixes for better performance     when under load, by cutting opportunistic queries for nameserver discovery and DNSKEY prefetching and     limiting the number of times a delegation point can issue a cache lookup for missing records.
    (CVE-2022-3204)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2022-2023-265 advisory.

  - NLnet Labs Unbound, up to and including version 1.16.1 is vulnerable to a novel type of the ghost domain     names attack. The vulnerability works by targeting an Unbound instance. Unbound is queried for a     subdomain of a rogue domain name. The rogue nameserver returns delegation information for the subdomain     that updates Unbound's delegation cache. This action can be repeated before expiry of the delegation     information by querying Unbound for a second level subdomain which the rogue nameserver provides new     delegation information. Since Unbound is a child-centric resolver, the ever-updating child delegation     information can keep a rogue domain name resolvable long after revocation. From version 1.16.2 on, Unbound     checks the validity of parent delegation records before using cached delegation information.
    (CVE-2022-30698)

  - NLnet Labs Unbound, up to and including version 1.16.1, is vulnerable to a novel type of the ghost domain     names attack. The vulnerability works by targeting an Unbound instance. Unbound is queried for a rogue     domain name when the cached delegation information is about to expire. The rogue nameserver delays the     response so that the cached delegation information is expired. Upon receiving the delayed answer     containing the delegation information, Unbound overwrites the now expired entries. This action can be     repeated when the delegation information is about to expire making the rogue delegation information ever-     updating. From version 1.16.2 on, Unbound stores the start time for a query and uses that to decide if the     cached delegation information can be overwritten. (CVE-2022-30699)

  - A vulnerability named 'Non-Responsive Delegation Attack' (NRDelegation Attack) has been discovered in     various DNS resolving software. The NRDelegation Attack works by having a malicious delegation with a     considerable number of non responsive nameservers. The attack starts by querying a resolver for a record     that relies on those unresponsive nameservers. The attack can cause a resolver to spend a lot of     time/resources resolving records under a malicious delegation point where a considerable number of     unresponsive NS records reside. It can trigger high CPU usage in some resolver implementations that     continually look in the cache for resolved NS records in that delegation. This can lead to degraded     performance and eventually denial of service in orchestrated attacks. Unbound does not suffer from high     CPU usage, but resources are still needed for resolving the malicious delegation. Unbound will keep trying     to resolve the record until hard limits are reached. Based on the nature of the attack and the replies,     different limits could be reached. From version 1.16.3 on, Unbound introduces fixes for better performance     when under load, by cutting opportunistic queries for nameserver discovery and DNSKEY prefetching and     limiting the number of times a delegation point can issue a cache lookup for missing records.
    (CVE-2022-3204)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

This Solaris system is missing necessary patches to address critical security updates :

  - Vulnerability in the Oracle Communications Session     Border Controller product of Oracle Communications     (component: Routing (glibc)). Supported versions that     are affected are 8.4, 9.0 and 9.1. Difficult to exploit     vulnerability allows unauthenticated attacker with     network access via HTTP to compromise Oracle     Communications Session Border Controller. Successful     attacks of this vulnerability can result in unauthorized     ability to cause a hang or frequently repeatable crash     (complete DOS) of Oracle Communications Session Border     Controller as well as unauthorized update, insert or     delete access to some of Oracle Communications Session     Border Controller accessible data and unauthorized read     access to a subset of Oracle Communications Session     Border Controller accessible data. CVSS 3.1 Base Score     7.0 (Confidentiality, Integrity and Availability     impacts). CVSS Vector:
    (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H).
    (CVE-2022-23219)

  - Vulnerability in the Oracle Communications Cloud Native     Core Unified Data Repository product of Oracle     Communications (component: Signaling (glibc)). The     supported version that is affected is 22.1.1. Easily     exploitable vulnerability allows unauthenticated     attacker with network access via HTTP to compromise     Oracle Communications Cloud Native Core Unified Data     Repository. Successful attacks of this vulnerability can     result in takeover of Oracle Communications Cloud Native     Core Unified Data Repository. CVSS 3.1 Base Score 9.8     (Confidentiality, Integrity and Availability impacts).
    CVSS Vector:
    (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
    (CVE-2022-23218)

  - Vulnerability in the Oracle Communications Cloud Native     Core Policy product of Oracle Communications (component:
    Policy (GNU Libtasn1)). Supported versions that are     affected are 22.4.0-22.4.4 and 23.1.0-23.1.1. Easily     exploitable vulnerability allows unauthenticated     attacker with network access via HTTPS to compromise     Oracle Communications Cloud Native Core Policy.
    Successful attacks of this vulnerability can result in     unauthorized access to critical data or complete access     to all Oracle Communications Cloud Native Core Policy     accessible data and unauthorized ability to cause a hang     or frequently repeatable crash (complete DOS) of Oracle     Communications Cloud Native Core Policy. CVSS 3.1 Base     Score 9.1 (Confidentiality and Availability impacts).
    CVSS Vector:
    (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H).
    (CVE-2021-46848)

  - Vulnerability in the Oracle Outside In Technology     product of Oracle Fusion Middleware (component:
    DC-Specific Component (LibExpat)). The supported version     that is affected is 8.5.6. Easily exploitable     vulnerability allows unauthenticated attacker with     network access via HTTP to compromise Oracle Outside In     Technology. Successful attacks of this vulnerability can     result in unauthorized ability to cause a hang or     frequently repeatable crash (complete DOS) of Oracle     Outside In Technology. CVSS 3.1 Base Score 7.5     (Availability impacts). CVSS Vector:
    (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
    (CVE-2022-43680)

  - Vulnerability in the Oracle Database OML4PY (Python)     component of Oracle Database Server. The supported     version that is affected is 21c. Easily exploitable     vulnerability allows low privileged attacker having     Authenticated User privilege with network access via     HTTP to compromise Oracle Database OML4PY (Python).
    Successful attacks of this vulnerability can result in     unauthorized ability to cause a partial denial of     service (partial DOS) of Oracle Database OML4PY     (Python). CVSS 3.1 Base Score 4.3 (Availability     impacts). CVSS Vector:
    (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L).
    (CVE-2022-45061)

  - Vulnerability in the Oracle Solaris product of Oracle     Systems (component: NSSwitch). Supported versions that     are affected are 10 and 11. Difficult to exploit     vulnerability allows high privileged attacker with     network access via multiple protocols to compromise     Oracle Solaris. Successful attacks require human     interaction from a person other than the attacker and     while the vulnerability is in Oracle Solaris, attacks     may significantly impact additional products (scope     change). Successful attacks of this vulnerability can     result in unauthorized update, insert or delete access     to some of Oracle Solaris accessible data and     unauthorized ability to cause a partial denial of     service (partial DOS) of Oracle Solaris. CVSS 3.1 Base     Score 4.0 (Integrity and Availability impacts). CVSS     Vector: (CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:N/I:L/A:L).
    (CVE-2023-21900)

According to the versions of the unbound packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - NLnet Labs Unbound, up to and including version 1.16.1 is vulnerable to a novel type of the 'ghost domain     names' attack. The vulnerability works by targeting an Unbound instance. Unbound is queried for a     subdomain of a rogue domain name. The rogue nameserver returns delegation information for the subdomain     that updates Unbound's delegation cache. This action can be repeated before expiry of the delegation     information by querying Unbound for a second level subdomain which the rogue nameserver provides new     delegation information. Since Unbound is a child-centric resolver, the ever-updating child delegation     information can keep a rogue domain name resolvable long after revocation. From version 1.16.2 on, Unbound     checks the validity of parent delegation records before using cached delegation information.
    (CVE-2022-30698)

  - NLnet Labs Unbound, up to and including version 1.16.1, is vulnerable to a novel type of the 'ghost domain     names' attack. The vulnerability works by targeting an Unbound instance. Unbound is queried for a rogue     domain name when the cached delegation information is about to expire. The rogue nameserver delays the     response so that the cached delegation information is expired. Upon receiving the delayed answer     containing the delegation information, Unbound overwrites the now expired entries. This action can be     repeated when the delegation information is about to expire making the rogue delegation information ever-     updating. From version 1.16.2 on, Unbound stores the start time for a query and uses that to decide if the     cached delegation information can be overwritten. (CVE-2022-30699)

  - A vulnerability named 'Non-Responsive Delegation Attack' (NRDelegation Attack) has been discovered in     various DNS resolving software. The NRDelegation Attack works by having a malicious delegation with a     considerable number of non responsive nameservers. The attack starts by querying a resolver for a record     that relies on those unresponsive nameservers. The attack can cause a resolver to spend a lot of     time/resources resolving records under a malicious delegation point where a considerable number of     unresponsive NS records reside. It can trigger high CPU usage in some resolver implementations that     continually look in the cache for resolved NS records in that delegation. This can lead to degraded     performance and eventually denial of service in orchestrated attacks. Unbound does not suffer from high     CPU usage, but resources are still needed for resolving the malicious delegation. Unbound will keep trying     to resolve the record until hard limits are reached. Based on the nature of the attack and the replies,     different limits could be reached. From version 1.16.3 on, Unbound introduces fixes for better performance     when under load, by cutting opportunistic queries for nameserver discovery and DNSKEY prefetching and     limiting the number of times a delegation point can issue a cache lookup for missing records.
    (CVE-2022-3204)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote Fedora 35 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2022-204ee3da84 advisory.

  - A vulnerability named 'Non-Responsive Delegation Attack' (NRDelegation Attack) has been discovered in     various DNS resolving software. The NRDelegation Attack works by having a malicious delegation with a     considerable number of non responsive nameservers. The attack starts by querying a resolver for a record     that relies on those unresponsive nameservers. The attack can cause a resolver to spend a lot of     time/resources resolving records under a malicious delegation point where a considerable number of     unresponsive NS records reside. It can trigger high CPU usage in some resolver implementations that     continually look in the cache for resolved NS records in that delegation. This can lead to degraded     performance and eventually denial of service in orchestrated attacks. Unbound does not suffer from high     CPU usage, but resources are still needed for resolving the malicious delegation. Unbound will keep trying     to resolve the record until hard limits are reached. Based on the nature of the attack and the replies,     different limits could be reached. From version 1.16.3 on, Unbound introduces fixes for better performance     when under load, by cutting opportunistic queries for nameserver discovery and DNSKEY prefetching and     limiting the number of times a delegation point can issue a cache lookup for missing records.
    (CVE-2022-3204)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Fedora 36 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2022-164cf7837e advisory.

  - A vulnerability named 'Non-Responsive Delegation Attack' (NRDelegation Attack) has been discovered in     various DNS resolving software. The NRDelegation Attack works by having a malicious delegation with a     considerable number of non responsive nameservers. The attack starts by querying a resolver for a record     that relies on those unresponsive nameservers. The attack can cause a resolver to spend a lot of     time/resources resolving records under a malicious delegation point where a considerable number of     unresponsive NS records reside. It can trigger high CPU usage in some resolver implementations that     continually look in the cache for resolved NS records in that delegation. This can lead to degraded     performance and eventually denial of service in orchestrated attacks. Unbound does not suffer from high     CPU usage, but resources are still needed for resolving the malicious delegation. Unbound will keep trying     to resolve the record until hard limits are reached. Based on the nature of the attack and the replies,     different limits could be reached. From version 1.16.3 on, Unbound introduces fixes for better performance     when under load, by cutting opportunistic queries for nameserver discovery and DNSKEY prefetching and     limiting the number of times a delegation point can issue a cache lookup for missing records.
    (CVE-2022-3204)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote host is affected by the vulnerability described in GLSA-202212-02 (Unbound: Multiple Vulnerabilities)

  - NLnet Labs Unbound, up to and including version 1.16.1 is vulnerable to a novel type of the ghost domain     names attack. The vulnerability works by targeting an Unbound instance. Unbound is queried for a     subdomain of a rogue domain name. The rogue nameserver returns delegation information for the subdomain     that updates Unbound's delegation cache. This action can be repeated before expiry of the delegation     information by querying Unbound for a second level subdomain which the rogue nameserver provides new     delegation information. Since Unbound is a child-centric resolver, the ever-updating child delegation     information can keep a rogue domain name resolvable long after revocation. From version 1.16.2 on, Unbound     checks the validity of parent delegation records before using cached delegation information.
    (CVE-2022-30698)

  - NLnet Labs Unbound, up to and including version 1.16.1, is vulnerable to a novel type of the ghost domain     names attack. The vulnerability works by targeting an Unbound instance. Unbound is queried for a rogue     domain name when the cached delegation information is about to expire. The rogue nameserver delays the     response so that the cached delegation information is expired. Upon receiving the delayed answer     containing the delegation information, Unbound overwrites the now expired entries. This action can be     repeated when the delegation information is about to expire making the rogue delegation information ever-     updating. From version 1.16.2 on, Unbound stores the start time for a query and uses that to decide if the     cached delegation information can be overwritten. (CVE-2022-30699)

  - A vulnerability named 'Non-Responsive Delegation Attack' (NRDelegation Attack) has been discovered in     various DNS resolving software. The NRDelegation Attack works by having a malicious delegation with a     considerable number of non responsive nameservers. The attack starts by querying a resolver for a record     that relies on those unresponsive nameservers. The attack can cause a resolver to spend a lot of     time/resources resolving records under a malicious delegation point where a considerable number of     unresponsive NS records reside. It can trigger high CPU usage in some resolver implementations that     continually look in the cache for resolved NS records in that delegation. This can lead to degraded     performance and eventually denial of service in orchestrated attacks. Unbound does not suffer from high     CPU usage, but resources are still needed for resolving the malicious delegation. Unbound will keep trying     to resolve the record until hard limits are reached. Based on the nature of the attack and the replies,     different limits could be reached. From version 1.16.3 on, Unbound introduces fixes for better performance     when under load, by cutting opportunistic queries for nameserver discovery and DNSKEY prefetching and     limiting the number of times a delegation point can issue a cache lookup for missing records.
    (CVE-2022-3204)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS / 22.10 host has packages installed that are affected by a vulnerability as referenced in the USN-5732-1 advisory.

  - A vulnerability named 'Non-Responsive Delegation Attack' (NRDelegation Attack) has been discovered in     various DNS resolving software. The NRDelegation Attack works by having a malicious delegation with a     considerable number of non responsive nameservers. The attack starts by querying a resolver for a record     that relies on those unresponsive nameservers. The attack can cause a resolver to spend a lot of     time/resources resolving records under a malicious delegation point where a considerable number of     unresponsive NS records reside. It can trigger high CPU usage in some resolver implementations that     continually look in the cache for resolved NS records in that delegation. This can lead to degraded     performance and eventually denial of service in orchestrated attacks. Unbound does not suffer from high     CPU usage, but resources are still needed for resolving the malicious delegation. Unbound will keep trying     to resolve the record until hard limits are reached. Based on the nature of the attack and the replies,     different limits could be reached. From version 1.16.3 on, Unbound introduces fixes for better performance     when under load, by cutting opportunistic queries for nameserver discovery and DNSKEY prefetching and     limiting the number of times a delegation point can issue a cache lookup for missing records.
    (CVE-2022-3204)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

According to the versions of the unbound packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - NLnet Labs Unbound, up to and including version 1.16.1 is vulnerable to a novel type of the 'ghost domain     names' attack. The vulnerability works by targeting an Unbound instance. Unbound is queried for a     subdomain of a rogue domain name. The rogue nameserver returns delegation information for the subdomain     that updates Unbound's delegation cache. This action can be repeated before expiry of the delegation     information by querying Unbound for a second level subdomain which the rogue nameserver provides new     delegation information. Since Unbound is a child-centric resolver, the ever-updating child delegation     information can keep a rogue domain name resolvable long after revocation. From version 1.16.2 on, Unbound     checks the validity of parent delegation records before using cached delegation information.
    (CVE-2022-30698)

  - NLnet Labs Unbound, up to and including version 1.16.1, is vulnerable to a novel type of the 'ghost domain     names' attack. The vulnerability works by targeting an Unbound instance. Unbound is queried for a rogue     domain name when the cached delegation information is about to expire. The rogue nameserver delays the     response so that the cached delegation information is expired. Upon receiving the delayed answer     containing the delegation information, Unbound overwrites the now expired entries. This action can be     repeated when the delegation information is about to expire making the rogue delegation information ever-     updating. From version 1.16.2 on, Unbound stores the start time for a query and uses that to decide if the     cached delegation information can be overwritten. (CVE-2022-30699)

  - A vulnerability named 'Non-Responsive Delegation Attack' (NRDelegation Attack) has been discovered in     various DNS resolving software. The NRDelegation Attack works by having a malicious delegation with a     considerable number of non responsive nameservers. The attack starts by querying a resolver for a record     that relies on those unresponsive nameservers. The attack can cause a resolver to spend a lot of     time/resources resolving records under a malicious delegation point where a considerable number of     unresponsive NS records reside. It can trigger high CPU usage in some resolver implementations that     continually look in the cache for resolved NS records in that delegation. This can lead to degraded     performance and eventually denial of service in orchestrated attacks. Unbound does not suffer from high     CPU usage, but resources are still needed for resolving the malicious delegation. Unbound will keep trying     to resolve the record until hard limits are reached. Based on the nature of the attack and the replies,     different limits could be reached. From version 1.16.3 on, Unbound introduces fixes for better performance     when under load, by cutting opportunistic queries for nameserver discovery and DNSKEY prefetching and     limiting the number of times a delegation point can issue a cache lookup for missing records.
    (CVE-2022-3204)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the 5a1c2e06-3fb7-11ed-a402-b42e991fc52e advisory.

  - A vulnerability named 'Non-Responsive Delegation Attack' (NRDelegation Attack) has been discovered in     various DNS resolving software. The NRDelegation Attack works by having a malicious delegation with a     considerable number of non responsive nameservers. The attack starts by querying a resolver for a record     that relies on those unresponsive nameservers. The attack can cause a resolver to spend a lot of     time/resources resolving records under a malicious delegation point where a considerable number of     unresponsive NS records reside. It can trigger high CPU usage in some resolver implementations that     continually look in the cache for resolved NS records in that delegation. This can lead to degraded     performance and eventually denial of service in orchestrated attacks. Unbound does not suffer from high     CPU usage, but resources are still needed for resolving the malicious delegation. Unbound will keep trying     to resolve the record until hard limits are reached. Based on the nature of the attack and the replies,     different limits could be reached. From version 1.16.3 on, Unbound introduces fixes for better performance     when under load, by cutting opportunistic queries for nameserver discovery and DNSKEY prefetching and     limiting the number of times a delegation point can issue a cache lookup for missing records.
    (CVE-2022-3204)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
176872	EulerOS Virtualization 2.11.1 : unbound (EulerOS-SA-2023-2042)	Nessus	Huawei Local Security Checks	high
176782	EulerOS Virtualization 2.11.0 : unbound (EulerOS-SA-2023-2094)	Nessus	Huawei Local Security Checks	high
176303	Oracle Linux 8 : unbound (ELSA-2023-2771)	Nessus	Oracle Linux Local Security Checks	high
176163	AlmaLinux 8 : unbound (ALSA-2023:2771)	Nessus	Alma Linux Local Security Checks	high
175897	CentOS 8 : unbound (CESA-2023:2771)	Nessus	CentOS Local Security Checks	high
175834	RHEL 8 : unbound (RHSA-2023:2771)	Nessus	Red Hat Local Security Checks	high
175680	Oracle Linux 9 : unbound (ELSA-2023-2370)	Nessus	Oracle Linux Local Security Checks	high
175603	AlmaLinux 9 : unbound (ALSA-2023:2370)	Nessus	Alma Linux Local Security Checks	high
175439	RHEL 9 : unbound (RHSA-2023:2370)	Nessus	Red Hat Local Security Checks	high
175172	EulerOS Virtualization 3.0.2.0 : unbound (EulerOS-SA-2023-1730)	Nessus	Huawei Local Security Checks	high
173496	CBL Mariner 2.0 Security Update: unbound (CVE-2022-3204)	Nessus	MarinerOS Local Security Checks	high
173079	Amazon Linux 2023 : python3-unbound, unbound, unbound-anchor (ALAS2023-2023-078)	Nessus	Amazon Linux Local Security Checks	medium
172349	EulerOS 2.0 SP5 : unbound (EulerOS-SA-2023-1517)	Nessus	Huawei Local Security Checks	high
170611	Amazon Linux 2022 : (ALAS2022-2023-265)	Nessus	Amazon Linux Local Security Checks	medium
170171	Oracle Solaris Critical Patch Update : jan2023_SRU11_4_53_132_2	Nessus	Solaris Local Security Checks	critical
169983	EulerOS Virtualization 2.9.0 : unbound (EulerOS-SA-2023-1236)	Nessus	Huawei Local Security Checks	medium
169870	EulerOS Virtualization 2.9.1 : unbound (EulerOS-SA-2023-1206)	Nessus	Huawei Local Security Checks	medium
169859	EulerOS Virtualization 2.10.1 : unbound (EulerOS-SA-2023-1156)	Nessus	Huawei Local Security Checks	high
169851	EulerOS Virtualization 2.10.0 : unbound (EulerOS-SA-2023-1177)	Nessus	Huawei Local Security Checks	high
169568	EulerOS 2.0 SP11 : unbound (EulerOS-SA-2023-1049)	Nessus	Huawei Local Security Checks	high
169533	EulerOS 2.0 SP11 : unbound (EulerOS-SA-2023-1024)	Nessus	Huawei Local Security Checks	high
169153	Fedora 35 : unbound (2022-204ee3da84)	Nessus	Fedora Local Security Checks	high
169108	Fedora 36 : unbound (2022-164cf7837e)	Nessus	Fedora Local Security Checks	high
169004	EulerOS 2.0 SP10 : unbound (EulerOS-SA-2022-2833)	Nessus	Huawei Local Security Checks	high
168993	EulerOS 2.0 SP10 : unbound (EulerOS-SA-2022-2859)	Nessus	Huawei Local Security Checks	high
168909	GLSA-202212-02 : Unbound: Multiple Vulnerabilities	Nessus	Gentoo Local Security Checks	medium
168512	EulerOS 2.0 SP8 : unbound (EulerOS-SA-2022-2808)	Nessus	Huawei Local Security Checks	high
167865	Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS / 22.10 : Unbound vulnerability (USN-5732-1)	Nessus	Ubuntu Local Security Checks	high
167386	EulerOS 2.0 SP9 : unbound (EulerOS-SA-2022-2781)	Nessus	Huawei Local Security Checks	medium
167382	EulerOS 2.0 SP9 : unbound (EulerOS-SA-2022-2746)	Nessus	Huawei Local Security Checks	medium
165569	FreeBSD : unbound -- Non-Responsive Delegation Attack (5a1c2e06-3fb7-11ed-a402-b42e991fc52e)	Nessus	FreeBSD Local Security Checks	high

CVE-2022-3204

high

Tenable Plugins

high

high

high

high

high

high

high

high

high

high

high

medium

high

medium

critical

medium

medium

high

high

high

high

high

high

high

high

medium

high

high

medium

medium

high