Buffer overflow vulnerability in c-ares before 1_16_1 thru 1_17_0 via function ares_parse_soa_reply in ares_parse_soa_reply.c.

The remote Redhat Enterprise Linux 6 host has one or more packages installed that are affected by multiple vulnerabilities that have been acknowledged by the vendor but will not be patched.

  - c-ares: Single byte out of buffer write (CVE-2016-5180)

  - The c-ares function `ares_parse_naptr_reply()`, which is used for parsing NAPTR responses, could be     triggered to read memory outside of the given input buffer if the passed in DNS response packet was     crafted in a particular way. (CVE-2017-1000381)

  - Buffer overflow vulnerability in c-ares before 1_16_1 thru 1_17_0 via function ares_parse_soa_reply in     ares_parse_soa_reply.c. (CVE-2020-22217)

  - A flaw was found in c-ares library, where a missing input validation check of host names returned by DNS     (Domain Name Servers) can lead to output of wrong hostnames which might potentially lead to Domain     Hijacking. The highest threat from this vulnerability is to confidentiality and integrity as well as     system availability. (CVE-2021-3672)

  - A flaw was found in the c-ares package. The ares_set_sortlist is missing checks about the validity of the     input string, which allows a possible arbitrary length stack overflow. This issue may cause a denial of     service or a limited impact on confidentiality and integrity. (CVE-2022-4904)

  - c-ares is an asynchronous resolver library. When cross-compiling c-ares and using the autotools build     system, CARES_RANDOM_FILE will not be set, as seen when cross compiling aarch64 android. This will     downgrade to using rand() as a fallback which could allow an attacker to take advantage of the lack of     entropy by not using a CSPRNG. This issue was patched in version 1.19.1. (CVE-2023-31124)

  - c-ares is an asynchronous resolver library. ares_inet_net_pton() is vulnerable to a buffer underflow for     certain ipv6 addresses, in particular 0::00:00:00/2 was found to cause an issue. C-ares only uses this     function internally for configuration purposes which would require an administrator to configure such an     address via ares_set_sortlist(). However, users may externally use ares_inet_net_pton() for other purposes     and thus be vulnerable to more severe issues. This issue has been fixed in 1.19.1. (CVE-2023-31130)

  - c-ares is an asynchronous resolver library. When /dev/urandom or RtlGenRandom() are unavailable, c-ares     uses rand() to generate random numbers used for DNS query ids. This is not a CSPRNG, and it is also not     seeded by srand() so will generate predictable output. Input from the random number generator is fed into     a non-compilant RC4 implementation and may not be as strong as the original RC4 implementation. No attempt     is made to look for modern OS-provided CSPRNGs like arc4random() that is widely available. This issue has     been fixed in version 1.19.1. (CVE-2023-31147)

  - c-ares is an asynchronous resolver library. c-ares is vulnerable to denial of service. If a target     resolver sends a query, the attacker forges a malformed UDP packet with a length of 0 and returns them to     the target resolver. The target resolver erroneously interprets the 0 length as a graceful shutdown of the     connection. This issue has been patched in version 1.19.1. (CVE-2023-32067)

  - c-ares is a C library for asynchronous DNS requests. `ares__read_line()` is used to parse local     configuration files such as `/etc/resolv.conf`, `/etc/nsswitch.conf`, the `HOSTALIASES` file, and if using     a c-ares version prior to 1.27.0, the `/etc/hosts` file. If any of these configuration files has an     embedded `NULL` character as the first character in a new line, it can lead to attempting to read memory     prior to the start of the given buffer which may result in a crash. This issue is fixed in c-ares 1.27.0.
    No known workarounds exist. (CVE-2024-25629)

Note that Nessus has not tested for these issues but has instead relied on the package manager's report that the package is installed.

The remote Redhat Enterprise Linux 7 host has one or more packages installed that are affected by multiple vulnerabilities that have been acknowledged by the vendor but will not be patched.

  - c-ares: Single byte out of buffer write (CVE-2016-5180)

  - The c-ares function `ares_parse_naptr_reply()`, which is used for parsing NAPTR responses, could be     triggered to read memory outside of the given input buffer if the passed in DNS response packet was     crafted in a particular way. (CVE-2017-1000381)

  - Buffer overflow vulnerability in c-ares before 1_16_1 thru 1_17_0 via function ares_parse_soa_reply in     ares_parse_soa_reply.c. (CVE-2020-22217)

  - A flaw was found in c-ares library, where a missing input validation check of host names returned by DNS     (Domain Name Servers) can lead to output of wrong hostnames which might potentially lead to Domain     Hijacking. The highest threat from this vulnerability is to confidentiality and integrity as well as     system availability. (CVE-2021-3672)

  - c-ares is an asynchronous resolver library. When cross-compiling c-ares and using the autotools build     system, CARES_RANDOM_FILE will not be set, as seen when cross compiling aarch64 android. This will     downgrade to using rand() as a fallback which could allow an attacker to take advantage of the lack of     entropy by not using a CSPRNG. This issue was patched in version 1.19.1. (CVE-2023-31124)

  - c-ares is an asynchronous resolver library. ares_inet_net_pton() is vulnerable to a buffer underflow for     certain ipv6 addresses, in particular 0::00:00:00/2 was found to cause an issue. C-ares only uses this     function internally for configuration purposes which would require an administrator to configure such an     address via ares_set_sortlist(). However, users may externally use ares_inet_net_pton() for other purposes     and thus be vulnerable to more severe issues. This issue has been fixed in 1.19.1. (CVE-2023-31130)

  - c-ares is an asynchronous resolver library. When /dev/urandom or RtlGenRandom() are unavailable, c-ares     uses rand() to generate random numbers used for DNS query ids. This is not a CSPRNG, and it is also not     seeded by srand() so will generate predictable output. Input from the random number generator is fed into     a non-compilant RC4 implementation and may not be as strong as the original RC4 implementation. No attempt     is made to look for modern OS-provided CSPRNGs like arc4random() that is widely available. This issue has     been fixed in version 1.19.1. (CVE-2023-31147)

  - c-ares is a C library for asynchronous DNS requests. `ares__read_line()` is used to parse local     configuration files such as `/etc/resolv.conf`, `/etc/nsswitch.conf`, the `HOSTALIASES` file, and if using     a c-ares version prior to 1.27.0, the `/etc/hosts` file. If any of these configuration files has an     embedded `NULL` character as the first character in a new line, it can lead to attempting to read memory     prior to the start of the given buffer which may result in a crash. This issue is fixed in c-ares 1.27.0.
    No known workarounds exist. (CVE-2024-25629)

Note that Nessus has not tested for these issues but has instead relied on the package manager's report that the package is installed.

The remote CentOS Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the CESA-2023:7207 advisory.

  - Buffer overflow vulnerability in c-ares before 1_16_1 thru 1_17_0 via function ares_parse_soa_reply in     ares_parse_soa_reply.c. (CVE-2020-22217)

  - c-ares is an asynchronous resolver library. ares_inet_net_pton() is vulnerable to a buffer underflow for     certain ipv6 addresses, in particular 0::00:00:00/2 was found to cause an issue. C-ares only uses this     function internally for configuration purposes which would require an administrator to configure such an     address via ares_set_sortlist(). However, users may externally use ares_inet_net_pton() for other purposes     and thus be vulnerable to more severe issues. This issue has been fixed in 1.19.1. (CVE-2023-31130)

Note that Nessus has not tested for these issues 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-2024:0578 advisory.

  - c-ares: Heap buffer over read in ares_parse_soa_reply (CVE-2020-22217)

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-2024:0419 advisory.

  - c-ares: Heap buffer over read in ares_parse_soa_reply (CVE-2020-22217)

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

The remote Rocky Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2023:7207 advisory.

  - Buffer overflow vulnerability in c-ares before 1_16_1 thru 1_17_0 via function ares_parse_soa_reply in     ares_parse_soa_reply.c. (CVE-2020-22217)

  - c-ares is an asynchronous resolver library. ares_inet_net_pton() is vulnerable to a buffer underflow for     certain ipv6 addresses, in particular 0::00:00:00/2 was found to cause an issue. C-ares only uses this     function internally for configuration purposes which would require an administrator to configure such an     address via ares_set_sortlist(). However, users may externally use ares_inet_net_pton() for other purposes     and thus be vulnerable to more severe issues. This issue has been fixed in 1.19.1. (CVE-2023-31130)

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

The remote Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2023-7207 advisory.

  - Buffer overflow vulnerability in c-ares before 1_16_1 thru 1_17_0 via function ares_parse_soa_reply in     ares_parse_soa_reply.c. (CVE-2020-22217)

  - c-ares is an asynchronous resolver library. ares_inet_net_pton() is vulnerable to a buffer underflow for     certain ipv6 addresses, in particular 0::00:00:00/2 was found to cause an issue. C-ares only uses this     function internally for configuration purposes which would require an administrator to configure such an     address via ares_set_sortlist(). However, users may externally use ares_inet_net_pton() for other purposes     and thus be vulnerable to more severe issues. This issue has been fixed in 1.19.1. (CVE-2023-31130)

Note that Nessus has not tested for these issues 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 multiple vulnerabilities as referenced in the RHSA-2023:7207 advisory.

  - c-ares: Heap buffer over read in ares_parse_soa_reply (CVE-2020-22217)

  - c-ares: Buffer Underwrite in ares_inet_net_pton() (CVE-2023-31130)

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

The remote SUSE Linux SLED12 / SLED_SAP12 / SLES12 / SLES_SAP12 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2023:3690-1 advisory.

  - Buffer overflow vulnerability in c-ares before 1_16_1 thru 1_17_0 via function ares_parse_soa_reply in     ares_parse_soa_reply.c. (CVE-2020-22217)

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

The remote Ubuntu 20.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-6376-1 advisory.

  - Buffer overflow vulnerability in c-ares before 1_16_1 thru 1_17_0 via function ares_parse_soa_reply in     ares_parse_soa_reply.c. (CVE-2020-22217)

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

The remote Debian 10 host has packages installed that are affected by a vulnerability as referenced in the dla-3567 advisory.

  - Buffer overflow vulnerability in c-ares before 1_16_1 thru 1_17_0 via function ares_parse_soa_reply in     ares_parse_soa_reply.c. (CVE-2020-22217)

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
196177	RHEL 6 : c-ares (Unpatched Vulnerability)	Nessus	Red Hat Local Security Checks	critical
196167	RHEL 7 : c-ares (Unpatched Vulnerability)	Nessus	Red Hat Local Security Checks	critical
190217	CentOS 8 : c-ares (CESA-2023:7207)	Nessus	CentOS Local Security Checks	medium
189820	RHEL 8 : c-ares (RHSA-2024:0578)	Nessus	Red Hat Local Security Checks	medium
189574	RHEL 8 : c-ares (RHSA-2024:0419)	Nessus	Red Hat Local Security Checks	medium
186397	Rocky Linux 8 : c-ares (RLSA-2023:7207)	Nessus	Rocky Linux Local Security Checks	medium
186199	Oracle Linux 8 : c-ares (ELSA-2023-7207)	Nessus	Oracle Linux Local Security Checks	medium
185701	RHEL 8 : c-ares (RHSA-2023:7207)	Nessus	Red Hat Local Security Checks	medium
181737	SUSE SLED12 / SLES12 Security Update : libcares2 (SUSE-SU-2023:3690-1)	Nessus	SuSE Local Security Checks	medium
181540	Ubuntu 20.04 LTS : c-ares vulnerability (USN-6376-1)	Nessus	Ubuntu Local Security Checks	medium
181511	Debian DLA-3567-1 : c-ares - LTS security update	Nessus	Debian Local Security Checks	medium

Detections

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CVE-2020-22217

medium

Tenable Plugins

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critical

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