The default cloud-init configuration, in cloud-init 0.6.2 and newer, included "ssh_deletekeys: 0", disabling cloud-init's deletion of ssh host keys. In some environments, this could lead to instances created by cloning a golden master or template system, sharing ssh host keys, and being able to impersonate one another or conduct man-in-the-middle attacks.

The remote NewStart CGSL host, running version MAIN 6.06, has cloud-init packages installed that are affected by multiple vulnerabilities:

  - The default cloud-init configuration, in cloud-init 0.6.2 and newer, included ssh_deletekeys: 0,     disabling cloud-init's deletion of ssh host keys. In some environments, this could lead to instances     created by cloning a golden master or template system, sharing ssh host keys, and being able to     impersonate one another or conduct man-in-the-middle attacks. (CVE-2018-10896)

  - cloud-init through 19.4 relies on Mersenne Twister for a random password, which makes it easier for     attackers to predict passwords, because rand_str in cloudinit/util.py calls the random.choice function.
    (CVE-2020-8631)

  - In cloud-init through 19.4, rand_user_password in cloudinit/config/cc_set_passwords.py has a small default     pwlen value, which makes it easier for attackers to guess passwords. (CVE-2020-8632)

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

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - The default cloud-init configuration, in cloud-init 0.6.2 and newer, included ssh_deletekeys: 0,     disabling cloud-init's deletion of ssh host keys. In some environments, this could lead to instances     created by cloning a golden master or template system, sharing ssh host keys, and being able to     impersonate one another or conduct man-in-the-middle attacks. (CVE-2018-10896)

Note that Nessus relies on the presence of the package as reported by the vendor.

The remote Oracle Linux 7 host has a package installed that is affected by multiple vulnerabilities as referenced in the ELSA-2020-3898 advisory.

    - Resolves: bz#1574338       (CVE-2018-10896 cloud-init: SSH host keys are not regenerated for the new instances [rhel-7])
    - Resolves: bz#1812170       (CVE-2020-8632 cloud-init: Too short random password length in cc_set_password in     config/cc_set_passwords.py [rhel-7])
    - Resolves: bz#1812173       (CVE-2020-8631 cloud-init: Use of random.choice when generating random password [rhel-7])

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

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 cloud-init package installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - The default cloud-init configuration, in cloud-init 0.6.2 and newer, included 'ssh_deletekeys: 0',     disabling cloud-init's deletion of ssh host keys. In some environments, this could lead to instances     created by cloning a golden master or template system, sharing ssh host keys, and being able to     impersonate one another or conduct man-in-the-middle attacks. (CVE-2018-10896)

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 AOS installed on the remote host is prior to 5.15.5. It is, therefore, affected by multiple vulnerabilities as referenced in the NXSA-AOS-5.15.5 advisory.

  - In Network Security Services (NSS) before 3.46, several cryptographic primitives had missing length     checks. In cases where the application calling the library did not perform a sanity check on the inputs it     could result in a crash due to a buffer overflow. (CVE-2019-17006)

  - Heap buffer overflow in the TFTP protocol handler in cURL 7.19.4 to 7.65.3. (CVE-2019-5482)

  - In all versions of cpio before 2.13 does not properly validate input files when generating TAR archives.
    When cpio is used to create TAR archives from paths an attacker can write to, the resulting archive may     contain files with permissions the attacker did not have or in paths he did not have access to. Extracting     those archives from a high-privilege user without carefully reviewing them may lead to the compromise of     the system. (CVE-2019-14866)

  - If an HTTP/2 client connecting to Apache Tomcat 10.0.0-M1 to 10.0.0-M7, 9.0.0.M1 to 9.0.37 or 8.5.0 to     8.5.57 exceeded the agreed maximum number of concurrent streams for a connection (in violation of the     HTTP/2 protocol), it was possible that a subsequent request made on that connection could contain HTTP     headers - including HTTP/2 pseudo headers - from a previous request rather than the intended headers. This     could lead to users seeing responses for unexpected resources. (CVE-2020-13943)

  - Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supported     versions that are affected are 5.6.45 and prior, 5.7.27 and prior and 8.0.17 and prior. Easily exploitable     vulnerability allows low privileged attacker with network access via multiple protocols to compromise     MySQL Server. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang     or frequently repeatable crash (complete DOS) of MySQL Server. (CVE-2019-2974)

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

The version of AOS installed on the remote host is prior to 5.19.1. It is, therefore, affected by multiple vulnerabilities as referenced in the NXSA-AOS-5.19.1 advisory.

  - In Network Security Services (NSS) before 3.46, several cryptographic primitives had missing length     checks. In cases where the application calling the library did not perform a sanity check on the inputs it     could result in a crash due to a buffer overflow. (CVE-2019-17006)

  - Heap buffer overflow in the TFTP protocol handler in cURL 7.19.4 to 7.65.3. (CVE-2019-5482)

  - In all versions of cpio before 2.13 does not properly validate input files when generating TAR archives.
    When cpio is used to create TAR archives from paths an attacker can write to, the resulting archive may     contain files with permissions the attacker did not have or in paths he did not have access to. Extracting     those archives from a high-privilege user without carefully reviewing them may lead to the compromise of     the system. (CVE-2019-14866)

  - If an HTTP/2 client connecting to Apache Tomcat 10.0.0-M1 to 10.0.0-M7, 9.0.0.M1 to 9.0.37 or 8.5.0 to     8.5.57 exceeded the agreed maximum number of concurrent streams for a connection (in violation of the     HTTP/2 protocol), it was possible that a subsequent request made on that connection could contain HTTP     headers - including HTTP/2 pseudo headers - from a previous request rather than the intended headers. This     could lead to users seeing responses for unexpected resources. (CVE-2020-13943)

  - Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supported     versions that are affected are 5.6.45 and prior, 5.7.27 and prior and 8.0.17 and prior. Easily exploitable     vulnerability allows low privileged attacker with network access via multiple protocols to compromise     MySQL Server. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang     or frequently repeatable crash (complete DOS) of MySQL Server. (CVE-2019-2974)

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

The version of AOS installed on the remote host is prior to 5.19.0.5. It is, therefore, affected by multiple vulnerabilities as referenced in the NXSA-AOS-5.19.0.5 advisory.

  - In Network Security Services (NSS) before 3.46, several cryptographic primitives had missing length     checks. In cases where the application calling the library did not perform a sanity check on the inputs it     could result in a crash due to a buffer overflow. (CVE-2019-17006)

  - Heap buffer overflow in the TFTP protocol handler in cURL 7.19.4 to 7.65.3. (CVE-2019-5482)

  - In all versions of cpio before 2.13 does not properly validate input files when generating TAR archives.
    When cpio is used to create TAR archives from paths an attacker can write to, the resulting archive may     contain files with permissions the attacker did not have or in paths he did not have access to. Extracting     those archives from a high-privilege user without carefully reviewing them may lead to the compromise of     the system. (CVE-2019-14866)

  - If an HTTP/2 client connecting to Apache Tomcat 10.0.0-M1 to 10.0.0-M7, 9.0.0.M1 to 9.0.37 or 8.5.0 to     8.5.57 exceeded the agreed maximum number of concurrent streams for a connection (in violation of the     HTTP/2 protocol), it was possible that a subsequent request made on that connection could contain HTTP     headers - including HTTP/2 pseudo headers - from a previous request rather than the intended headers. This     could lead to users seeing responses for unexpected resources. (CVE-2020-13943)

  - Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supported     versions that are affected are 5.6.45 and prior, 5.7.27 and prior and 8.0.17 and prior. Easily exploitable     vulnerability allows low privileged attacker with network access via multiple protocols to compromise     MySQL Server. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang     or frequently repeatable crash (complete DOS) of MySQL Server. (CVE-2019-2974)

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 cloud-init package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - The default cloud-init configuration, in cloud-init 0.6.2 and newer, included 'ssh_deletekeys: 0',     disabling cloud-init's deletion of ssh host keys. In some environments, this could lead to instances     created by cloning a golden master or template system, sharing ssh host keys, and being able to     impersonate one another or conduct man-in-the-middle attacks. (CVE-2018-10896)

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 NewStart CGSL host, running version CORE 5.05 / MAIN 5.05, has cloud-init packages installed that are affected by multiple vulnerabilities:

  - The default cloud-init configuration, in cloud-init 0.6.2 and newer, included ssh_deletekeys: 0,     disabling cloud-init's deletion of ssh host keys. In some environments, this could lead to instances     created by cloning a golden master or template system, sharing ssh host keys, and being able to     impersonate one another or conduct man-in-the-middle attacks. (CVE-2018-10896)

  - A security feature bypass exists in Azure SSH Keypairs, due to a change in the provisioning logic for some     Linux images that use cloud-init, aka 'Azure SSH Keypairs Security Feature Bypass Vulnerability'.
    (CVE-2019-0816)

  - cloud-init through 19.4 relies on Mersenne Twister for a random password, which makes it easier for     attackers to predict passwords, because rand_str in cloudinit/util.py calls the random.choice function.
    (CVE-2020-8631)

  - In cloud-init through 19.4, rand_user_password in cloudinit/config/cc_set_passwords.py has a small default     pwlen value, which makes it easier for attackers to guess passwords. (CVE-2020-8632)

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

The remote NewStart CGSL host, running version CORE 5.04 / MAIN 5.04, has cloud-init packages installed that are affected by multiple vulnerabilities:

  - The default cloud-init configuration, in cloud-init 0.6.2 and newer, included ssh_deletekeys: 0,     disabling cloud-init's deletion of ssh host keys. In some environments, this could lead to instances     created by cloning a golden master or template system, sharing ssh host keys, and being able to     impersonate one another or conduct man-in-the-middle attacks. (CVE-2018-10896)

  - In cloud-init through 19.4, rand_user_password in cloudinit/config/cc_set_passwords.py has a small default     pwlen value, which makes it easier for attackers to guess passwords. (CVE-2020-8632)

  - cloud-init through 19.4 relies on Mersenne Twister for a random password, which makes it easier for     attackers to predict passwords, because rand_str in cloudinit/util.py calls the random.choice function.
    (CVE-2020-8631)

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

The remote NewStart CGSL host, running version MAIN 6.02, has cloud-init packages installed that are affected by a vulnerability:

  - The default cloud-init configuration, in cloud-init 0.6.2 and newer, included ssh_deletekeys: 0,     disabling cloud-init's deletion of ssh host keys. In some environments, this could lead to instances     created by cloning a golden master or template system, sharing ssh host keys, and being able to     impersonate one another or conduct man-in-the-middle attacks. (CVE-2018-10896)

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 a package installed that is affected by a vulnerability as referenced in the CESA-2020:3050 advisory.

  - cloud-init: default configuration disabled deletion of SSH host keys (CVE-2018-10896)

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

The version of cloud-init installed on the remote host is prior to 19.3-4. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2021-1576 advisory.

    The default cloud-init configuration included ssh_deletekeys: 0, disabling cloud-init's deletion of ssh     host keys. In some environments, this could lead to instances created by cloning a golden master or     template system, sharing ssh host keys, and being able to impersonate one another or conduct man-in-the-     middle attacks. (CVE-2018-10896)

    A flaw was found in cloud-init, where it uses the random.choice function when creating sensitive random     strings used for generating a random password in new instances. Depending on the instance configuration, a     remote or local attacker may abuse this vulnerability to guess the password of the victim user.
    (CVE-2020-8631)

    A flaw was found in cloud-init, where it uses short passwords when generating a random password in new     instances. Depending on the instance configuration, a remote or local attacker may abuse this     vulnerability to guess the password of the victim user. (CVE-2020-8632)

Tenable has extracted the preceding description block directly from the tested product security advisory.

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 version of the cloud-init package installed, the EulerOS installation on the remote host is affected by the following vulnerability :

  - The default cloud-init configuration, in cloud-init     0.6.2 and newer, included 'ssh_deletekeys: 0',     disabling cloud-init's deletion of ssh host keys. In     some environments, this could lead to instances created     by cloning a golden master or template system, sharing     ssh host keys, and being able to impersonate one     another or conduct man-in-the-middle     attacks.(CVE-2018-10896)

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.

Security Fix(es) :

  - cloud-init: Use of random.choice when generating random     password (CVE-2020-8631)

  - cloud-init: Too short random password length in     cc_set_password in config/cc_set_passwords.py     (CVE-2020-8632)

  - cloud-init: default configuration disabled deletion of     SSH host keys (CVE-2018-10896)

The remote CentOS Linux 7 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2020:3898 advisory.

  - The default cloud-init configuration, in cloud-init 0.6.2 and newer, included ssh_deletekeys: 0,     disabling cloud-init's deletion of ssh host keys. In some environments, this could lead to instances     created by cloning a golden master or template system, sharing ssh host keys, and being able to     impersonate one another or conduct man-in-the-middle attacks. (CVE-2018-10896)

  - cloud-init through 19.4 relies on Mersenne Twister for a random password, which makes it easier for     attackers to predict passwords, because rand_str in cloudinit/util.py calls the random.choice function.
    (CVE-2020-8631)

  - In cloud-init through 19.4, rand_user_password in cloudinit/config/cc_set_passwords.py has a small default     pwlen value, which makes it easier for attackers to guess passwords. (CVE-2020-8632)

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 7 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2020:3898 advisory.

    The cloud-init packages provide a set of init scripts for cloud instances. Cloud instances need special     scripts to run during initialization to retrieve and install SSH keys, and to let the user run various     scripts.

    The following packages have been upgraded to a later upstream version: cloud-init (19.4). (BZ#1803094)

    Security Fix(es):

    * cloud-init: Use of random.choice when generating random password (CVE-2020-8631)

    * cloud-init: Too short random password length in cc_set_password in config/cc_set_passwords.py     (CVE-2020-8632)

    * cloud-init: default configuration disabled deletion of SSH host keys (CVE-2018-10896)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

    Additional Changes:

    For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.9 Release Notes     linked from the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

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 version of the cloud-init package installed, the EulerOS Virtualization for ARM 64 installation on the remote host is affected by the following vulnerability :

  - The default cloud-init configuration, in cloud-init     0.6.2 and newer, included 'ssh_deletekeys: 0',     disabling cloud-init's deletion of ssh host keys. In     some environments, this could lead to instances created     by cloning a golden master or template system, sharing     ssh host keys, and being able to impersonate one     another or conduct man-in-the-middle     attacks.(CVE-2018-10896)

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 Redhat Enterprise Linux 8 host has a package installed that is affected by a vulnerability as referenced in the RHSA-2020:3644 advisory.

    The cloud-init packages provide a set of init scripts for cloud instances. Cloud instances need special     scripts to run during initialization to retrieve and install SSH keys, and to let the user run various     scripts.

    Security Fix(es):

    * cloud-init: default configuration disabled deletion of SSH host keys (CVE-2018-10896)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

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 a package installed that is affected by a vulnerability as referenced in the RHSA-2020:3050 advisory.

    The cloud-init packages provide a set of init scripts for cloud instances. Cloud instances need special     scripts to run during initialization to retrieve and install SSH keys, and to let the user run various     scripts.

    The following packages have been upgraded to a later upstream version: cloud-init (19.4). (BZ#1811912)

    Security Fix(es):

    * cloud-init: default configuration disabled deletion of SSH host keys (CVE-2018-10896)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

    Additional Changes:

    For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.2 Release Notes     linked from the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

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
266234	NewStart CGSL MAIN 6.06 : cloud-init Multiple Vulnerabilities (NS-SA-2025-0230)	Nessus	NewStart CGSL Local Security Checks	high
222092	Linux Distros Unpatched Vulnerability : CVE-2018-10896	Nessus	Misc.	high
180994	Oracle Linux 7 : cloud-init (ELSA-2020-3898)	Nessus	Oracle Linux Local Security Checks	high
169607	EulerOS Virtualization 3.0.2.6 : cloud-init (EulerOS-SA-2023-1085)	Nessus	Huawei Local Security Checks	high
165898	EulerOS Virtualization 3.0.6.6 : cloud-init (EulerOS-SA-2022-2490)	Nessus	Huawei Local Security Checks	high
164599	Nutanix AOS : Multiple Vulnerabilities (NXSA-AOS-5.15.5)	Nessus	Misc.	critical
164584	Nutanix AOS : Multiple Vulnerabilities (NXSA-AOS-5.19.1)	Nessus	Misc.	critical
164556	Nutanix AOS : Multiple Vulnerabilities (NXSA-AOS-5.19.0.5)	Nessus	Misc.	critical
161585	EulerOS 2.0 SP3 : cloud-init (EulerOS-SA-2022-1709)	Nessus	Huawei Local Security Checks	high
160701	EulerOS Virtualization 3.0.2.0 : cloud-init (EulerOS-SA-2022-1682)	Nessus	Huawei Local Security Checks	high
159082	EulerOS 2.0 SP5 : cloud-init (EulerOS-SA-2022-1318)	Nessus	Huawei Local Security Checks	high
154516	NewStart CGSL CORE 5.05 / MAIN 5.05 : cloud-init Multiple Vulnerabilities (NS-SA-2021-0151)	Nessus	NewStart CGSL Local Security Checks	high
147387	NewStart CGSL CORE 5.04 / MAIN 5.04 : cloud-init Multiple Vulnerabilities (NS-SA-2021-0016)	Nessus	NewStart CGSL Local Security Checks	high
147346	NewStart CGSL MAIN 6.02 : cloud-init Vulnerability (NS-SA-2021-0051)	Nessus	NewStart CGSL Local Security Checks	high
145805	CentOS 8 : cloud-init (CESA-2020:3050)	Nessus	CentOS Local Security Checks	high
144795	Amazon Linux 2 : cloud-init (ALAS-2021-1576)	Nessus	Amazon Linux Local Security Checks	high
142329	EulerOS 2.0 SP9 : cloud-init (EulerOS-SA-2020-2408)	Nessus	Huawei Local Security Checks	high
142321	EulerOS 2.0 SP9 : cloud-init (EulerOS-SA-2020-2426)	Nessus	Huawei Local Security Checks	high
141687	Scientific Linux Security Update : cloud-init on SL7.x x86_64 (20201001)	Nessus	Scientific Linux Local Security Checks	high
141635	CentOS 7 : cloud-init (RHSA-2020:3898)	Nessus	CentOS Local Security Checks	high
141025	RHEL 7 : cloud-init (RHSA-2020:3898)	Nessus	Red Hat Local Security Checks	high
140989	EulerOS Virtualization for ARM 64 3.0.6.0 : cloud-init (EulerOS-SA-2020-2041)	Nessus	Huawei Local Security Checks	high
140399	RHEL 8 : cloud-init (RHSA-2020:3644)	Nessus	Red Hat Local Security Checks	high
139943	EulerOS 2.0 SP8 : cloud-init (EulerOS-SA-2020-1840)	Nessus	Huawei Local Security Checks	high
138810	RHEL 8 : cloud-init (RHSA-2020:3050)	Nessus	Red Hat Local Security Checks	high

Detections

Analytics

CVE-2018-10896

high

Tenable Plugins

high

high

high

high

high

critical

critical

critical

high

high

high

high

high

high

high

high

high

high

high

high

high

high

high

high

high