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

  - A vulnerability was discovered in the PyYAML library in versions before 5.4, where it is susceptible to     arbitrary code execution when it processes untrusted YAML files through the full_load method or with the     FullLoader loader. Applications that use the library to process untrusted input may be vulnerable to this     flaw. This flaw allows an attacker to execute arbitrary code on the system by abusing the     python/object/new constructor. This flaw is due to an incomplete fix for CVE-2020-1747. (CVE-2020-14343)

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.

According to the version of the PyYAML package installed, the EulerOS Virtualization for ARM 64 installation on the remote host is affected by the following vulnerability :

  - A vulnerability was discovered in the PyYAML library in     versions before 5.4, where it is susceptible to     arbitrary code execution when it processes untrusted     YAML files through the full_load method or with the     FullLoader loader. Applications that use the library to     process untrusted input may be vulnerable to this flaw.
    This flaw allows an attacker to execute arbitrary code     on the system by abusing the python/object/new     constructor. This flaw is due to an incomplete fix for     CVE-2020-1747.(CVE-2020-14343)

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.

According to the version of the PyYAML package installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerability :

  - A vulnerability was discovered in the PyYAML library in     versions before 5.4, where it is susceptible to     arbitrary code execution when it processes untrusted     YAML files through the full_load method or with the     FullLoader loader. Applications that use the library to     process untrusted input may be vulnerable to this flaw.
    This flaw allows an attacker to execute arbitrary code     on the system by abusing the python/object/new     constructor. This flaw is due to an incomplete fix for     CVE-2020-1747.(CVE-2020-14343)

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.

According to the version of the pyyaml package installed, the EulerOS installation on the remote host is affected by the following vulnerability :

  - A vulnerability was discovered in the PyYAML library in     versions before 5.4, where it is susceptible to     arbitrary code execution when it processes untrusted     YAML files through the full_load method or with the     FullLoader loader. Applications that use the library to     process untrusted input may be vulnerable to this flaw.
    This flaw allows an attacker to execute arbitrary code     on the system by abusing the python/object/new     constructor. This flaw is due to an incomplete fix for     CVE-2020-1747.(CVE-2020-14343)

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 Ubuntu 20.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-4940-1 advisory.

    It was discovered that PyYAML incorrectly handled untrusted YAML files with the FullLoader loader. A     remote attacker could possibly use this issue to execute arbitrary code.

Tenable has extracted the preceding description block directly from the Ubuntu 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 version of PyYAML 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-2020-14343 advisory.

  - A vulnerability was discovered in the PyYAML library in versions before 5.4, where it is susceptible to     arbitrary code execution when it processes untrusted YAML files through the full_load method or with the     FullLoader loader. Applications that use the library to process untrusted input May be vulnerable to this     flaw. This flaw allows an attacker to execute arbitrary code on the system by abusing the     python/object/new constructor. This flaw is due to an incomplete fix for CVE-2020-1747. (CVE-2020-14343)

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 33 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2021-3342569a0f advisory.

  - A vulnerability was discovered in the PyYAML library in versions before 5.3.1, where it is susceptible to     arbitrary code execution when it processes untrusted YAML files through the full_load method or with the     FullLoader loader. Applications that use the library to process untrusted input may be vulnerable to this     flaw. An attacker could use this flaw to execute arbitrary code on the system by abusing the     python/object/new constructor. (CVE-2020-1747)

  - A vulnerability was discovered in the PyYAML library in versions before 5.4, where it is susceptible to     arbitrary code execution when it processes untrusted YAML files through the full_load method or with the     FullLoader loader. Applications that use the library to process untrusted input may be vulnerable to this     flaw. This flaw allows an attacker to execute arbitrary code on the system by abusing the     python/object/new constructor. This flaw is due to an incomplete fix for CVE-2020-1747. (CVE-2020-14343)

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 32 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2021-eed7193502 advisory.

  - A vulnerability was discovered in the PyYAML library in versions before 5.3.1, where it is susceptible to     arbitrary code execution when it processes untrusted YAML files through the full_load method or with the     FullLoader loader. Applications that use the library to process untrusted input may be vulnerable to this     flaw. An attacker could use this flaw to execute arbitrary code on the system by abusing the     python/object/new constructor. (CVE-2020-1747)

  - A vulnerability was discovered in the PyYAML library in versions before 5.4, where it is susceptible to     arbitrary code execution when it processes untrusted YAML files through the full_load method or with the     FullLoader loader. Applications that use the library to process untrusted input may be vulnerable to this     flaw. This flaw allows an attacker to execute arbitrary code on the system by abusing the     python/object/new constructor. This flaw is due to an incomplete fix for CVE-2020-1747. (CVE-2020-14343)

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	Published	Updated	Severity
156538	EulerOS Virtualization 3.0.2.6 : PyYAML (EulerOS-SA-2021-2902)	Nessus	Huawei Local Security Checks	1/6/2022	1/6/2022	critical
151330	EulerOS Virtualization for ARM 64 3.0.2.0 : PyYAML (EulerOS-SA-2021-2078)	Nessus	Huawei Local Security Checks	7/2/2021	12/11/2023	critical
148626	EulerOS Virtualization 2.9.1 : PyYAML (EulerOS-SA-2021-1723)	Nessus	Huawei Local Security Checks	4/15/2021	1/4/2024	critical
150211	EulerOS 2.0 SP9 : pyyaml (EulerOS-SA-2021-1937)	Nessus	Huawei Local Security Checks	6/3/2021	12/27/2023	critical
149417	Ubuntu 20.04 LTS : PyYAML vulnerability (USN-4940-1)	Nessus	Ubuntu Local Security Checks	5/12/2021	8/28/2024	critical
185499	CBL Mariner 2.0 Security Update: PyYAML (CVE-2020-14343)	Nessus	MarinerOS Local Security Checks	11/13/2023	2/10/2025	critical
145367	Fedora 33 : PyYAML (2021-3342569a0f)	Nessus	Fedora Local Security Checks	1/25/2021	10/15/2021	critical
145763	Fedora 32 : PyYAML (2021-eed7193502)	Nessus	Fedora Local Security Checks	2/1/2021	10/15/2021	critical

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