Beginning in v1.4.1 and prior to v1.4.9, due to an incomplete fix for CVE-2021-24031, the Zstandard command-line utility created output files with default permissions and restricted those permissions immediately afterwards. Output files could therefore momentarily be readable or writable to unintended parties.

An update of the zstd package has been released.

The remote Ubuntu 16.04 ESM host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-5720-1 advisory.

    It was discovered that Zstandard was not properly managing file permissions when generating output files.
    A local attacker could possibly use this issue to cause a race condition and gain unauthorized access to     sensitive data.

Tenable has extracted the preceding description block directly from the Ubuntu 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 zstd packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - In the Zstandard command-line utility prior to v1.4.1, output files were created with default permissions.
    Correct file permissions (matching the input) would only be set at completion time. Output files could     therefore be readable or writable to unintended parties. (CVE-2021-24031)

  - Beginning in v1.4.1 and prior to v1.4.9, due to an incomplete fix for CVE-2021-24031, the Zstandard     command-line utility created output files with default permissions and restricted those permissions     immediately afterwards. Output files could therefore momentarily be readable or writable to unintended     parties. (CVE-2021-24032)

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

  - In the Zstandard command-line utility prior to v1.4.1, output files were created with default permissions.
    Correct file permissions (matching the input) would only be set at completion time. Output files could     therefore be readable or writable to unintended parties. (CVE-2021-24031)

  - Beginning in v1.4.1 and prior to v1.4.9, due to an incomplete fix for CVE-2021-24031, the Zstandard     command-line utility created output files with default permissions and restricted those permissions     immediately afterwards. Output files could therefore momentarily be readable or writable to unintended     parties. (CVE-2021-24032)

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 versions of the zstd package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - Beginning in v1.4.1 and prior to v1.4.9, due to an     incomplete fix for CVE-2021-24031, the Zstandard     command-line utility created output files with default     permissions and restricted those permissions     immediately afterwards. Output files could therefore     momentarily be readable or writable to unintended     parties.(CVE-2021-24032)

  - In the Zstandard command-line utility prior to v1.4.1,     output files were created with default permissions.
    Correct file permissions (matching the input) would     only be set at completion time. Output files could     therefore be readable or writable to unintended     parties.(CVE-2021-24031)

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

  - Beginning in v1.4.1 and prior to v1.4.9, due to an     incomplete fix for CVE-2021-24031, the Zstandard     command-line utility created output files with default     permissions and restricted those permissions     immediately afterwards. Output files could therefore     momentarily be readable or writable to unintended     parties.(CVE-2021-24032)

  - In the Zstandard command-line utility prior to v1.4.1,     output files were created with default permissions.
    Correct file permissions (matching the input) would     only be set at completion time. Output files could     therefore be readable or writable to unintended     parties.(CVE-2021-24031)

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.

This update for zstd fixes the following issues :

  - CVE-2021-24031: Added read permissions to files while     being compressed or uncompressed (bsc#1183371).

  - CVE-2021-24032: Fixed a race condition which could have     allowed an attacker to access world-readable destination     file (bsc#1183370).

This update was imported from the SUSE:SLE-15:Update update project.

This update for zstd fixes the following issues :

CVE-2021-24031: Added read permissions to files while being compressed or uncompressed (bsc#1183371).

CVE-2021-24032: Fixed a race condition which could have allowed an attacker to access world-readable destination file (bsc#1183370).

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

The remote Ubuntu 18.04 LTS / 20.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-4760-1 advisory.

    It was discovered that libzstd incorrectly handled file permissions. A local attacker could possibly use     this issue to access certain files, contrary to expectations.

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

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

ID	Name	Product	Family	Severity
204688	Photon OS 3.0: Zstd PHSA-2022-3.0-0431	Nessus	PhotonOS Local Security Checks	medium
203449	Photon OS 4.0: Zstd PHSA-2022-4.0-0235	Nessus	PhotonOS Local Security Checks	medium
167229	Ubuntu 16.04 ESM : Zstandard vulnerabilities (USN-5720-1)	Nessus	Ubuntu Local Security Checks	medium
157942	EulerOS Virtualization 3.0.6.0 : zstd (EulerOS-SA-2022-1104)	Nessus	Huawei Local Security Checks	medium
153647	EulerOS 2.0 SP8 : zstd (EulerOS-SA-2021-2490)	Nessus	Huawei Local Security Checks	medium
152345	EulerOS 2.0 SP9 : zstd (EulerOS-SA-2021-2260)	Nessus	Huawei Local Security Checks	medium
152298	EulerOS 2.0 SP9 : zstd (EulerOS-SA-2021-2286)	Nessus	Huawei Local Security Checks	medium
151544	EulerOS Virtualization 2.9.1 : zstd (EulerOS-SA-2021-2177)	Nessus	Huawei Local Security Checks	medium
151540	EulerOS Virtualization 2.9.0 : zstd (EulerOS-SA-2021-2201)	Nessus	Huawei Local Security Checks	medium
148209	openSUSE Security Update : zstd (openSUSE-2021-481)	Nessus	SuSE Local Security Checks	medium
148155	SUSE SLED15 / SLES15 Security Update : zstd (SUSE-SU-2021:0948-1)	Nessus	SuSE Local Security Checks	medium
148007	Ubuntu 18.04 LTS / 20.04 LTS : libzstd vulnerabilities (USN-4760-1)	Nessus	Ubuntu Local Security Checks	medium

Detections

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CVE-2021-24032

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Tenable Plugins

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