containerd up to 1.5.17/1.6.17 Supplementary Group information disclosure

Summaryinfo

A vulnerability was found in containerd up to 1.5.17/1.6.17. It has been rated as problematic. Impacted is an unknown function of the component Supplementary Group Handler. Performing a manipulation results in information disclosure. This vulnerability was named CVE-2023-25173. The attack needs to be approached locally. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as problematic has been found in containerd up to 1.5.17/1.6.17 (Virtualization Software). This affects an unknown function of the component Supplementary Group Handler. The manipulation with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality. The summary by CVE is:

containerd is an open source container runtime. A bug was found in containerd prior to versions 1.6.18 and 1.5.18 where supplementary groups are not set up properly inside a container. If an attacker has direct access to a container and manipulates their supplementary group access, they may be able to use supplementary group access to bypass primary group restrictions in some cases, potentially gaining access to sensitive information or gaining the ability to execute code in that container. Downstream applications that use the containerd client library may be affected as well. This bug has been fixed in containerd v1.6.18 and v.1.5.18. Users should update to these versions and recreate containers to resolve this issue. Users who rely on a downstream application that uses containerd's client library should check that application for a separate advisory and instructions. As a workaround, ensure that the `"USER $USERNAME"` Dockerfile instruction is not used. Instead, set the container entrypoint to a value similar to `ENTRYPOINT ["su", "-", "user"]` to allow `su` to properly set up supplementary groups.

The weakness was presented 02/16/2023 as GHSA-4wjj-jwc9-2x96. The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2023-25173 since 02/03/2023. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1592 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 211563 (Oracle Linux 9 : buildah (ELSA-2024-9097)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 1.5.18 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 133f6bb6cd827ce35a5fb279c1ead12b9d21460a is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (211563) and CERT Bund (WID-SEC-2023-1141). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

• Amazon Linux 2
• Red Hat Enterprise Linux
• Gentoo Linux
• Red Hat OpenShift
• RESF Rocky Linux

Productinfo

Type

• Virtualization Software

Name

• containerd

Version

• 1.5.0
• 1.5.1
• 1.5.2
• 1.5.3
• 1.5.4
• 1.5.5
• 1.5.6
• 1.5.7
• 1.5.8
• 1.5.9
• 1.5.10
• 1.5.11
• 1.5.12
• 1.5.13
• 1.5.14
• 1.5.15
• 1.5.16
• 1.5.17
• 1.6.0
• 1.6.1
• 1.6.2
• 1.6.3
• 1.6.4
• 1.6.5
• 1.6.6
• 1.6.7
• 1.6.8
• 1.6.9
• 1.6.10
• 1.6.11
• 1.6.12
• 1.6.13
• 1.6.14
• 1.6.15
• 1.6.16
• 1.6.17

License

• open-source

Website

• Product: https://github.com/containerd/containerd/

CPE 2.3info

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CPE 2.2info

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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