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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2021-43816 Detail

Description

containerd is an open source container runtime. On installations using SELinux, such as EL8 (CentOS, RHEL), Fedora, or SUSE MicroOS, with containerd since v1.5.0-beta.0 as the backing container runtime interface (CRI), an unprivileged pod scheduled to the node may bind mount, via hostPath volume, any privileged, regular file on disk for complete read/write access (sans delete). Such is achieved by placing the in-container location of the hostPath volume mount at either `/etc/hosts`, `/etc/hostname`, or `/etc/resolv.conf`. These locations are being relabeled indiscriminately to match the container process-label which effectively elevates permissions for savvy containers that would not normally be able to access privileged host files. This issue has been resolved in version 1.5.9. Users are advised to upgrade as soon as possible.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://github.com/containerd/containerd/commit/a731039238c62be081eb8c31525b988415745eea Patch  Third Party Advisory 
https://github.com/containerd/containerd/commit/a731039238c62be081eb8c31525b988415745eea Patch  Third Party Advisory 
https://github.com/containerd/containerd/issues/6194 Exploit  Issue Tracking  Third Party Advisory 
https://github.com/containerd/containerd/issues/6194 Exploit  Issue Tracking  Third Party Advisory 
https://github.com/containerd/containerd/security/advisories/GHSA-mvff-h3cj-wj9c Third Party Advisory 
https://github.com/containerd/containerd/security/advisories/GHSA-mvff-h3cj-wj9c Third Party Advisory 
https://github.com/dweomer/containerd/commit/f7f08f0e34fb97392b0d382e58916d6865100299 Patch  Third Party Advisory 
https://github.com/dweomer/containerd/commit/f7f08f0e34fb97392b0d382e58916d6865100299 Patch  Third Party Advisory 
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GD5GH7NMK5VJMA2Y5CYB5O5GTPYMWMLX/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GD5GH7NMK5VJMA2Y5CYB5O5GTPYMWMLX/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MPDIZMI7ZPERSZE2XO265UCK5IWM7CID/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MPDIZMI7ZPERSZE2XO265UCK5IWM7CID/

Weakness Enumeration

CWE-ID CWE Name Source
CWE-281 Improper Preservation of Permissions cwe source acceptance level NIST   GitHub, Inc.  

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Change History

6 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2021-43816
NVD Published Date:
01/05/2022
NVD Last Modified:
11/21/2024
Source:
GitHub, Inc.