CVE - CVE-2021-43816

CVE-ID
CVE-2021-43816	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
CONFIRM:https://github.com/containerd/containerd/security/advisories/GHSA-mvff-h3cj-wj9c URL:https://github.com/containerd/containerd/security/advisories/GHSA-mvff-h3cj-wj9c FEDORA:FEDORA-2022-a0b2a4d594 URL:https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MPDIZMI7ZPERSZE2XO265UCK5IWM7CID/ FEDORA:FEDORA-2022-f668c3d70d URL:https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GD5GH7NMK5VJMA2Y5CYB5O5GTPYMWMLX/ MISC:https://github.com/containerd/containerd/commit/a731039238c62be081eb8c31525b988415745eea URL:https://github.com/containerd/containerd/commit/a731039238c62be081eb8c31525b988415745eea MISC:https://github.com/containerd/containerd/issues/6194 URL:https://github.com/containerd/containerd/issues/6194 MISC:https://github.com/dweomer/containerd/commit/f7f08f0e34fb97392b0d382e58916d6865100299 URL:https://github.com/dweomer/containerd/commit/f7f08f0e34fb97392b0d382e58916d6865100299
Assigning CNA
GitHub (maintainer security advisories)
Date Record Created
20211116	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20211116)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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