CVE-2021-43816
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/containerd/containerdGo | >= 1.5.0, < 1.5.9 | 1.5.9 |
Affected products
15cpe:2.3:a:linuxfoundation:containerd:*:*:*:*:*:*:*:*+ 10 more
- cpe:2.3:a:linuxfoundation:containerd:*:*:*:*:*:*:*:*range: >=1.5.1,<1.5.9
- cpe:2.3:a:linuxfoundation:containerd:1.5.0:-:*:*:*:*:*:*
- cpe:2.3:a:linuxfoundation:containerd:1.5.0:beta0:*:*:*:*:*:*
- cpe:2.3:a:linuxfoundation:containerd:1.5.0:beta1:*:*:*:*:*:*
- cpe:2.3:a:linuxfoundation:containerd:1.5.0:beta2:*:*:*:*:*:*
- cpe:2.3:a:linuxfoundation:containerd:1.5.0:beta3:*:*:*:*:*:*
- cpe:2.3:a:linuxfoundation:containerd:1.5.0:beta4:*:*:*:*:*:*
- cpe:2.3:a:linuxfoundation:containerd:1.5.0:rc0:*:*:*:*:*:*
- cpe:2.3:a:linuxfoundation:containerd:1.5.0:rc1:*:*:*:*:*:*
- cpe:2.3:a:linuxfoundation:containerd:1.5.0:rc2:*:*:*:*:*:*
- cpe:2.3:a:linuxfoundation:containerd:1.5.0:rc3:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
- Range: >= 1.5.0, < 1.5.9
Patches
Vulnerability mechanics
References
10- github.com/containerd/containerd/commit/a731039238c62be081eb8c31525b988415745eeanvdPatchThird Party AdvisoryWEB
- github.com/dweomer/containerd/commit/f7f08f0e34fb97392b0d382e58916d6865100299nvdPatchThird Party AdvisoryWEB
- github.com/containerd/containerd/issues/6194nvdExploitIssue TrackingThird Party AdvisoryWEB
- github.com/advisories/GHSA-mvff-h3cj-wj9cghsaADVISORY
- github.com/containerd/containerd/security/advisories/GHSA-mvff-h3cj-wj9cnvdThird Party AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2021-43816ghsaADVISORY
- lists.fedoraproject.org/archives/list/[email protected]/message/GD5GH7NMK5VJMA2Y5CYB5O5GTPYMWMLXghsaWEB
- lists.fedoraproject.org/archives/list/[email protected]/message/MPDIZMI7ZPERSZE2XO265UCK5IWM7CIDghsaWEB
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GD5GH7NMK5VJMA2Y5CYB5O5GTPYMWMLX/nvd
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MPDIZMI7ZPERSZE2XO265UCK5IWM7CID/nvd
News mentions
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