9.1

CVE-2021-43816

Exploit

Improper Preservation of Permissions in containerd

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linuxfoundation ≫ Containerd Version >= 1.5.1 < 1.5.9
Linuxfoundation ≫ Containerd Version 1.5.0 Update -
Linuxfoundation ≫ Containerd Version 1.5.0 Update beta0
Linuxfoundation ≫ Containerd Version 1.5.0 Update beta1
Linuxfoundation ≫ Containerd Version 1.5.0 Update beta2
Linuxfoundation ≫ Containerd Version 1.5.0 Update beta3
Linuxfoundation ≫ Containerd Version 1.5.0 Update beta4
Linuxfoundation ≫ Containerd Version 1.5.0 Update rc0
Linuxfoundation ≫ Containerd Version 1.5.0 Update rc1
Linuxfoundation ≫ Containerd Version 1.5.0 Update rc2
Linuxfoundation ≫ Containerd Version 1.5.0 Update rc3
Fedoraproject ≫ Fedora Version 34
Fedoraproject ≫ Fedora Version 35
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 1.68% 0.75
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
NIST 9.1 2.3 6
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
NIST 6 6.8 6.4
AV:N/AC:M/Au:S/C:P/I:P/A:P
security-advisories@github.com 8 1.3 6
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
CWE-281 Improper Preservation of Permissions

The product does not preserve permissions or incorrectly preserves permissions when copying, restoring, or sharing objects, which can cause them to have less restrictive permissions than intended.

https://github.com/containerd/containerd/commit/a731039238c62be081eb8c31525b988415745eea
Patch
Third Party Advisory
https://github.com/containerd/containerd/issues/6194
Third Party Advisory
Exploit
Issue Tracking
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://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/