CVE-2021-41103 - log back

CVE-2021-41103 edited at 04 Oct 2021 21:04:18
Severity
- Unknown
+ Medium
Remote
- Unknown
+ Local
Type
- Unknown
+ Directory traversal
Description
+ A bug was found in containerd where container root directories and some plugins had insufficiently restricted permissions, allowing otherwise unprivileged Linux users to traverse directory contents and execute programs. When containers included executable programs with extended permission bits (such as setuid), unprivileged Linux users could discover and execute those programs. When the UID of an unprivileged Linux user on the host collided with the file owner or group inside a container, the unprivileged Linux user on the host could discover, read, and modify those files.
+
+ This vulnerability has been fixed in containerd 1.4.11 and containerd 1.5.7. Users should update to these version when they are released and may restart containers or update directory permissions to mitigate the vulnerability. Users unable to update should limit access to the host to trusted users. Update directory permission on container bundles directories.
References
+ https://github.com/containerd/containerd/security/advisories/GHSA-c2h3-6mxw-7mvq
+ https://github.com/containerd/containerd/commit/97db45e83d03f735495e899aeebf2069ede728ff
+ https://github.com/containerd/containerd/commit/68119b417e29c5295a5b8b21b3127f0329ce2090
+ https://github.com/containerd/containerd/commit/f95fca0790771dc577997b1b12f56791e7a219b7
Notes
CVE-2021-41103 created at 04 Oct 2021 21:01:11