CVE-2021-32760 - log back

CVE-2021-32760 edited at 20 Jul 2021 08:03:50
Type
- Incorrect calculation
+ Directory traversal
CVE-2021-32760 edited at 20 Jul 2021 08:02:26
Severity
- Unknown
+ Medium
Remote
- Unknown
+ Local
Type
- Unknown
+ Incorrect calculation
Description
+ A bug was found in containerd version prior to 1.5.4 where pulling and extracting a specially-crafted container image can result in Unix file permission changes for existing files in the host's filesystem. Changes to file permissions can deny access to the expected owner of the file, widen access to others, or set extended bits like setuid, setgid, and sticky. This bug does not directly allow files to be read, modified, or executed without an additional cooperating process.
References
+ https://github.com/containerd/containerd/security/advisories/GHSA-c72p-9xmj-rx3w
+ https://github.com/containerd/containerd/commit/37a44de17d5d09e258e3c8c29d32ae99797e7c11
Notes
+ Workaround
+ ==========
+
+ As a workaround, ensure that users only pull images from trusted sources. Linux security modules (LSMs) like SELinux and AppArmor can limit the files potentially affected by this bug through policies and profiles that prevent containerd from interacting with specific files.
CVE-2021-32760 created at 20 Jul 2021 07:57:50