CVE-2021-32760 log

Severity Medium
Remote No
Type Directory traversal
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.
Group Package Affected Fixed Severity Status Ticket
AVG-2174 containerd 1.5.2-1 1.5.4-1 Medium Fixed
Date Advisory Group Package Severity Type
27 Jul 2021 ASA-202107-70 AVG-2174 containerd Medium directory traversal

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.