Amazon Linux 1 Security Advisory: ALAS-2021-1540
Advisory Release Date: 2021-10-01 17:58 Pacific
Advisory Updated Date: 2021-10-04 22:13 Pacific
Severity:
Medium
Issue Overview:
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. (CVE-2021-41103)
Affected Packages:
containerd
Issue Correction:
Run yum update containerd to update your system.
New Packages:
src:
containerd-1.4.6-3.9.amzn1.src
x86_64:
containerd-stress-1.4.6-3.9.amzn1.x86_64
containerd-debuginfo-1.4.6-3.9.amzn1.x86_64
containerd-1.4.6-3.9.amzn1.x86_64