CVEvulnerability

CVE-2021-32760

6.3 MEDIUM Published 2021-07-19 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2021-07-19
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
5.0 MEDIUM — CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L
CVSS 3.1 ([email protected])
6.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
CVSS 2.0 ([email protected])
6.8 MEDIUM — AV:N/AC:M/Au:N/C:P/I:P/A:P
Weaknesses
CWE-668, CWE-732

Description

containerd is a container runtime. A bug was found in containerd versions prior to 1.4.8 and 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. This bug has been fixed in containerd 1.5.4 and 1.4.8. 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.

Affected configurations

• linuxfoundation containerd (< 1.4.8) • linuxfoundation containerd (>= 1.5.0 < 1.5.4) • fedoraproject fedora 34

Related

Weakness · CWE (2)

  • CWE-668 Exposure of Resource to Wrong Sphere weakness
  • CWE-732 Incorrect Permission Assignment for Critical Resource weakness

References