CVE-2021-32760

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 hosts 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.

Risk Information

Base Score

6.3

MODERATE

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

EPSS Score

Exploitation Probability

0.071

Associated Vulnerability

Vulnerability	OS Platform
daemon to control runC (USN-5012-1) containerd_1.5.2-0ubuntu1~18.04.2_i386.deb	Linux
daemon to control runC (USN-5012-1) containerd_1.5.2-0ubuntu1~18.04.2_amd64.deb	Linux
daemon to control runC (USN-5012-1) containerd_1.5.2-0ubuntu1~20.04.2_amd64.deb	Linux
daemon to control runC (USN-5012-1) containerd_1.5.2-0ubuntu1~20.10.2_amd64.deb	Linux
daemon to control runC (USN-5012-1) containerd_1.5.2-0ubuntu1~21.04.2_amd64.deb	Linux
Containerd update (ELSA-2021-9373) containerd-1.4.8-1.el7.x86_64.rpm	Linux
Docker-cli update (ELSA-2021-9373) docker-cli-19.03.11.ol-13.el7.x86_64.rpm	Linux
Docker-engine update (ELSA-2021-9373) docker-engine-19.03.11.ol-13.el7.x86_64.rpm	Linux
Containerd update (ELSA-2021-15790) containerd-1.4.8-1.el7.x86_64.rpm	Linux
Docker-cli update (ELSA-2021-15790) docker-cli-19.03.11.ol-13.el7.x86_64.rpm	Linux
Docker-engine update (ELSA-2021-15790) docker-engine-19.03.11.ol-13.el7.x86_64.rpm	Linux

Patch Details

No records found

References

https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234