CVE-2023-2640

high

Description

On Ubuntu kernels carrying both c914c0e27eb0 and "UBUNTU: SAUCE: overlayfs: Skip permission checking for trusted.overlayfs.* xattrs", an unprivileged user may set privileged extended attributes on the mounted files, leading them to be set on the upper files without the appropriate security checks.

References

https://ubuntu.com/security/notices/USN-6250-1

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-2640

https://securelist.com/exploits-and-vulnerabilities-q3-2024/114839/

https://securelist.com/vulnerability-exploit-report-q2-2024/113455/

https://wiz.io/blog/ubuntu-overlayfs-vulnerability

https://lists.ubuntu.com/archives/kernel-team/2023-July/140923.html

Details

Source: Mitre, NVD

Published: 2023-07-26

Updated: 2023-08-03

Risk Information

CVSS v2

Base Score: 6.8

Vector: CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C

Severity: Medium

CVSS v3

Base Score: 7.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Severity: High

EPSS

EPSS: 0.91919