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CVE-2023-2640

Published: Jul 26, 2023

Modified: Oct 23, 2024

PUBLISHED

CVSS v3.1

7.8

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.

Vendor	Product	Versions
Canonical	Ubuntu Kernel	unaffected `0 - < 6.2.0-26.26` unaffected `0 - < 6.0.0-1020.20` unaffected `0 - < 5.4.0-155.172`

Weaknesses (CWE)

CVSS v3.1 Details

CVSS v3.1 Vector

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

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

References

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

vendor-advisory

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

issue-tracking

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

technical-description

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

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