Permissions, Privileges, and Access Controls in linux-image-6.2.0-1006-ibm (Ubuntu package) - CVE-2023-2640

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Main Vulnerability Database Vulnerabilities #VU78673

Permissions, Privileges, and Access Controls in linux-image-6.2.0-1006-ibm (Ubuntu package) - CVE-2023-2640

Published: July 26, 2023 / Updated: December 18, 2024


Vulnerability identifier: #VU78673
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Clear
CVE-ID: CVE-2023-2640
CWE-ID: CWE-264
Exploitation vector: Local access
Exploit availability: Public exploit is available
Vendor: Canonical Ltd.
Affected software:
linux-image-6.2.0-1006-ibm (Ubuntu package)

Detailed vulnerability description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to missing permission checks for trusted.overlayfs.* xattrs". A local user can set privileged extended attributes on the mounted files, leading them to be set on the upper files without the appropriate security checks.


How to mitigate CVE-2023-2640

Install updates from vendor's website.

Sources