UNIX symbolic link following in cups - CVE-2024-35235
Published: June 13, 2024 / Updated: February 7, 2025
Vulnerability identifier: #VU92075
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:P/U:Clear
CVE-ID: CVE-2024-35235
CWE-ID: CWE-61
Exploitation vector: Local access
Exploit availability:
Public exploit is available
Vendor: OpenPrinting
Affected software:
cups
cups
Detailed vulnerability description
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a symlink following issue. A local user can create a specially crafted symbolic link to a critical file on the system and make it world-writable.
Successful exploitation of this vulnerability may result in privilege escalation.
How to mitigate CVE-2024-35235
Install updates from vendor's website.
Sources
- https://github.com/OpenPrinting/cups/security/advisories/GHSA-vvwp-mv6j-hw6f
- https://github.com/OpenPrinting/cups/commit/ff1f8a623e090dee8a8aadf12a6a4b25efac143d
- https://git.launchpad.net/ubuntu/+source/apparmor/tree/profiles/apparmor.d/abstractions/user-tmp#n21
- https://github.com/OpenPrinting/cups/blob/aba917003c8de55e5bf85010f0ecf1f1ddd1408e/cups/http-addr.c#L229-L240
- http://www.openwall.com/lists/oss-security/2024/06/11/1
- http://www.openwall.com/lists/oss-security/2024/06/12/4
- http://www.openwall.com/lists/oss-security/2024/06/12/5
- https://github.com/OpenPrinting/cups/releases/tag/v2.4.9