Remote code execution in OpenPrinting CUPS

1) Off-by-one

EUVDB-ID: #VU80932

Risk: High

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2023-4504

CWE-ID: CWE-193 - Off-by-one Error

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to an off-by-one error when parsing Postscript objects within the scan_ps() function in cups/raster-interpret.c. A remote attacker can trigger pass a specially crafted PPD file to the affected application, trigger a heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

cups: 2.2.0 - 2.4.6

CPE2.3

• cpe:2.3:a:OpenPrinting:cups:2.2.0:*:*:*:*:*:*:*
• cpe:2.3:a:OpenPrinting:cups:2.2.1:*:*:*:*:*:*:*
• cpe:2.3:a:OpenPrinting:cups:2.2.2:*:*:*:*:*:*:*

External links

https://seclists.org/oss-sec/2023/q3/198
https://github.com/OpenPrinting/cups/commit/2431caddb7e6
https://takeonme.org/cves/CVE-2023-4504.html
https://github.com/OpenPrinting/cups/releases/tag/v2.4.7

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.