OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. Prior to version 2.4.15, a user in the lpadmin group can use the cups web ui to change the config and insert a malicious line. Then the cupsd process which runs as root will parse the new config and cause an out-of-bound write. This issue has been patched in version 2.4.15.
Weakness
The product writes to a buffer using an index or pointer that references a memory location prior to the beginning of the buffer.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Cups | Openprinting | * | 2.4.15 (excluding) |
| Red Hat Enterprise Linux 10 | RedHat | cups-1:2.4.10-12.el10_1.2 | * |
| Red Hat Enterprise Linux 8 | RedHat | cups-1:2.2.6-66.el8_10 | * |
| Red Hat Enterprise Linux 8 | RedHat | cups-1:2.2.6-66.el8_10 | * |
| Red Hat Enterprise Linux 9 | RedHat | cups-1:2.3.3op2-34.el9_7.2 | * |
| Red Hat Enterprise Linux 9 | RedHat | cups-1:2.3.3op2-34.el9_7.2 | * |
| Cups | Ubuntu | devel | * |
| Cups | Ubuntu | esm-infra/bionic | * |
| Cups | Ubuntu | esm-infra/focal | * |
| Cups | Ubuntu | esm-infra/xenial | * |
| Cups | Ubuntu | jammy | * |
| Cups | Ubuntu | noble | * |
| Cups | Ubuntu | plucky | * |
| Cups | Ubuntu | questing | * |
| Cups | Ubuntu | upstream | * |
Potential Mitigations
References
- https://github.com/OpenPrinting/cups/commit/db8d560262c22a21ee1e55dfd62fa98d9359bcb0
- https://github.com/OpenPrinting/cups/releases/tag/v2.4.15
- https://github.com/OpenPrinting/cups/security/advisories/GHSA-hxm8-vfpq-jrfc
- http://www.openwall.com/lists/oss-security/2025/11/27/5
- https://github.com/OpenPrinting/cups/security/advisories/GHSA-hxm8-vfpq-jrfc