CVE-2026-55453

Description

OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. Prior to 2.4.20, the backend/ipp.c quote_string() function preserves carriage-return and line-feed characters in a remote printer-controlled marker-message before report_attr() writes the value to the scheduler status stream. The scheduler can parse an injected newline as a separate PPD: control line and persist an attacker-selected PPD keyword. The reporter demonstrated that a later print job on a Foomatic-backed queue could consume an injected FoomaticRIPCommandLine value and execute in the filter context as lp. This issue is fixed in version 2.4.20.

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Produits concernés

• OpenPrinting cups

Scores CVSS

Faiblesses (CWE)

• CWE-74
• CWE-77
• CWE-78

Références

• https://github.com/OpenPrinting/cups/commit/806e1b483096c51d59432468f4afdd7387d81dd7 Patch
• https://github.com/OpenPrinting/cups/commit/d41cf0616688721e9d435d54118c4c8a36ed596a Patch
• https://github.com/OpenPrinting/cups/releases/tag/v2.4.20 Release Notes
• https://github.com/OpenPrinting/cups/security/advisories/GHSA-7hqf-mfhx-7r3v ExploitPatchVendor Advisory

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories