CVE-2026-55453

01/תיאור (מקור, אנגלית)

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.

02/מוצרים מושפעים

openprinting: cups

03/קישורים4

• github.com/OpenPrinting/cups/security/advisories/GHSA-7hqf-mfh‮… ExploitPatchVendor Advisory
• github.com/OpenPrinting/cups/commit/806e1b483096c51d59432468f4‮… Patch
• github.com/OpenPrinting/cups/commit/d41cf0616688721e9d435d5411‮… Patch
• github.com/OpenPrinting/cups/releases/tag/v2.4.20 Release Notes