OpenPrinting CUPS Remote Code Execution: What You Should Know
This exploit chain in the OpenPrinting CUPS ecosystem combines four separate vulnerabilities — a network-exposure flaw in cups-browsed, unsanitized-attribute flaws in libcupsfilters and l...
CUPS (Common Unix Printing System) is a collection of tools used to manage printers and print jobs in a standardized way across Unix and Linux systems. It allows a machine to act as a print server: accepting print jobs from clients, processing them, and dispatching them to a physical or virtual printer. Functionally, it plays a role similar to the print spooler service on Windows.
Because print-related packages from the OpenPrinting/CUPS ecosystem ship installed by default on many Linux distributions — Debian being a particularly well-known example — a vulnerability in these components has broad reach across the Linux server and desktop landscape, even though CUPS is not tied to any single distribution.
Under specific conditions, these vulnerabilities can be chained together to achieve arbitrary remote code execution, with the initial network exposure occurring over UDP port 631.
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What's inside
3 sections- 1 Table of Contents
- 2 Module 1: The OpenPrinting CUPS Remote Code Execution Exploit Chain
- 3 Summary
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