Red Hat Security Advisory 2011-1635-03 - The Common UNIX Printing System provides a portable printing layer for UNIX operating systems. A heap-based buffer overflow flaw was found in the Lempel-Ziv-Welch decompression algorithm implementation used by the CUPS GIF image format reader. An attacker could create a malicious GIF image file that, when printed, could possibly cause CUPS to crash or, potentially, execute arbitrary code with the privileges of the "lp" user.
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