lppasswd in CUPS before 1.7.1, when running with setuid privileges, allows local users to read portions of arbitrary files via a modified HOME environment variable and a symlink attack involving .cups/client.conf.
CUPS 1.4.4, when running in certain Linux distributions such as Debian GNU/Linux, stores the web interface administrator key in /var/run/cups/certs/0 using certain permissions, which allows local users in the lpadmin group to read or write arbitrary files as root by leveraging the web interface.
The LZW decompressor in the LWZReadByte function in giftoppm.c in the David Koblas GIF decoder in PBMPLUS, as used in the gif_read_lzw function in filter/image-gif.c in CUPS before 1.4.7, the LZWReadByte function in plug-ins/common/file-gif-load.c in GIMP 2.6.11 and earlier, the LZWReadByte function in img/gifread.c in XPCE in SWI-Prolog 5.10.4 and earlier, and other products, does not properly handle code words that are absent from the decompression table when encountered, which allows remote attackers to trigger an infinite loop or a heap-based buffer overflow, and possibly execute arbitrary code, via a crafted compressed stream, a related issue to CVE-2006-1168 and CVE-2011-2895.
The gif_read_lzw function in filter/image-gif.c in CUPS 1.4.8 and earlier does not properly handle the first code word in an LZW stream, which allows remote attackers to trigger a heap-based buffer overflow, and possibly execute arbitrary code, via a crafted stream, a different vulnerability than CVE-2011-2896.
ipp.c in cupsd in CUPS 1.4.4 and earlier does not properly allocate memory for attribute values with invalid string data types, which allows remote attackers to cause a denial of service (use-after-free and application crash) or possibly execute arbitrary code via a crafted IPP request.
CUPS on Mandriva Linux 2008.0, 2008.1, 2009.0, Corporate Server (CS) 3.0 and 4.0, and Multi Network Firewall (MNF) 2.0 allows local users to overwrite arbitrary files via a symlink attack on the /tmp/pdf.log temporary file.
The scheduler in CUPS in Apple Mac OS X 10.5 before 10.5.3, when debug logging is enabled and a printer requires a password, allows attackers to obtain sensitive information (credentials) by reading the log data, related to "authentication environment variables."