The ippReadIO function in cups/ipp.c in cupsd in CUPS before 1.3.10 does not properly initialize memory for IPP request packets, which allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a scheduler request with two consecutive IPP_TAG_UNSUPPORTED tags.

References

• https://nvd.nist.gov/vuln/detail/CVE-2009-0949
• https://bugzilla.redhat.com/show_bug.cgi?id=500972
• https://exchange.xforce.ibmcloud.com/vulnerabilities/50926
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9631
• http://lists.apple.com/archives/security-announce/2009/Sep/msg00004.html
• http://lists.opensuse.org/opensuse-security-announce/2009-07/msg00002.html
• http://secunia.com/advisories/35322
• http://secunia.com/advisories/35328
• http://secunia.com/advisories/35340
• http://secunia.com/advisories/35342
• http://secunia.com/advisories/35685
• http://secunia.com/advisories/36701
• http://securitytracker.com/id?1022321
• http://support.apple.com/kb/HT3865
• http://www.coresecurity.com/content/AppleCUPS-null-pointer-vulnerability
• http://www.debian.org/security/2009/dsa-1811
• http://www.redhat.com/support/errata/RHSA-2009-1082.html
• http://www.redhat.com/support/errata/RHSA-2009-1083.html
• http://www.securityfocus.com/archive/1/504032/100/0/threaded
• http://www.securityfocus.com/bid/35169
• http://www.ubuntu.com/usn/USN-780-1