Buffer underflow in the rgbimg module in Python 2.5 allows remote attackers to cause a denial of service (application crash) via a large ZSIZE value in a black-and-white (aka B/W) RGB image that triggers an invalid pointer dereference.

References

• https://nvd.nist.gov/vuln/detail/CVE-2009-4134
• https://bugzilla.redhat.com/show_bug.cgi?id=541698
• http://bugs.python.org/issue8678
• http://lists.apple.com/archives/security-announce/2010//Nov/msg00000.html
• http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00006.html
• http://secunia.com/advisories/42888
• http://secunia.com/advisories/43068
• http://secunia.com/advisories/43364
• http://support.apple.com/kb/HT4435
• http://www.mandriva.com/security/advisories?name=MDVSA-2010:215
• http://www.redhat.com/support/errata/RHSA-2011-0027.html
• http://www.redhat.com/support/errata/RHSA-2011-0260.html
• http://www.securityfocus.com/bid/40361
• http://www.vupen.com/english/advisories/2011/0122
• http://www.vupen.com/english/advisories/2011/0212
• http://www.vupen.com/english/advisories/2011/0413