CVE-2011-4137 Information

Description

The verify_exists functionality in the URLField implementation in Django before 1.2.7 and 1.3.x before 1.3.1 relies on Python libraries that attempt access to an arbitrary URL with no timeout which allows remote attackers to cause a denial of service (resource consumption) via a URL associated with (1) a slow response (2) a completed TCP connection with no application data sent or (3) a large amount of application data a related issue to CVE-2011-1521.

Reference

http://openwall.com/lists/oss-security/2011/09/11/1 http://openwall.com/lists/oss-security/2011/09/13/2 http://openwall.com/lists/oss-security/2011/09/15/5 http://secunia.com/advisories/46614 http://www.debian.org/security/2011/dsa-2332 https://bugzilla.redhat.com/show_bug.cgi?id=737366 https://hermes.opensuse.org/messages/14700881 https://www.djangoproject.com/weblog/2011/sep/09/ https://www.djangoproject.com/weblog/2011/sep/10/127/