CVE-2009-0871 Information

Description

The SIP channel driver in Asterisk Open Source 1.4.22 1.4.23 and 1.4.23.1; 1.6.0 before 1.6.0.6; 1.6.1 before 1.6.1.0-rc2; and Asterisk Business Edition C.2.3 with the pedantic option enabled allows remote authenticated users to cause a denial of service (crash) via a SIP INVITE request without any headers which triggers a NULL pointer dereference in the (1) sip_uri_headers_cmp and (2) sip_uri_params_cmp functions.

Reference

http://bugs.digium.com/view.php?id=13547 http://bugs.digium.com/view.php?id=14417 http://downloads.digium.com/pub/security/AST-2009-002.html http://osvdb.org/52568 http://secunia.com/advisories/34229 http://www.securityfocus.com/archive/1/501656/100/0/threaded http://www.securityfocus.com/bid/34070 http://www.securitytracker.com/id?1021834 http://www.vupen.com/english/advisories/2009/0667