CVE-2008-3903 Information

Description

Asterisk Open Source 1.2.x before 1.2.32 1.4.x before 1.4.24.1 and 1.6.0.x before 1.6.0.8; Asterisk Business Edition A.x.x B.x.x before B.2.5.8 C.1.x.x before C.1.10.5 and C.2.x.x before C.2.3.3; s800i 1.3.x before 1.3.0.2; and Trixbox PBX 2.6.1 when Digest authentication and authalwaysreject are enabled generates different responses depending on whether a SIP username is valid which allows remote attackers to enumerate valid usernames.

Reference

http://downloads.asterisk.org/pub/security/AST-2009-003.html http://misel.com/?p=52 http://secunia.com/advisories/34982 http://secunia.com/advisories/37677 http://security.gentoo.org/glsa/glsa-200905-01.xml http://www.debian.org/security/2009/dsa-1952 http://www.securityfocus.com/bid/34353 http://www.vupen.com/english/advisories/2009/0933 https://exchange.xforce.ibmcloud.com/vulnerabilities/45059