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CVE-2011-2536

Published: 6 July 2011

chan_sip.c in the SIP channel driver in Asterisk Open Source 1.4.x before 1.4.41.2, 1.6.2.x before 1.6.2.18.2, and 1.8.x before 1.8.4.4, and Asterisk Business Edition C.3.x before C.3.7.3, disregards the alwaysauthreject option and generates different responses for invalid SIP requests depending on whether the user account exists, which allows remote attackers to enumerate account names via a series of requests.

Priority

Low

Status

Package Release Status
asterisk
Launchpad, Ubuntu, Debian
hardy Ignored
(end of life)
lucid
Released (1:1.6.2.5-0ubuntu1.4)
maverick
Released (1:1.6.2.7-1ubuntu1.2)
natty
Released (1:1.6.2.9-2ubuntu2.1)
oneiric Not vulnerable
(1:1.8.4.4~dfsg-2ubuntu1.1)
precise Not vulnerable

quantal Not vulnerable

upstream
Released (1.6.2.18.2, 1.8.4.4)
Patches:
upstream: http://downloads.asterisk.org/pub/security/AST-2011-011-1.6.2.diff
upstream: http://downloads.asterisk.org/pub/security/AST-2011-011-1.8.diff