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CVE-2011-2536

Status Candidate

Overview

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.

Related Files

Gentoo Linux Security Advisory 201110-21
Posted Oct 25, 2011
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 201110-21 - Multiple vulnerabilities in Asterisk might allow unauthenticated remote attackers to execute arbitrary code. Versions less than 1.8.7.1 are affected.

tags | advisory, remote, arbitrary, vulnerability
systems | linux, gentoo
advisories | CVE-2011-1147, CVE-2011-1174, CVE-2011-1175, CVE-2011-1507, CVE-2011-1599, CVE-2011-2529, CVE-2011-2535, CVE-2011-2536, CVE-2011-2665, CVE-2011-2666, CVE-2011-4063
SHA-256 | ae5d5c2b8906b69d1e116e6371311677f87ac873f436e84744aa53590ae850cd
Asterisk Project Security Advisory - AST-2011-011
Posted Jun 29, 2011
Authored by Terry Wilson | Site asterisk.org

Asterisk Project Security Advisory - Asterisk may respond differently to SIP requests from an invalid SIP user than it does to a user configured on the system, even when the alwaysauthreject option is set in the configuration. This can leak information about what SIP users are valid on the Asterisk system.

tags | advisory
advisories | CVE-2011-2536
SHA-256 | 5b60a5f0651dd793f221422ae84407ad379322998ba39d3b47a0a855e825710d
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