- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200704-01 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Severity: Normal Title: Asterisk: Two SIP Denial of Service vulnerabilities Date: April 02, 2007 Bugs: #171467 ID: 200704-01 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== Asterisk is vulnerable to two Denial of Service issues in the SIP channel. Background ========== Asterisk is an open source implementation of a telephone private branch exchange (PBX). Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-misc/asterisk < 1.2.14-r2 >= 1.2.14-r2 *>= 1.0.12-r2 Description =========== The Madynes research team at INRIA has discovered that Asterisk contains a null pointer dereferencing error in the SIP channel when handling INVITE messages. Furthermore qwerty1979 discovered that Asterisk 1.2.x fails to properly handle SIP responses with return code 0. Impact ====== A remote attacker could cause an Asterisk server listening for SIP messages to crash by sending a specially crafted SIP message or answering with a 0 return code. Workaround ========== There is no known workaround at this time. Resolution ========== All Asterisk users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose net-misc/asterisk Note: Asterisk 1.0.x is no longer supported upstream so users should consider upgrading to Asterisk 1.2.x. References ========== [ 1 ] CVE-2007-1561 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-1561 [ 2 ] CVE-2007-1594 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-1594 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200704-01.xml Concerns? ========= Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to [EMAIL PROTECTED] or alternatively, you may file a bug at http://bugs.gentoo.org. License ======= Copyright 2007 Gentoo Foundation, Inc; referenced text belongs to its owner(s). The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license. http://creativecommons.org/licenses/by-sa/2.5
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