- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200905-01 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: Asterisk: Multiple vulnerabilities Date: May 02, 2009 Bugs: #218966, #224835, #232696, #232698, #237476, #250748, #254304 ID: 200905-01 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== Multiple vulnerabilities have been found in Asterisk allowing for Denial of Service and username disclosure. Background ========== Asterisk is an open source telephony engine and toolkit. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-misc/asterisk < 1.2.32 >= 1.2.32 Description =========== Multiple vulnerabilities have been discovered in the IAX2 channel driver when performing the 3-way handshake (CVE-2008-1897), when handling a large number of POKE requests (CVE-2008-3263), when handling authentication attempts (CVE-2008-5558) and when handling firmware download (FWDOWNL) requests (CVE-2008-3264). Asterisk does also not correctly handle SIP INVITE messages that lack a "From" header (CVE-2008-2119), and responds differently to a failed login attempt depending on whether the user account exists (CVE-2008-3903, CVE-2009-0041). Impact ====== Remote unauthenticated attackers could send specially crafted data to Asterisk, possibly resulting in a Denial of Service via a daemon crash, call-number exhaustion, CPU or traffic consumption. Remote unauthenticated attackers could furthermore enumerate valid usernames to facilitate brute force login attempts. 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-1.2.32" References ========== [ 1 ] CVE-2008-1897 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1897 [ 2 ] CVE-2008-2119 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2119 [ 3 ] CVE-2008-3263 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3263 [ 4 ] CVE-2008-3264 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3264 [ 5 ] CVE-2008-3903 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3903 [ 6 ] CVE-2008-5558 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-5558 [ 7 ] CVE-2009-0041 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0041 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200905-01.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 security@xxxxxxxxxx or alternatively, you may file a bug at http://bugs.gentoo.org. License ======= Copyright 2009 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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