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Gentoo Asterisk Advisory: GLSA-202101-12 Normal Threat for DoS

Multiple vulnerabilities have been found in Asterisk allowing for Denial of Service and username disclosure.. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200905-01 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - https://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 trafficconsumption. 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 https://www.cve.org/CVERecord?id=CVE-2008-1897 [ 2 ] CVE-2008-2119 https://www.cve.org/CVERecord?id=CVE-2008-2119 [ 3 ] CVE-2008-3263 https://www.cve.org/CVERecord?id=CVE-2008-3263 [ 4 ] CVE-2008-3264 https://www.cve.org/CVERecord?id=CVE-2008-3264 [ 5 ] CVE-2008-3903 https://www.cve.org/CVERecord?id=CVE-2008-3903 [ 6 ] CVE-2008-5558 https://www.cve.org/CVERecord?id=CVE-2008-5558 [ 7 ] CVE-2009-0041 https://www.cve.org/CVERecord?id=CVE-2009-0041 Availability =========== This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/200905-01 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 This email address is being protected from spambots. You need JavaScript enabled to view it. or alternatively, you may file a bug at https://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. https://creativecommons.org/licenses/by-sa/2.5/ . Asterisk vulnerability on Gentoo leads to potential denial of service and accidental username exposure. Immediate software update is essential for protection.. Asterisk Security Issues, Gentoo Asterisk Advisory, Denial of Service, Security Flaw Mitigation. . LinuxSecurity.com Team

May 02, 2009 Gentoo