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[Full-disclosure] [ GLSA 200905-01 ] Asterisk: Multiple vulnerabilities
From: Robert Buchholz <rbu_at_nospam>Date: Sat May 02 2009 - 17:54:49 GMT
To: gentoo-announce@gentoo.org
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200905-01
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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@gentoo.org 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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