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Gentoo Linux Security Advisory GLSA 200802-11 |
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http://security.gentoo.org/ |
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Severity: High |
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Title: Asterisk: Multiple vulnerabilities |
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Date: February 26, 2008 |
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Bugs: #185713 |
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ID: 200802-11 |
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Synopsis |
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======== |
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|
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Multiple vulnerabilities have been found in Asterisk. |
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|
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Background |
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========== |
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|
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Asterisk is an open source telephony engine and tool kit. |
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|
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Affected packages |
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================= |
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|
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------------------------------------------------------------------- |
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Package / Vulnerable / Unaffected |
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------------------------------------------------------------------- |
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1 net-misc/asterisk < 1.2.21.1-r1 *>= 1.2.17-r1 |
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>= 1.2.21.1-r1 |
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|
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Description |
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=========== |
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|
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Multiple vulnerabilities have been found in Asterisk: |
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|
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* Russel Bryant reported a stack buffer overflow in the IAX2 channel |
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driver (chan_iax2) when bridging calls between chan_iax2 and any |
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channel driver that uses RTP for media (CVE-2007-3762). |
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|
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* Chris Clark and Zane Lackey (iSEC Partners) reported a NULL pointer |
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dereference in the IAX2 channel driver (chan_iax2) (CVE-2007-3763). |
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|
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* Will Drewry (Google Security) reported a vulnerability in the |
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Skinny channel driver (chan_skinny), resulting in an overly large |
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memcpy (CVE-2007-3764). |
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|
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* Will Drewry (Google Security) reported a vulnerability in the IAX2 |
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channel driver (chan_iax2), that does not correctly handle |
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unauthenticated transactions using a 3-way handshake (CVE-2007-4103). |
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|
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Impact |
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====== |
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|
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By sending a long voice or video RTP frame, a remote attacker could |
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possibly execute arbitrary code on the target machine. Sending |
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specially crafted LAGRQ or LAGRP frames containing information elements |
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of IAX frames, or a certain data length value in a crafted packet, or |
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performing a flood of calls not completing a 3-way handshake, could |
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result in a Denial of Service. |
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|
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Workaround |
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========== |
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|
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There is no known workaround at this time. |
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Resolution |
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========== |
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All Asterisk users should upgrade to the latest version: |
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|
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=net-misc/asterisk-1.2.17-r1" |
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|
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References |
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========== |
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|
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[ 1 ] CVE-2007-3762 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-3762 |
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[ 2 ] CVE-2007-3763 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-3763 |
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[ 3 ] CVE-2007-3764 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-3764 |
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[ 4 ] CVE-2007-4103 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4103 |
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|
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Availability |
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============ |
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|
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This GLSA and any updates to it are available for viewing at |
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the Gentoo Security Website: |
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|
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http://security.gentoo.org/glsa/glsa-200802-11.xml |
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Concerns? |
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========= |
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Security is a primary focus of Gentoo Linux and ensuring the |
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confidentiality and security of our users machines is of utmost |
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importance to us. Any security concerns should be addressed to |
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security@g.o or alternatively, you may file a bug at |
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http://bugs.gentoo.org. |
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|
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License |
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======= |
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|
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Copyright 2008 Gentoo Foundation, Inc; referenced text |
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belongs to its owner(s). |
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|
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The contents of this document are licensed under the |
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Creative Commons - Attribution / Share Alike license. |
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http://creativecommons.org/licenses/by-sa/2.5 |
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