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Gentoo Linux Security Advisory GLSA 200704-01 |
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http://security.gentoo.org/ |
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Severity: Normal |
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Title: Asterisk: Two SIP Denial of Service vulnerabilities |
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Date: April 02, 2007 |
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Bugs: #171467 |
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ID: 200704-01 |
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Synopsis |
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======== |
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|
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Asterisk is vulnerable to two Denial of Service issues in the SIP |
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channel. |
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Background |
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========== |
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|
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Asterisk is an open source implementation of a telephone private branch |
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exchange (PBX). |
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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 < 1.2.14-r2 >= 1.2.14-r2 |
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*>= 1.0.12-r2 |
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|
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Description |
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=========== |
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|
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The Madynes research team at INRIA has discovered that Asterisk |
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contains a null pointer dereferencing error in the SIP channel when |
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handling INVITE messages. Furthermore qwerty1979 discovered that |
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Asterisk 1.2.x fails to properly handle SIP responses with return code |
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0. |
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|
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Impact |
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====== |
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|
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A remote attacker could cause an Asterisk server listening for SIP |
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messages to crash by sending a specially crafted SIP message or |
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answering with a 0 return code. |
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|
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Workaround |
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========== |
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There is no known workaround at this time. |
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|
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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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# emerge --sync |
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# emerge --ask --oneshot --verbose net-misc/asterisk |
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|
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Note: Asterisk 1.0.x is no longer supported upstream so users should |
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consider upgrading to Asterisk 1.2.x. |
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|
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References |
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========== |
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|
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[ 1 ] CVE-2007-1561 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-1561 |
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[ 2 ] CVE-2007-1594 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-1594 |
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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-200704-01.xml |
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|
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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 2007 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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|
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http://creativecommons.org/licenses/by-sa/2.5 |
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