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+<?xml version="1.0" encoding="utf-8"?>
+<?xml-stylesheet href="/xsl/glsa.xsl" type="text/xsl"?>
+<?xml-stylesheet href="/xsl/guide.xsl" type="text/xsl"?>
+<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
+
+<glsa id="200704-01">
+ <title>Asterisk: Two SIP Denial of Service vulnerabilities</title>
+ <synopsis>
+ Asterisk is vulnerable to two Denial of Service issues in the SIP channel.
+ </synopsis>
+ <product type="ebuild">asterisk</product>
+ <announced>April 02, 2007</announced>
+ <revised>April 02, 2007: 01</revised>
+ <bug>171467</bug>
+ <access>remote</access>
+ <affected>
+ <package name="net-misc/asterisk" auto="yes" arch="*">
+ <unaffected range="ge">1.2.14-r2</unaffected>
+ <unaffected range="rge">1.0.12-r2</unaffected>
+ <vulnerable range="lt">1.2.14-r2</vulnerable>
+ </package>
+ </affected>
+ <background>
+ <p>
+ Asterisk is an open source implementation of a telephone private branch
+ exchange (PBX).
+ </p>
+ </background>
+ <description>
+ <p>
+ The Madynes research team at INRIA has discovered that Asterisk
+ contains a null pointer dereferencing error in the SIP channel when
+ handling INVITE messages. Furthermore qwerty1979 discovered that
+ Asterisk 1.2.x fails to properly handle SIP responses with return code
+ 0.
+ </p>
+ </description>
+ <impact type="normal">
+ <p>
+ A remote attacker could cause an Asterisk server listening for SIP
+ messages to crash by sending a specially crafted SIP message or
+ answering with a 0 return code.
+ </p>
+ </impact>
+ <workaround>
+ <p>
+ There is no known workaround at this time.
+ </p>
+ </workaround>
+ <resolution>
+ <p>
+ All Asterisk users should upgrade to the latest version:
+ </p>
+ <code>
+ # emerge --sync
+ # emerge --ask --oneshot --verbose net-misc/asterisk</code>
+ <p>
+ Note: Asterisk 1.0.x is no longer supported upstream so users should
+ consider upgrading to Asterisk 1.2.x.
+ </p>
+ </resolution>
+ <references>
+ <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-1561">CVE-2007-1561</uri>
+ <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-1594">CVE-2007-1594</uri>
+ </references>
+ <metadata tag="submitter" timestamp="Tue, 20 Mar 2007 20:55:47 +0000">
+ jaervosz
+ </metadata>
+ <metadata tag="bugReady" timestamp="Mon, 02 Apr 2007 16:33:39 +0000">
+ jaervosz
+ </metadata>
+</glsa>