glsa-200704-01.xml


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<?xml version="1.0" encoding="utf-8"?>
<!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>