glsa-200802-11.xml


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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">

<glsa id="200802-11">
  <title>Asterisk: Multiple vulnerabilities</title>
  <synopsis>
    Multiple vulnerabilities have been found in Asterisk.
  </synopsis>
  <product type="ebuild">asterisk</product>
  <announced>February 26, 2008</announced>
  <revised>February 26, 2008: 01</revised>
  <bug>185713</bug>
  <access>remote</access>
  <affected>
    <package name="net-misc/asterisk" auto="yes" arch="*">
      <unaffected range="rge">1.2.17-r1</unaffected>
      <unaffected range="ge">1.2.21.1-r1</unaffected>
      <vulnerable range="lt">1.2.21.1-r1</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    Asterisk is an open source telephony engine and tool kit.
    </p>
  </background>
  <description>
    <p>
    Multiple vulnerabilities have been found in Asterisk:
    </p>
    <ul>
    <li>Russel Bryant reported a stack buffer overflow in the IAX2 channel
    driver (chan_iax2) when bridging calls between chan_iax2 and any
    channel driver that uses RTP for media (CVE-2007-3762).</li>
    <li>Chris
    Clark and Zane Lackey (iSEC Partners) reported a NULL pointer
    dereference in the IAX2 channel driver (chan_iax2)
    (CVE-2007-3763).</li>
    <li>Will Drewry (Google Security) reported a
    vulnerability in the Skinny channel driver (chan_skinny), resulting in
    an overly large memcpy (CVE-2007-3764).</li>
    <li>Will Drewry (Google
    Security) reported a vulnerability in the IAX2 channel driver
    (chan_iax2), that does not correctly handle unauthenticated
    transactions using a 3-way handshake (CVE-2007-4103).</li>
    </ul>
  </description>
  <impact type="high">
    <p>
    By sending a long voice or video RTP frame, a remote attacker could
    possibly execute arbitrary code on the target machine. Sending
    specially crafted LAGRQ or LAGRP frames containing information elements
    of IAX frames, or a certain data length value in a crafted packet, or
    performing a flood of calls not completing a 3-way handshake, could
    result in a Denial of Service.
    </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 &quot;&gt;=net-misc/asterisk-1.2.17-r1&quot;</code>
  </resolution>
  <references>
    <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-3762">CVE-2007-3762</uri>
    <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-3763">CVE-2007-3763</uri>
    <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-3764">CVE-2007-3764</uri>
    <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4103">CVE-2007-4103</uri>
  </references>
  <metadata tag="requester" timestamp="Wed, 07 Nov 2007 19:55:16 +0000">
    jaervosz
  </metadata>
  <metadata tag="submitter" timestamp="Thu, 22 Nov 2007 23:26:53 +0000">
    keytoaster
  </metadata>
  <metadata tag="bugReady" timestamp="Tue, 26 Feb 2008 19:44:52 +0000">
    jaervosz
  </metadata>
</glsa>