<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200905-01">
  <title>Asterisk: Multiple vulnerabilities</title>
  <synopsis>
    Multiple vulnerabilities have been found in Asterisk allowing for Denial of
    Service and username disclosure.
  </synopsis>
  <product type="ebuild">asterisk</product>
  <announced>2009-05-02</announced>
  <revised count="01">2009-05-02</revised>
  <bug>218966</bug>
  <bug>224835</bug>
  <bug>232696</bug>
  <bug>232698</bug>
  <bug>237476</bug>
  <bug>250748</bug>
  <bug>254304</bug>
  <access>remote</access>
  <affected>
    <package name="net-misc/asterisk" auto="yes" arch="*">
      <unaffected range="ge">1.2.32</unaffected>
      <vulnerable range="lt">1.2.32</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    Asterisk is an open source telephony engine and toolkit.
    </p>
  </background>
  <description>
    <p>
    Multiple vulnerabilities have been discovered in the IAX2 channel
    driver when performing the 3-way handshake (CVE-2008-1897), when
    handling a large number of POKE requests (CVE-2008-3263), when handling
    authentication attempts (CVE-2008-5558) and when handling firmware
    download (FWDOWNL) requests (CVE-2008-3264). Asterisk does also not
    correctly handle SIP INVITE messages that lack a "From" header
    (CVE-2008-2119), and responds differently to a failed login attempt
    depending on whether the user account exists (CVE-2008-3903,
    CVE-2009-0041).
    </p>
  </description>
  <impact type="normal">
    <p>
    Remote unauthenticated attackers could send specially crafted data to
    Asterisk, possibly resulting in a Denial of Service via a daemon crash,
    call-number exhaustion, CPU or traffic consumption. Remote
    unauthenticated attackers could furthermore enumerate valid usernames
    to facilitate brute force login attempts.
    </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 "&gt;=net-misc/asterisk-1.2.32"</code>
  </resolution>
  <references>
    <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1897">CVE-2008-1897</uri>
    <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2119">CVE-2008-2119</uri>
    <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3263">CVE-2008-3263</uri>
    <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3264">CVE-2008-3264</uri>
    <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3903">CVE-2008-3903</uri>
    <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-5558">CVE-2008-5558</uri>
    <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0041">CVE-2009-0041</uri>
  </references>
  <metadata tag="requester" timestamp="2009-04-02T12:17:04Z">
    rbu
  </metadata>
  <metadata tag="submitter" timestamp="2009-04-02T12:31:27Z">
    rbu
  </metadata>
  <metadata tag="bugReady" timestamp="2009-04-02T12:32:59Z">
    rbu
  </metadata>
</glsa>
