<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200909-13">
  <title>irssi: Execution of arbitrary code</title>
  <synopsis>
    A remotely exploitable off-by-one error leading to a heap overflow was
    found in irssi which might result in the execution of arbitrary code.
  </synopsis>
  <product type="ebuild">irssi</product>
  <announced>2009-09-12</announced>
  <revised count="01">2009-09-12</revised>
  <bug>271875</bug>
  <access>remote</access>
  <affected>
    <package name="net-irc/irssi" auto="yes" arch="*">
      <unaffected range="ge">0.8.13-r1</unaffected>
      <vulnerable range="lt">0.8.13-r1</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    irssi is a modular textUI IRC client with IPv6 support.
    </p>
  </background>
  <description>
    <p>
    Nemo discovered an off-by-one error leading to a heap overflow in
    irssi's event_wallops() parsing function.
    </p>
  </description>
  <impact type="high">
    <p>
    A remote attacker might entice a user to connect to a malicious IRC
    server, use a man-in-the-middle attack to redirect a user to such a
    server or use ircop rights to send a specially crafted WALLOPS message,
    which might result in the execution of arbitrary code with the
    privileges of the user running irssi.
    </p>
  </impact>
  <workaround>
    <p>
    There is no known workaround at this time.
    </p>
  </workaround>
  <resolution>
    <p>
    All irssi users should upgrade to the latest version:
    </p>
    <code>
    # emerge --sync
    # emerge --ask --oneshot --verbose "&gt;=net-irc/irssi-0.8.13-r1"</code>
  </resolution>
  <references>
    <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1959">CVE-2009-1959</uri>
  </references>
  <metadata tag="requester" timestamp="2009-06-10T19:45:21Z">
    a3li
  </metadata>
  <metadata tag="submitter" timestamp="2009-07-02T19:15:53Z">
    craig
  </metadata>
  <metadata tag="bugReady" timestamp="2009-09-12T16:10:35Z">
    craig
  </metadata>
</glsa>