glsa-200611-13.xml


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

<glsa id="200611-13">
  <title>Avahi: &quot;netlink&quot; message vulnerability</title>
  <synopsis>
    Avahi fails to verify the origin of netlink messages, which could allow
    local users to spoof network changes.
  </synopsis>
  <product type="ebuild">avahi</product>
  <announced>November 20, 2006</announced>
  <revised>November 20, 2006: 01</revised>
  <bug>154322</bug>
  <access>local</access>
  <affected>
    <package name="net-dns/avahi" auto="yes" arch="*">
      <unaffected range="ge">0.6.15</unaffected>
      <vulnerable range="lt">0.6.15</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    Avahi is a system that facilitates service discovery on a local
    network.
    </p>
  </background>
  <description>
    <p>
    Avahi does not check that the netlink messages come from the kernel
    instead of a user-space process.
    </p>
  </description>
  <impact type="normal">
    <p>
    A local attacker could exploit this vulnerability by crafting malicious
    netlink messages and trick Avahi to react to fake network changes. This
    could lead users to connect to untrusted services without knowing.
    </p>
  </impact>
  <workaround>
    <p>
    There is no known workaround at this time.
    </p>
  </workaround>
  <resolution>
    <p>
    All Avahi users should upgrade to the latest version:
    </p>
    <code>
    # emerge --sync
    # emerge --ask --oneshot --verbose &quot;&gt;=net-dns/avahi-0.6.15&quot;</code>
  </resolution>
  <references>
    <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-5461">CVE-2006-5461</uri>
  </references>
  <metadata tag="requester" timestamp="Thu, 16 Nov 2006 11:46:25 +0000">
    vorlon
  </metadata>
  <metadata tag="bugReady" timestamp="Thu, 16 Nov 2006 11:47:51 +0000">
    vorlon
  </metadata>
  <metadata tag="submitter" timestamp="Mon, 20 Nov 2006 08:40:32 +0000">
    jaervosz
  </metadata>
</glsa>