glsa-200608-05.xml


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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200608-05">
  <title>LibVNCServer: Authentication bypass</title>
  <synopsis>
    VNC servers created with LibVNCServer accept insecure protocol types, even
    when the server does not offer it, resulting in unauthorized access to the
    server.
  </synopsis>
  <product type="ebuild">libvncserver</product>
  <announced>2006-08-04</announced>
  <revised count="01">2006-08-04</revised>
  <bug>136916</bug>
  <access>remote</access>
  <affected>
    <package name="net-libs/libvncserver" auto="yes" arch="*">
      <unaffected range="ge">0.8.2</unaffected>
      <vulnerable range="lt">0.8.2</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    LibVNCServer is a GPL'ed library for creating VNC servers.
    </p>
  </background>
  <description>
    <p>
    LibVNCServer fails to properly validate protocol types effectively
    letting users decide what protocol to use, such as "Type 1 - None".
    LibVNCServer will accept this security type, even if it is not offered
    by the server.
    </p>
  </description>
  <impact type="high">
    <p>
    An attacker could use this vulnerability to gain unauthorized access
    with the privileges of the user running the VNC server.
    </p>
  </impact>
  <workaround>
    <p>
    There is no known workaround at this time.
    </p>
  </workaround>
  <resolution>
    <p>
    All LibVNCServer users should upgrade to the latest version:
    </p>
    <code>
    # emerge --sync
    # emerge --ask --oneshot --verbose "&gt;=net-libs/libvncserver-0.8.2"</code>
  </resolution>
  <references>
    <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-2450">CVE-2006-2450</uri>
  </references>
  <metadata tag="requester" timestamp="2006-07-29T16:47:24Z">
    vorlon078
  </metadata>
  <metadata tag="bugReady" timestamp="2006-07-29T16:50:23Z">
    vorlon078
  </metadata>
  <metadata tag="submitter" timestamp="2006-07-31T01:51:07Z">
    hlieberman
  </metadata>
</glsa>