glsa-200709-11.xml


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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200709-11">
  <title>GDM: Local Denial of service</title>
  <synopsis>
    GDM can be crashed by a local user, preventing it from managing future
    displays.
  </synopsis>
  <product type="ebuild">gdm</product>
  <announced>2007-09-18</announced>
  <revised count="01">2007-09-18</revised>
  <bug>187919</bug>
  <access>local</access>
  <affected>
    <package name="gnome-base/gdm" auto="yes" arch="*">
      <unaffected range="ge">2.18.4</unaffected>
      <unaffected range="rge">2.16.7</unaffected>
      <vulnerable range="lt">2.18.4</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    GDM is the GNOME display manager.
    </p>
  </background>
  <description>
    <p>
    The result of a g_strsplit() call is incorrectly parsed in the files
    daemon/gdm.c, daemon/gdmconfig.c, gui/gdmconfig.c and
    gui/gdmflexiserver.c, allowing for a null pointer dereference.
    </p>
  </description>
  <impact type="low">
    <p>
    A local user could send a crafted message to /tmp/.gdm_socket that
    would trigger the null pointer dereference and crash GDM, thus
    preventing it from managing future displays.
    </p>
  </impact>
  <workaround>
    <p>
    Restrict the write permissions on /tmp/.gdm_socket to trusted users
    only after each GDM restart.
    </p>
  </workaround>
  <resolution>
    <p>
    All GDM users should upgrade to the latest version:
    </p>
    <code>
    # emerge --sync
    # emerge --ask --oneshot --verbose "gnome-base/gdm"</code>
  </resolution>
  <references>
    <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-3381">CVE-2007-3381</uri>
  </references>
  <metadata tag="requester" timestamp="2007-08-15T05:40:23Z">
    jaervosz
  </metadata>
  <metadata tag="bugReady" timestamp="2007-08-15T05:40:36Z">
    jaervosz
  </metadata>
  <metadata tag="submitter" timestamp="2007-08-20T09:31:53Z">
    falco
  </metadata>
</glsa>