glsa-200611-01.xml


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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200611-01">
  <title>Screen: UTF-8 character handling vulnerability</title>
  <synopsis>
    Screen contains an error in its UTF-8 character handling code that would
    allow a remote Denial of Service or possibly the remote execution of
    arbitrary code.
  </synopsis>
  <product type="ebuild">screen</product>
  <announced>2006-11-03</announced>
  <revised count="01">2006-11-03</revised>
  <bug>152770</bug>
  <access>remote</access>
  <affected>
    <package name="app-misc/screen" auto="yes" arch="*">
      <unaffected range="ge">4.0.3</unaffected>
      <vulnerable range="lt">4.0.3</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    Screen is a full-screen window manager that multiplexes a physical
    terminal between several processes, typically interactive shells.
    </p>
  </background>
  <description>
    <p>
    cstone and Richard Felker discovered a flaw in Screen's UTF-8 combining
    character handling.
    </p>
  </description>
  <impact type="high">
    <p>
    The vulnerability can be exploited by writing a special string of
    characters to a Screen window. A remote attacker could cause a Denial
    of Service or possibly execute arbitrary code with the privileges of
    the user running Screen through a program being run inside a Screen
    session, such as an IRC client or a mail client.
    </p>
  </impact>
  <workaround>
    <p>
    There is no known workaround at this time.
    </p>
  </workaround>
  <resolution>
    <p>
    All Screen users should upgrade to the latest version:
    </p>
    <code>
    # emerge --sync
    # emerge --ask --oneshot --verbose "&gt;=app-misc/screen-4.0.3"</code>
  </resolution>
  <references>
    <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4573">CVE-2006-4573</uri>
  </references>
  <metadata tag="submitter" timestamp="2006-10-27T12:01:54Z">
    aetius
  </metadata>
  <metadata tag="bugReady" timestamp="2006-10-30T11:11:00Z">
    falco
  </metadata>
</glsa>