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

<glsa id="200611-09">
  <title>libpng: Denial of Service</title>
  <synopsis>
    A vulnerability in libpng may allow a remote attacker to crash applications
    that handle untrusted images.
  </synopsis>
  <product type="ebuild">libpng</product>
  <announced>November 17, 2006</announced>
  <revised>November 17, 2006: 01</revised>
  <bug>154380</bug>
  <access>remote</access>
  <affected>
    <package name="media-libs/libpng" auto="yes" arch="*">
      <unaffected range="ge">1.2.13</unaffected>
      <vulnerable range="lt">1.2.13</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    libpng is a free ANSI C library used to process and manipulate PNG
    images.
    </p>
  </background>
  <description>
    <p>
    Tavis Ormandy of the Gentoo Linux Security Audit Team discovered that a
    vulnerability exists in the sPLT chunk handling code of libpng, a large
    sPLT chunk may cause an application to attempt to read out of bounds.
    </p>
  </description>
  <impact type="normal">
    <p>
    A remote attacker could craft an image that when processed or viewed by
    an application using libpng causes the application to terminate
    abnormally.
    </p>
  </impact>
  <workaround>
    <p>
    There is no known workaround at this time.
    </p>
  </workaround>
  <resolution>
    <p>
    All libpng users should upgrade to the latest version:
    </p>
    <code>
    # emerge --sync
    # emerge --ask --oneshot --verbose &quot;&gt;=media-libs/libpng-1.2.13&quot;</code>
  </resolution>
  <references>
    <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-5793">CVE-2006-5793</uri>
  </references>
  <metadata tag="submitter" timestamp="Fri, 10 Nov 2006 11:17:04 +0000">
    taviso
  </metadata>
  <metadata tag="bugReady" timestamp="Thu, 16 Nov 2006 15:07:26 +0000">
    vorlon
  </metadata>
</glsa>