glsa-200705-24.xml


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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200705-24">
  <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>2007-05-31</announced>
  <revised count="01">2007-05-31</revised>
  <bug>178004</bug>
  <access>remote</access>
  <affected>
    <package name="media-libs/libpng" auto="yes" arch="*">
      <unaffected range="ge">1.2.17</unaffected>
      <vulnerable range="lt">1.2.17</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    libpng is a free ANSI C library used to process and manipulate PNG
    images.
    </p>
  </background>
  <description>
    <p>
    Mats Palmgren fixed an error in file pngrutil.c in which the trans[]
    array might be not allocated because of images with a bad tRNS chunk
    CRC value.
    </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>
    Please note that due to separate bugs in libpng 1.2.17, Gentoo does not
    provide libpng-1.2.17 but libpng-1.2.18. All libpng users should
    upgrade to the latest version:
    </p>
    <code>
    # emerge --sync
    # emerge --ask --oneshot --verbose "&gt;=media-libs/libpng-1.2.18"</code>
  </resolution>
  <references>
    <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-2445">CVE-2007-2445</uri>
  </references>
  <metadata tag="requester" timestamp="2007-05-27T07:35:26Z">
    jaervosz
  </metadata>
  <metadata tag="submitter" timestamp="2007-05-27T13:49:05Z">
    falco
  </metadata>
  <metadata tag="bugReady" timestamp="2007-05-31T08:41:58Z">
    p-y
  </metadata>
</glsa>