glsa-200706-09.xml


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

<glsa id="200706-09">
  <title>libexif: Buffer overflow</title>
  <synopsis>
    libexif does not properly handle image EXIF information, possibly allowing
    for the execution of arbitrary code.
  </synopsis>
  <product type="ebuild">libexif</product>
  <announced>June 26, 2007</announced>
  <revised>June 26, 2007: 01</revised>
  <bug>181922</bug>
  <access>remote</access>
  <affected>
    <package name="media-libs/libexif" auto="yes" arch="*">
      <unaffected range="ge">0.6.16</unaffected>
      <vulnerable range="lt">0.6.16</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    libexif is a library for parsing, editing and saving EXIF metadata from
    images.
    </p>
  </background>
  <description>
    <p>
    iDefense Labs have discovered that the exif_data_load_data_entry()
    function in libexif/exif-data.c improperly handles integer data while
    working with an image with many EXIF components, allowing an integer
    overflow possibly leading to a heap-based buffer overflow.
    </p>
  </description>
  <impact type="normal">
    <p>
    An attacker could entice a user of an application making use of a
    vulnerable version of libexif to load a specially crafted image file,
    possibly resulting in a crash of the application or the execution of
    arbitrary code with the rights of the user running the application.
    </p>
  </impact>
  <workaround>
    <p>
    There is no known workaround at this time.
    </p>
  </workaround>
  <resolution>
    <p>
    All libexif users should upgrade to the latest version:
    </p>
    <code>
    # emerge --sync
    # emerge --ask --oneshot --verbose &quot;&gt;=media-libs/libexif-0.6.16&quot;</code>
  </resolution>
  <references>
    <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4168">CVE-2006-4168</uri>
  </references>
  <metadata tag="requester" timestamp="Sat, 16 Jun 2007 06:17:21 +0000">
    jaervosz
  </metadata>
  <metadata tag="bugReady" timestamp="Sat, 16 Jun 2007 06:17:44 +0000">
    jaervosz
  </metadata>
  <metadata tag="submitter" timestamp="Tue, 19 Jun 2007 02:58:18 +0000">
    shellsage
  </metadata>
</glsa>