glsa-201408-06.xml


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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="201408-06">
  <title>libpng: Multiple vulnerabilities</title>
  <synopsis>Multiple vulnerabilities have been discovered in libpng which can
    allow a remote attacker to cause a Denial of Service condition.
  </synopsis>
  <product type="ebuild">libpng</product>
  <announced>2014-08-14</announced>
  <revised count="4">2015-06-06</revised>
  <bug>503014</bug>
  <bug>507378</bug>
  <access>remote</access>
  <affected>
    <package name="media-libs/libpng" auto="yes" arch="*">
      <unaffected range="ge">1.6.10</unaffected>
      <unaffected range="lt">1.3</unaffected>
      <unaffected range="rge">1.5.18</unaffected>
      <unaffected range="rge">1.5.19</unaffected>
      <unaffected range="rge">1.5.20</unaffected>
      <unaffected range="rge">1.5.21</unaffected>
      <unaffected range="rge">1.5.22</unaffected>
      <unaffected range="rge">1.5.23</unaffected>
      <unaffected range="rge">1.5.24</unaffected>
      <unaffected range="rge">1.5.25</unaffected>
      <vulnerable range="lt">1.6.10</vulnerable>
    </package>
  </affected>
  <background>
    <p>libpng is a standard library used to process PNG (Portable Network
      Graphics) images. It is used by several programs, including web browsers
      and potentially server processes.
    </p>
  </background>
  <description>
    <p>The png_push_read_chunk function in pngpread.c in the progressive
      decoder enters an infinite loop, when it encounters a zero-length IDAT
      chunk. In addition certain integer overflows have been detected and
      corrected.
    </p>
    
    <p>The 1.2 branch is not affected by these vulnerabilities.</p>
  </description>
  <impact type="normal">
    <p>A remote attacker could entice a user to open a specially crafted PNG
      file using an application linked against libpng, possibly resulting in
      Denial of Service. 
    </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 "&gt;=media-libs/libpng-1.6.10"
    </code>
    
    <p>Users with current installs in the 1.5 branch should also upgrade this
      using:
    </p>
    
    <code>
      # emerge --sync
      # emerge --ask --oneshot --verbose "&gt;=media-libs/libpng-1.5.18:1.5"
    </code>
    
    <p>Packages which depend on this library may need to be recompiled. Tools
      such as revdep-rebuild may assist in identifying these packages.
    </p>
  </resolution>
  <references>
    <uri link="https://nvd.nist.gov/nvd.cfm?cvename=CVE-2013-7353">CVE-2013-7353</uri>
    <uri link="https://nvd.nist.gov/nvd.cfm?cvename=CVE-2013-7354">CVE-2013-7354</uri>
    <uri link="https://nvd.nist.gov/nvd.cfm?cvename=CVE-2014-0333">CVE-2014-0333</uri>
  </references>
  <metadata tag="requester" timestamp="2014-05-15T04:38:43Z">
    BlueKnight
  </metadata>
  <metadata tag="submitter" timestamp="2015-06-06T23:44:55Z">
    pinkbyte
  </metadata>
</glsa>