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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
+<glsa id="201206-15">
+ <title>libpng: Multiple vulnerabilities</title>
+ <synopsis>Multiple vulnerabilities in libpng might allow remote attackers to
+ execute arbitrary code or cause a Denial of Service condition.
+ </synopsis>
+ <product type="ebuild">libpng</product>
+ <announced>2012-06-22</announced>
+ <revised count="5">2017-01-03</revised>
+ <bug>373967</bug>
+ <bug>386185</bug>
+ <bug>401987</bug>
+ <bug>404197</bug>
+ <bug>410153</bug>
+ <access>remote</access>
+ <affected>
+ <package name="media-libs/libpng" auto="yes" arch="*">
+ <unaffected range="ge">1.5.10</unaffected>
+ <unaffected range="ge" slot="1.2">1.2.49</unaffected>
+ <vulnerable range="lt">1.5.10</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>Multiple vulnerabilities have been discovered in libpng:</p>
+
+ <ul>
+ <li>The “embedded_profile_len()” function in pngwutil.c does not
+ check for negative values, resulting in a memory leak (CVE-2009-5063).
+ </li>
+ <li>The “png_format_buffer()” function in pngerror.c contains an
+ off-by-one error (CVE-2011-2501).
+ </li>
+ <li>The “png_rgb_to_gray()” function in pngrtran.c contains an
+ integer overflow error (CVE-2011-2690).
+ </li>
+ <li>The “png_err()” function in pngerror.c contains a NULL pointer
+ dereference error (CVE-2011-2691).
+ </li>
+ <li>The “png_handle_sCAL()” function in pngrutil.c improperly handles
+ malformed sCAL chunks(CVE-2011-2692).
+ </li>
+ <li>The “png_decompress_chunk()” function in pngrutil.c contains an
+ integer overflow error (CVE-2011-3026).
+ </li>
+ <li>The “png_inflate()” function in pngrutil.c contains and out of
+ bounds error (CVE-2011-3045).
+ </li>
+ <li>The “png_set_text_2()” function in pngset.c contains an error
+ which could result in memory corruption (CVE-2011-3048).
+ </li>
+ <li>The “png_formatted_warning()” function in pngerror.c contains an
+ off-by-one error (CVE-2011-3464).
+ </li>
+ </ul>
+ </description>
+ <impact type="normal">
+ <p>An attacker could exploit these vulnerabilities to execute arbitrary
+ code with the permissions of the user running the vulnerable program,
+ which could be the root user, or to cause programs linked against the
+ library to crash.
+ </p>
+ </impact>
+ <workaround>
+ <p>There is no known workaround at this time.</p>
+ </workaround>
+ <resolution>
+ <p>All libpng 1.5 users should upgrade to the latest version:</p>
+
+ <code>
+ # emerge --sync
+ # emerge --ask --oneshot --verbose "&gt;=media-libs/libpng-1.5.10"
+ </code>
+
+ <p>All libpng 1.2 users should upgrade to the latest version:</p>
+
+ <code>
+ # emerge --sync
+ # emerge --ask --oneshot --verbose "&gt;=media-libs/libpng-1.2.49"
+ </code>
+
+ <p>Packages which depend on this library may need to be recompiled. Tools
+ such as revdep-rebuild may assist in identifying some of these packages.
+ </p>
+ </resolution>
+ <references>
+ <uri link="https://nvd.nist.gov/nvd.cfm?cvename=CVE-2009-5063">CVE-2009-5063</uri>
+ <uri link="https://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-2501">CVE-2011-2501</uri>
+ <uri link="https://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-2690">CVE-2011-2690</uri>
+ <uri link="https://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-2691">CVE-2011-2691</uri>
+ <uri link="https://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-2692">CVE-2011-2692</uri>
+ <uri link="https://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-3026">CVE-2011-3026</uri>
+ <uri link="https://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-3045">CVE-2011-3045</uri>
+ <uri link="https://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-3048">CVE-2011-3048</uri>
+ <uri link="https://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-3464">CVE-2011-3464</uri>
+ </references>
+ <metadata tag="requester" timestamp="2011-10-07T23:37:07Z">
+ underling
+ </metadata>
+ <metadata tag="submitter" timestamp="2017-01-03T04:38:41Z">ackle</metadata>
+</glsa>