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<?xml version="1.0" encoding="UTF-8"?>
<glsa id="201010-01">
<title>Libpng: Multiple vulnerabilities</title>
<synopsis>Multiple vulnerabilities in libpng might lead to privilege
escalation or a Denial of Service.
<product type="ebuild">libpng</product>
<announced>October 05, 2010</announced>
<revised>June 06, 2015: 8</revised>
<package name="media-libs/libpng" auto="yes" arch="*">
<unaffected range="ge">1.4.3</unaffected>
<unaffected range="rge">1.2.46</unaffected>
<unaffected range="rge">1.2.47</unaffected>
<unaffected range="rge">1.2.49</unaffected>
<unaffected range="rge">1.2.50</unaffected>
<unaffected range="rge">1.2.51</unaffected>
<unaffected range="rge">1.2.52</unaffected>
<unaffected range="rge">1.2.53</unaffected>
<unaffected range="rge">1.2.54</unaffected>
<unaffected range="rge">1.2.55</unaffected>
<unaffected range="rge">1.2.56</unaffected>
<vulnerable range="lt">1.4.3</vulnerable>
<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>Multiple vulnerabilities were found in libpng:</p>
<li>The png_decompress_chunk() function in pngrutil.c does not properly
handle certain type of compressed data (CVE-2010-0205)
<li>A buffer overflow in pngread.c when using progressive applications
<li>A memory leak in pngrutil.c when dealing with a certain type of
chunks (CVE-2010-2249)
<impact type="normal">
<p>An attacker could exploit these vulnerabilities to cause programs linked
against the library to crash or execute arbitrary code with the
permissions of the user running the vulnerable program, which could be
the root user.
<p>There is no known workaround at this time.</p>
<p>All libpng 1.4 users should upgrade to the latest version:</p>
# emerge --sync
# emerge --ask --oneshot --verbose "&gt;=media-libs/libpng-1.4.3"
<p>All libpng 1.2 users should upgrade to the latest version:</p>
# emerge --sync
# emerge --ask --oneshot --verbose "&gt;=media-libs/libpng-1.2.46"
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<metadata tag="requester" timestamp="Fri, 07 Oct 2011 22:32:46 +0000">craig</metadata>
<metadata tag="submitter" timestamp="Sat, 06 Jun 2015 23:36:51 +0000">system</metadata>
<metadata tag="bugReady" timestamp="Sat, 06 Jun 2015 23:36:52 +0000">system</metadata>