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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>May 31, 2007</announced>
<revised>May 31, 2007: 01</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 &quot;&gt;=media-libs/libpng-1.2.18&quot;</code>
</resolution>
<references>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-2445">CVE-2007-2445</uri>
</references>
<metadata tag="requester" timestamp="Sun, 27 May 2007 07:35:26 +0000">
jaervosz
</metadata>
<metadata tag="submitter" timestamp="Sun, 27 May 2007 13:49:05 +0000">
falco
</metadata>
<metadata tag="bugReady" timestamp="Thu, 31 May 2007 08:41:58 +0000">
p-y
</metadata>
</glsa>