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<?xml version="1.0" encoding="utf-8"?>
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<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
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<glsa id="200705-24">
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<title>libpng: Denial of service</title>
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<synopsis>
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A vulnerability in libpng may allow a remote attacker to crash applications
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that handle untrusted images.
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</synopsis>
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<product type="ebuild">libpng</product>
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<announced>2007-05-31</announced>
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<revised count="01">2007-05-31</revised>
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<bug>178004</bug>
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<access>remote</access>
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<affected>
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<package name="media-libs/libpng" auto="yes" arch="*">
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<unaffected range="ge">1.2.17</unaffected>
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<vulnerable range="lt">1.2.17</vulnerable>
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</package>
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</affected>
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<background>
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<p>
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libpng is a free ANSI C library used to process and manipulate PNG
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images.
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</p>
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</background>
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<description>
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<p>
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Mats Palmgren fixed an error in file pngrutil.c in which the trans[]
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array might be not allocated because of images with a bad tRNS chunk
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CRC value.
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</p>
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</description>
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<impact type="normal">
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<p>
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A remote attacker could craft an image that when processed or viewed by
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an application using libpng causes the application to terminate
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abnormally.
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</p>
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</impact>
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<workaround>
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<p>
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There is no known workaround at this time.
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</p>
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</workaround>
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<resolution>
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<p>
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Please note that due to separate bugs in libpng 1.2.17, Gentoo does not
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provide libpng-1.2.17 but libpng-1.2.18. All libpng users should
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upgrade to the latest version:
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</p>
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<code>
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# emerge --sync
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# emerge --ask --oneshot --verbose ">=media-libs/libpng-1.2.18"</code>
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</resolution>
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<references>
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<uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-2445">CVE-2007-2445</uri>
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</references>
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<metadata tag="requester" timestamp="2007-05-27T07:35:26Z">
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jaervosz
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</metadata>
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<metadata tag="submitter" timestamp="2007-05-27T13:49:05Z">
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falco
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</metadata>
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<metadata tag="bugReady" timestamp="2007-05-31T08:41:58Z">
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p-y
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</metadata>
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</glsa>
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