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75 lines
2.4 KiB
75 lines
2.4 KiB
<?xml version="1.0" encoding="utf-8"?>
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<?xml-stylesheet href="/xsl/glsa.xsl" type="text/xsl"?>
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<?xml-stylesheet href="/xsl/guide.xsl" type="text/xsl"?>
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<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
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<glsa id="200407-06">
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<title>libpng: Buffer overflow on row buffers</title>
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<synopsis>
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libpng contains a buffer overflow vulnerability potentially allowing an
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attacker to perform a Denial of Service attack or even execute arbitrary
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code.
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</synopsis>
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<product type="ebuild">libpng</product>
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<announced>July 08, 2004</announced>
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<revised>July 08, 2004: 01</revised>
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<bug>56307</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">1.2.5-r7</unaffected>
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<vulnerable range="le">1.2.5-r6</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 standard library used to process PNG (Portable Network
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Graphics) images. It is used by several other programs, including web
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browsers and potentially server processes.
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</p>
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</background>
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<description>
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<p>
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Due to a wrong calculation of loop offset values, libpng contains a buffer
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overflow vulnerability on the row buffers. This vulnerability was initially
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patched in January 2003 but since it has been discovered that libpng
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contains the same vulnerability in two other places.
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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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An attacker could exploit this vulnerability to cause programs linked
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against the library to crash or execute arbitrary code with the permissions
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of the user running the vulnerable program, which could be the root user.
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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. All users are encouraged to
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upgrade to the latest available version.
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</p>
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</workaround>
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<resolution>
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<p>
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All libpng users should upgrade to the latest stable version:
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</p>
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<code>
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# emerge sync
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# emerge -pv ">=media-libs/libpng-1.2.5-r7"
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# emerge ">=media-libs/libpng-1.2.5-r7"</code>
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<p>
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You should also run revdep-rebuild to rebuild any packages that depend on
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older versions of libpng :
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</p>
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<code>
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# revdep-rebuild</code>
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</resolution>
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<references>
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<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-1363">CAN-2002-1363</uri>
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</references>
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<metadata tag="submitter">
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jaervosz
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</metadata>
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</glsa>
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