70 lines
2.3 KiB
XML
70 lines
2.3 KiB
XML
<?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="200804-15">
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<title>libpng: Execution of arbitrary code</title>
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<synopsis>
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A vulnerability in libpng may allow for execution of arbitrary code in
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certain applications that handle untrusted images.
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</synopsis>
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<product type="ebuild">libpng</product>
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<announced>April 15, 2008</announced>
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<revised>April 15, 2008: 01</revised>
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<bug>217047</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">1.2.26-r1</unaffected>
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<vulnerable range="lt">1.2.26-r1</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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Tavis Ormandy of the Google Security Team discovered that libpng does
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not handle zero-length unknown chunks in PNG files correctly, which
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might lead to memory corruption in applications that call
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png_set_read_user_chunk_fn() or png_set_keep_unknown_chunks().
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</p>
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</description>
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<impact type="high">
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<p>
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A remote attacker could entice a user or automated system to process a
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specially crafted PNG image in an application using libpng and possibly
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execute arbitrary code with the privileges of the user running the
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application. Note that processing of unknown chunks is disabled by
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default in most PNG applications, but some such as ImageMagick are
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affected.
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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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All libpng users should 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-1.2.26-r1"</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=CVE-2008-1382">CVE-2008-1382</uri>
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</references>
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<metadata tag="requester" timestamp="Mon, 14 Apr 2008 01:44:56 +0000">
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rbu
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</metadata>
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<metadata tag="submitter" timestamp="Mon, 14 Apr 2008 01:49:03 +0000">
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rbu
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</metadata>
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<metadata tag="bugReady" timestamp="Mon, 14 Apr 2008 08:39:38 +0000">
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p-y
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</metadata>
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</glsa>
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