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87 lines
3.0 KiB
87 lines
3.0 KiB
<?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="200903-28">
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<title>libpng: Multiple vulnerabilities</title>
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<synopsis>
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Multiple vulnerabilities were found in libpng, which might result in the
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execution of arbitrary code
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</synopsis>
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<product type="ebuild">libpng</product>
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<announced>2009-03-15</announced>
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<revised count="01">2009-03-15</revised>
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<bug>244808</bug>
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<bug>255231</bug>
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<bug>259578</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">1.2.35</unaffected>
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<vulnerable range="lt">1.2.35</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 the official PNG reference library used to read, write and
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manipulate PNG 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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Multiple vulnerabilities were discovered in libpng:
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</p>
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<ul>
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<li>A
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memory leak bug was reported in png_handle_tEXt(), a function that is
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used while reading PNG images (CVE-2008-6218).</li>
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<li>A memory
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overwrite bug was reported by Jon Foster in png_check_keyword(), caused
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by writing overlong keywords to a PNG file (CVE-2008-5907).</li>
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<li>A
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memory corruption issue, caused by an incorrect handling of an out of
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memory condition has been reported by Tavis Ormandy of the Google
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Security Team. That vulnerability affects direct uses of
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png_read_png(), pCAL chunk and 16-bit gamma table handling
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(CVE-2009-0040).</li>
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</ul>
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</description>
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<impact type="normal">
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<p>
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A remote attacker may execute arbitrary code with the privileges of the
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user opening a specially crafted PNG file by exploiting the erroneous
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out-of-memory handling. An attacker may also exploit the
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png_check_keyword() error to set arbitrary memory locations to 0, if
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the application allows overlong, user-controlled keywords when writing
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PNG files. The png_handle_tEXT() vulnerability may be exploited by an
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attacker to potentially consume all memory on a users system when a
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specially crafted PNG file is opened.
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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-1.2.35"</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-2008-5907">CVE-2008-5907</uri>
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<uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-6218">CVE-2008-6218</uri>
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<uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0040">CVE-2009-0040</uri>
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</references>
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<metadata tag="requester" timestamp="2009-01-11T18:45:00Z">
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craig
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</metadata>
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<metadata tag="submitter" timestamp="2009-02-13T19:13:22Z">
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mabi
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</metadata>
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<metadata tag="bugReady" timestamp="2009-03-13T19:09:44Z">
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p-y
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</metadata>
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</glsa>
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