74 lines
2.6 KiB
XML
74 lines
2.6 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="201502-10">
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<title>libpng: User-assisted execution of arbitrary code</title>
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<synopsis>Two vulnerabilities have been found in libpng, possibly resulting
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in execution of arbitrary code.
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</synopsis>
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<product type="ebuild">libpng</product>
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<announced>2015-02-15</announced>
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<revised count="3">2017-01-03</revised>
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<bug>531264</bug>
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<bug>533358</bug>
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<access>local, 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">1.6.16</unaffected>
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<unaffected range="ge" slot="1.5">1.5.21</unaffected>
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<unaffected range="ge" slot="1.2">1.2.52</unaffected>
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<vulnerable range="lt">1.6.16</vulnerable>
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</package>
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</affected>
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<background>
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<p>libpng is a standard library used to process PNG (Portable Network
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Graphics) images. It is used by several programs, including web browsers
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and potentially server processes.
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</p>
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</background>
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<description>
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<p>Two vulnerabilities have been discovered in libpng:</p>
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<ul>
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<li>The png_user_version_check function contains an out-of-bounds memory
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access error (libpng 1.6.15 Release Notes)
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</li>
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<li>The png_combine_row function contains an integer overflow error,
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which could result in a heap-based buffer overflow (CVE-2014-9495)
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</li>
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</ul>
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</description>
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<impact type="normal">
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<p>A context-dependent attacker could entice a user to open a specially
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crafted PNG file using an application linked against libpng, possibly
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resulting in execution of arbitrary code.
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</p>
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</impact>
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<workaround>
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<p>There is no known workaround at this time.</p>
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</workaround>
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<resolution>
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<p>All libpng 1.6 users should upgrade to the latest version:</p>
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<code>
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# emerge --sync
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# emerge --ask --oneshot --verbose ">=media-libs/libpng-1.6.16"
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</code>
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<p>All libpng 1.5 users should upgrade to the latest version:</p>
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<code>
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# emerge --sync
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# emerge --ask --oneshot --verbose ">=media-libs/libpng-1.5.21"
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</code>
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</resolution>
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<references>
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<uri link="https://nvd.nist.gov/nvd.cfm?cvename=CVE-2014-9495">CVE-2014-9495</uri>
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<uri link="http://www.libpng.org/pub/png/src/libpng-1.6.15-README.txt">
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libpng 1.6.15 Release Notes
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</uri>
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</references>
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<metadata tag="requester" timestamp="2015-01-15T22:55:48Z">
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BlueKnight
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</metadata>
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<metadata tag="submitter" timestamp="2017-01-03T04:39:38Z">ackle</metadata>
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</glsa>
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