72 lines
2.6 KiB
XML
72 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="201701-74">
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<title>libpng: Remote execution of arbitrary code</title>
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<synopsis>A null pointer dereference in libpng might allow remote attackers
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to execute arbitrary code.
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</synopsis>
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<product type="ebuild">libpng</product>
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<announced>2017-01-29</announced>
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<revised count="1">2017-01-29</revised>
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<bug>604082</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">1.6.27</unaffected>
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<unaffected range="ge" slot="1.5">1.5.28</unaffected>
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<unaffected range="ge" slot="1.2">1.2.57</unaffected>
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<vulnerable range="lt">1.6.27</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>A null pointer dereference was discovered in libpng in the
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png_push_save_buffer function. In order to be vulnerable, an application
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has to load a text chunk into the PNG structure, then delete all text,
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then add another text chunk to the same PNG structure, which seems to be
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an unlikely sequence, but it is possible.
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</p>
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</description>
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<impact type="normal">
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<p>A remote attacker, by enticing a user to process a specially crafted PNG
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file, could execute arbitrary code with the privileges of the process.
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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.x 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-1.6.27"
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</code>
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<p>All libpng 1.5.x 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-1.5.28:1.5"
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</code>
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<p>All libpng 1.2.x 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-1.2.57:1.2"
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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-2016-10087">
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CVE-2016-10087
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</uri>
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</references>
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<metadata tag="requester" timestamp="2017-01-18T08:20:53Z">b-man</metadata>
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<metadata tag="submitter" timestamp="2017-01-29T17:07:28Z">b-man</metadata>
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</glsa>
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