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53 lines
1.8 KiB
53 lines
1.8 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="201701-28">
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<title>c-ares: Heap-based buffer overflow</title>
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<synopsis>A heap-based buffer overflow in c-ares might allow remote attackers
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to cause a Denial of Service condition.
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</synopsis>
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<product type="ebuild">c-ares</product>
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<announced>2017-01-11</announced>
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<revised count="1">2017-01-11</revised>
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<bug>595536</bug>
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<access>remote</access>
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<affected>
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<package name="net-dns/c-ares" auto="yes" arch="*">
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<unaffected range="ge">1.12.0</unaffected>
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<vulnerable range="lt">1.12.0</vulnerable>
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</package>
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</affected>
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<background>
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<p>c-ares is a C library for asynchronous DNS requests (including name
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resolves).
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</p>
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</background>
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<description>
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<p>A hostname with an escaped trailing dot (such as “hello\.”) would
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have its size calculated incorrectly leading to a single byte written
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beyond the end of a buffer on the heap.
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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, able to provide a specially crafted hostname to an
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application using c-ares, could potentially cause a Denial of Service
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condition.
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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 c-ares 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 ">=net-dns/c-ares-1.12.0"
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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-2016-5180">CVE-2016-5180</uri>
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</references>
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<metadata tag="requester" timestamp="2017-01-09T14:14:23Z">whissi</metadata>
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<metadata tag="submitter" timestamp="2017-01-11T12:29:54Z">whissi</metadata>
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</glsa>
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