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<?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="201706-21">
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<title>nettle: Information disclosure</title>
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<synopsis>A cache-related side channel vulnerability was found in nettle
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which might allow an attacker to obtain sensitive information.
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</synopsis>
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<product type="ebuild">nettle</product>
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<announced>2017-06-22</announced>
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<revised count="1">2017-06-22</revised>
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<bug>590484</bug>
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<access>local, remote</access>
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<affected>
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<package name="dev-libs/nettle" auto="yes" arch="*">
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<unaffected range="ge">3.2-r1</unaffected>
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<vulnerable range="lt">3.2-r1</vulnerable>
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</package>
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</affected>
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<background>
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<p>Nettle is a cryptographic library that is designed to fit easily in
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almost any context: In cryptographic toolkits for object-oriented
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languages, such as C++, Python, or Pike, in applications like lsh or
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GnuPG, or even in kernel space.
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</p>
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</background>
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<description>
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<p>It was found that nettle’s RSA and DSA decryption code was vulnerable
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to cache-related side channel attacks.
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</p>
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<p>See the referenced technical paper “Cache Attacks Enable Bulk Key
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Recovery on the Cloud” below for details.
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</p>
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</description>
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<impact type="normal">
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<p>An attacker could recover the private key from a co-located
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virtual-machine instance.
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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 nettle 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 ">=dev-libs/nettle-3.2-r1"
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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-2016-6489">CVE-2016-6489</uri>
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<uri link="https://eprint.iacr.org/2016/596.pdf">Cache Attacks Enable Bulk
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Key Recovery on the Cloud
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</uri>
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</references>
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<metadata tag="requester" timestamp="2017-04-19T05:47:07Z">BlueKnight</metadata>
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<metadata tag="submitter" timestamp="2017-06-22T17:24:59Z">whissi</metadata>
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</glsa>
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