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<?xml version="1.0" encoding="UTF-8"?>
<glsa id="201408-10">
<title>Libgcrypt: Side-channel attack</title>
<synopsis>A vulnerability in Libgcrypt could allow a remote attacker to
extract ElGamal private key information.
<product type="ebuild">libgcrypt,side-channel,elgamal</product>
<announced>August 29, 2014</announced>
<revised>August 29, 2014: 1</revised>
<package name="dev-libs/libgcrypt" auto="yes" arch="*">
<unaffected range="ge">1.5.4</unaffected>
<vulnerable range="lt">1.5.4</vulnerable>
<p>Libgcrypt is a general purpose cryptographic library derived out of
<p>A vulnerability in the implementation of ElGamal decryption procedures
of Libgcrypt leaks information to various side-channels.
<impact type="normal">
<p>A physical side-channel attack allows a remote attacker to fully extract
decryption keys during the decryption of a chosen ciphertext.
<p>There is no known workaround at this time.</p>
<p>All Libgcrypt users should upgrade to the latest version:</p>
# emerge --sync
# emerge --ask --oneshot --verbose "&gt;=dev-libs/libgcrypt-1.5.4"
<uri link="">CVE-2014-5270</uri>
<metadata tag="requester" timestamp="Sun, 24 Aug 2014 09:53:40 +0000">K_F</metadata>
<metadata tag="submitter" timestamp="Fri, 29 Aug 2014 10:08:01 +0000">K_F</metadata>