| <?xml version="1.0" encoding="UTF-8"?> |
| <!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd"> |
| <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. |
| </synopsis> |
| <product type="ebuild">libgcrypt,side-channel,elgamal</product> |
| <announced>August 29, 2014</announced> |
| <revised>August 29, 2014: 1</revised> |
| <bug>519396</bug> |
| <access>remote</access> |
| <affected> |
| <package name="dev-libs/libgcrypt" auto="yes" arch="*"> |
| <unaffected range="ge">1.5.4</unaffected> |
| <vulnerable range="lt">1.5.4</vulnerable> |
| </package> |
| </affected> |
| <background> |
| <p>Libgcrypt is a general purpose cryptographic library derived out of |
| GnuPG. |
| </p> |
| </background> |
| <description> |
| <p>A vulnerability in the implementation of ElGamal decryption procedures |
| of Libgcrypt leaks information to various side-channels. |
| </p> |
| </description> |
| <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> |
| </impact> |
| <workaround> |
| <p>There is no known workaround at this time.</p> |
| </workaround> |
| <resolution> |
| <p>All Libgcrypt users should upgrade to the latest version:</p> |
| |
| <code> |
| # emerge --sync |
| # emerge --ask --oneshot --verbose ">=dev-libs/libgcrypt-1.5.4" |
| </code> |
| |
| </resolution> |
| <references> |
| <uri link="http://nvd.nist.gov/nvd.cfm?cvename=CVE-2014-5270">CVE-2014-5270</uri> |
| </references> |
| <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> |
| </glsa> |