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<define-tag description>LTS security update</define-tag>
<define-tag moreinfo>
<p>Multiple vulnerabilities have been discovered in OpenSSL, a Secure
Sockets Layer toolkit. The Common Vulnerabilities and Exposures project
identifies the following issues:</p>
<ul>
<li><a href="https://security-tracker.debian.org/tracker/CVE-2014-3570">CVE-2014-3570</a>
<p>Pieter Wuille of Blockstream reported that the bignum squaring
(BN_sqr) may produce incorrect results on some platforms, which
might make it easier for remote attackers to defeat cryptographic
protection mechanisms.</p></li>
<li><a href="https://security-tracker.debian.org/tracker/CVE-2014-3571">CVE-2014-3571</a>
<p>Markus Stenberg of Cisco Systems, Inc. reported that a carefully
crafted DTLS message can cause a segmentation fault in OpenSSL due
to a NULL pointer dereference. A remote attacker could use this flaw
to mount a denial of service attack.</p></li>
<li><a href="https://security-tracker.debian.org/tracker/CVE-2014-3572">CVE-2014-3572</a>
<p>Karthikeyan Bhargavan of the PROSECCO team at INRIA reported that an
OpenSSL client would accept a handshake using an ephemeral ECDH
ciphersuite if the server key exchange message is omitted. This
allows remote SSL servers to conduct ECDHE-to-ECDH downgrade attacks
and trigger a loss of forward secrecy.</p></li>
<li><a href="https://security-tracker.debian.org/tracker/CVE-2014-8275">CVE-2014-8275</a>
<p>Antti Karjalainen and Tuomo Untinen of the Codenomicon CROSS project
and Konrad Kraszewski of Google reported various certificate
fingerprint issues, which allow remote attackers to defeat a
fingerprint-based certificate-blacklist protection mechanism.</p></li>
<li><a href="https://security-tracker.debian.org/tracker/CVE-2015-0204">CVE-2015-0204</a>
<p>Karthikeyan Bhargavan of the PROSECCO team at INRIA reported that
an OpenSSL client will accept the use of an ephemeral RSA key in a
non-export RSA key exchange ciphersuite, violating the TLS
standard. This allows remote SSL servers to downgrade the security
of the session.</p></li>
</ul>
<p>For Debian 6 <q>Squeeze</q>, these issues have been fixed in openssl version 0.9.8o-4squeeze19</p>
</define-tag>
# do not modify the following line
#include "$(ENGLISHDIR)/lts/security/2015/dla-132.data"
# $Id$
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