Scientific Linux SL5: SLSA-2015:1197-1 Moderate: OpenSSL Key Exchange Flaw

Date: Tue, 30 Jun 2015 16:31:43 +0000
Reply-To: scientific-linux-users@
Sender: Security Errata for Scientific Linux
 
From: Pat Riehecky 
Subject: Security ERRATA Moderate: openssl on SL5.x i386/x86_64
MIME-Version: 1.0
Message-ID: <20150630163143.21722.7898@slpackages.fnal.gov>

Synopsis: Moderate: openssl security update
Advisory ID: SLSA-2015:1197-1
Issue Date: 2015-06-30
CVE Numbers: CVE-2015-4000
 CVE-2015-1789
 CVE-2015-1790
--

An out-of-bounds read flaw was found in the X509_cmp_time() function of
OpenSSL. A specially crafted X.509 certificate or a Certificate Revocation
List (CRL) could possibly cause a TLS/SSL server or client using OpenSSL
to crash. (CVE-2015-1789)

A NULL pointer dereference was found in the way OpenSSL handled certain
PKCS#7 inputs. A specially crafted PKCS#7 input with missing
EncryptedContent data could cause an application using OpenSSL to crash.
(CVE-2015-1790)

A flaw was found in the way the TLS protocol composes the Diffie-Hellman
(DH) key exchange. A man-in-the-middle attacker could use this flaw to
force the use of weak 512 bit export-grade keys during the key exchange,
allowing them to decrypt all traffic. (CVE-2015-4000)

Note: This update forces the TLS/SSL client implementation in OpenSSL to
reject DH key sizes below 768 bits, which prevents sessions to be
downgraded to export-grade keys. Future updates may raise this limit to
1024 bits.

For the update to take effect, all services linked to the OpenSSL library
must be restarted, or the system rebooted.
--

SL5
 x86_64
 openssl-0.9.8e-36.el5_11.i686.rpm
 openssl-0.9.8e-36.el5_11.x86_64.rpm
 openssl-debuginfo-0.9.8e-36.el5_11.i686.rpm
 openssl-debuginfo-0.9.8e-36.el5_11.x86_64.rpm
 openssl-perl-0.9.8e-36.el5_11.x86_64.rpm
 openssl-debuginfo-0.9.8e-36.el5_11.i386.rpm
 openssl-devel-0.9.8e-36.el5_11.i386.rpm
 openssl-devel-0.9.8e-36.el5_11.x86_64.rpm
 i386
 openssl-0.9.8e-36.el5_11.i386.rpm
 openssl-0.9.8e-36.el5_11.i686.rpm
 openssl-debuginfo-0.9.8e-36.el5_11.i386.rpm
 openssl-debuginfo-0.9.8e-36.el5_11.i686.rpm
 openssl-perl-0.9.8e-36.el5_11.i386.rpm
 openssl-devel-0.9.8e-36.el5_11.i386.rpm

- Scientific Linux Development Team