[RHSA-2016:0302-01] Important: openssl security update

[news 28]

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Red Hat Security Advisory

 

Synopsis: Important: openssl security update

Advisory ID: RHSA-2016:0302-01

Product: Red Hat Enterprise Linux

Advisory URL: https://rhn.redhat.com/errata/RHSA-2016-0302.html

Issue date: 2016-03-01

CVE Names: CVE-2015-3197 CVE-2016-0797 CVE-2016-0800

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1. Summary:

 

Updated openssl packages that fix three security issues are now available

for Red Hat Enterprise Linux 5

 

Red Hat Product Security has rated this update as having Important security

impact. Common Vulnerability Scoring System (CVSS) base scores, which give

detailed severity ratings, are available for each vulnerability from the

CVE links in the References section.

 

2. Relevant releases/architectures:

 

Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64

Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64

Red Hat Enterprise Linux Desktop Workstation (v. 5 client) - i386, x86_64

 

3. Description:

 

OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL v2/v3)

and Transport Layer Security (TLS v1) protocols, as well as a

full-strength, general purpose cryptography library.

 

A padding oracle flaw was found in the Secure Sockets Layer version 2.0

(SSLv2) protocol. An attacker can potentially use this flaw to decrypt

RSA-encrypted cipher text from a connection using a newer SSL/TLS protocol

version, allowing them to decrypt such connections. This cross-protocol

attack is publicly referred to as DROWN. (CVE-2016-0800)

 

Note: This issue was addressed by disabling the SSLv2 protocol by default

when using the 'SSLv23' connection methods, and removing support for weak

SSLv2 cipher suites. It is possible to re-enable the SSLv2 protocol in the

'SSLv23' connection methods by default by setting the OPENSSL_ENABLE_SSL2

environment variable before starting an application that needs to have

SSLv2 enabled. For more information, refer to the knowledge base article

linked to in the References section.

 

A flaw was found in the way malicious SSLv2 clients could negotiate SSLv2

ciphers that have been disabled on the server. This could result in weak

SSLv2 ciphers being used for SSLv2 connections, making them vulnerable to

man-in-the-middle attacks. (CVE-2015-3197)

 

An integer overflow flaw, leading to a NULL pointer dereference or a

heap-based memory corruption, was found in the way some BIGNUM functions of

OpenSSL were implemented. Applications that use these functions with large

untrusted input could crash or, potentially, execute arbitrary code.

(CVE-2016-0797)

 

Red Hat would like to thank the OpenSSL project for reporting these issues.

Upstream acknowledges Nimrod Aviram and Sebastian Schinzel as the original

reporters of CVE-2016-0800 and CVE-2015-3197; and Guido Vranken as the

original reporter of CVE-2016-0797.

 

All openssl users are advised to upgrade to these updated packages, which

contain backported patches to correct these issues. For the update to take

effect, all services linked to the OpenSSL library must be restarted, or

the system rebooted.

 

4. Solution:

 

Before applying this update, make sure all previously released errata

relevant to your system have been applied.

 

For details on how to apply this update, refer to:

 

https://access.redhat.com/articles/11258

 

5. Bugs fixed (https://bugzilla.redhat.com/):

 

1301846 - CVE-2015-3197 OpenSSL: SSLv2 doesn't block disabled ciphers

1310593 - CVE-2016-0800 SSL/TLS: Cross-protocol attack on TLS using SSLv2 (DROWN)

1311880 - CVE-2016-0797 OpenSSL: BN_hex2bn/BN_dec2bn NULL pointer deref/heap corruption

 

6. Package List:

 

Red Hat Enterprise Linux Desktop (v. 5 client):

 

Source:

openssl-0.9.8e-39.el5_11.src.rpm

 

i386:

openssl-0.9.8e-39.el5_11.i386.rpm

openssl-0.9.8e-39.el5_11.i686.rpm

openssl-debuginfo-0.9.8e-39.el5_11.i386.rpm

openssl-debuginfo-0.9.8e-39.el5_11.i686.rpm

openssl-perl-0.9.8e-39.el5_11.i386.rpm

 

x86_64:

openssl-0.9.8e-39.el5_11.i686.rpm

openssl-0.9.8e-39.el5_11.x86_64.rpm

openssl-debuginfo-0.9.8e-39.el5_11.i686.rpm

openssl-debuginfo-0.9.8e-39.el5_11.x86_64.rpm

openssl-perl-0.9.8e-39.el5_11.x86_64.rpm

 

Red Hat Enterprise Linux Desktop Workstation (v. 5 client):

 

Source:

openssl-0.9.8e-39.el5_11.src.rpm

 

i386:

openssl-debuginfo-0.9.8e-39.el5_11.i386.rpm

openssl-devel-0.9.8e-39.el5_11.i386.rpm

 

x86_64:

openssl-debuginfo-0.9.8e-39.el5_11.i386.rpm

openssl-debuginfo-0.9.8e-39.el5_11.x86_64.rpm

openssl-devel-0.9.8e-39.el5_11.i386.rpm

openssl-devel-0.9.8e-39.el5_11.x86_64.rpm

 

Red Hat Enterprise Linux (v. 5 server):

 

Source:

openssl-0.9.8e-39.el5_11.src.rpm

 

i386:

openssl-0.9.8e-39.el5_11.i386.rpm

openssl-0.9.8e-39.el5_11.i686.rpm

openssl-debuginfo-0.9.8e-39.el5_11.i386.rpm

openssl-debuginfo-0.9.8e-39.el5_11.i686.rpm

openssl-devel-0.9.8e-39.el5_11.i386.rpm

openssl-perl-0.9.8e-39.el5_11.i386.rpm

 

ia64:

openssl-0.9.8e-39.el5_11.i686.rpm

openssl-0.9.8e-39.el5_11.ia64.rpm

openssl-debuginfo-0.9.8e-39.el5_11.i686.rpm

openssl-debuginfo-0.9.8e-39.el5_11.ia64.rpm

openssl-devel-0.9.8e-39.el5_11.ia64.rpm

openssl-perl-0.9.8e-39.el5_11.ia64.rpm

 

ppc:

openssl-0.9.8e-39.el5_11.ppc.rpm

openssl-0.9.8e-39.el5_11.ppc64.rpm

openssl-debuginfo-0.9.8e-39.el5_11.ppc.rpm

openssl-debuginfo-0.9.8e-39.el5_11.ppc64.rpm

openssl-devel-0.9.8e-39.el5_11.ppc.rpm

openssl-devel-0.9.8e-39.el5_11.ppc64.rpm

openssl-perl-0.9.8e-39.el5_11.ppc.rpm

 

s390x:

openssl-0.9.8e-39.el5_11.s390.rpm

openssl-0.9.8e-39.el5_11.s390x.rpm

openssl-debuginfo-0.9.8e-39.el5_11.s390.rpm

openssl-debuginfo-0.9.8e-39.el5_11.s390x.rpm

openssl-devel-0.9.8e-39.el5_11.s390.rpm

openssl-devel-0.9.8e-39.el5_11.s390x.rpm

openssl-perl-0.9.8e-39.el5_11.s390x.rpm

 

x86_64:

openssl-0.9.8e-39.el5_11.i686.rpm

openssl-0.9.8e-39.el5_11.x86_64.rpm

openssl-debuginfo-0.9.8e-39.el5_11.i386.rpm

openssl-debuginfo-0.9.8e-39.el5_11.i686.rpm

openssl-debuginfo-0.9.8e-39.el5_11.x86_64.rpm

openssl-devel-0.9.8e-39.el5_11.i386.rpm

openssl-devel-0.9.8e-39.el5_11.x86_64.rpm

openssl-perl-0.9.8e-39.el5_11.x86_64.rpm

 

These packages are GPG signed by Red Hat for security. Our key and

details on how to verify the signature are available from

https://access.redhat.com/security/team/key/

 

7. References:

 

https://access.redhat.com/security/cve/CVE-2015-3197

https://access.redhat.com/security/cve/CVE-2016-0797

https://access.redhat.com/security/cve/CVE-2016-0800

https://access.redhat.com/security/updates/classification/#important

https://access.redhat.com/articles/2176731

https://drownattack.com/

https://openssl.org/news/secadv/20160128.txt

https://openssl.org/news/secadv/20160301.txt

 

8. Contact:

 

The Red Hat security contact is . More contact

details at https://access.redhat.com/security/team/contact/

 

Copyright 2016 Red Hat, Inc.

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