Issued:

2016-03-01

Updated:

2016-03-01

RHSA-2016:0305 - Important: openssl security update

Synopsis

Important: openssl security update

Type/Severity

Security Advisory Important

Topic

Updated openssl packages that fix two security issues are now available for Red Hat Enterprise Linux 6.6 and 7.1 Extended Update Support.

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.

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. 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)

Red Hat would like to thank the OpenSSL project for reporting these issues. Upstream acknowledges Nimrod Aviram and Sebastian Schinzel as the original reporters.

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.

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

Affected Products

Updated Packages

• openssl-devel-1.0.1e-42.el7_1.10.s390.rpm
• openssl-static-1.0.1e-42.el7_1.10.s390.rpm
• openssl-devel-1.0.1e-30.el6_6.12.s390x.rpm
• openssl-static-1.0.1e-42.el7_1.10.ppc64.rpm
• openssl-debuginfo-1.0.1e-30.el6_6.12.s390x.rpm
• openssl-1.0.1e-42.el7_1.10.s390x.rpm
• openssl-libs-1.0.1e-42.el7_1.10.s390.rpm
• openssl-devel-1.0.1e-30.el6_6.12.x86_64.rpm
• openssl-devel-1.0.1e-30.el6_6.12.i686.rpm
• openssl-static-1.0.1e-30.el6_6.12.x86_64.rpm
• openssl-perl-1.0.1e-42.el7_1.10.s390x.rpm
• openssl-perl-1.0.1e-30.el6_6.12.ppc64.rpm
• openssl-debuginfo-1.0.1e-30.el6_6.12.ppc.rpm
• openssl-debuginfo-1.0.1e-30.el6_6.12.i686.rpm
• openssl-debuginfo-1.0.1e-42.el7_1.10.ppc64.rpm
• openssl-static-1.0.1e-42.el7_1.10.i686.rpm
• openssl-1.0.1e-42.el7_1.10.x86_64.rpm
• openssl-1.0.1e-30.el6_6.12.ppc.rpm
• openssl-static-1.0.1e-30.el6_6.12.s390x.rpm
• openssl-debuginfo-1.0.1e-42.el7_1.10.i686.rpm
• openssl-1.0.1e-30.el6_6.12.i686.rpm
• openssl-static-1.0.1e-42.el7_1.10.ppc.rpm
• openssl-1.0.1e-30.el6_6.12.s390.rpm
• openssl-1.0.1e-42.el7_1.10.ppc64.rpm
• openssl-perl-1.0.1e-42.el7_1.10.ppc64.rpm
• openssl-perl-1.0.1e-30.el6_6.12.x86_64.rpm
• openssl-libs-1.0.1e-42.el7_1.10.ppc64.rpm
• openssl-static-1.0.1e-42.el7_1.10.s390x.rpm
• openssl-devel-1.0.1e-30.el6_6.12.s390.rpm
• openssl-libs-1.0.1e-42.el7_1.10.i686.rpm
• openssl-devel-1.0.1e-30.el6_6.12.ppc.rpm
• openssl-static-1.0.1e-30.el6_6.12.i686.rpm
• openssl-1.0.1e-30.el6_6.12.s390x.rpm
• openssl-static-1.0.1e-42.el7_1.10.x86_64.rpm
• openssl-devel-1.0.1e-30.el6_6.12.ppc64.rpm
• openssl-devel-1.0.1e-42.el7_1.10.s390x.rpm
• openssl-devel-1.0.1e-42.el7_1.10.ppc64.rpm
• openssl-libs-1.0.1e-42.el7_1.10.x86_64.rpm
• openssl-1.0.1e-30.el6_6.12.src.rpm
• openssl-debuginfo-1.0.1e-42.el7_1.10.s390x.rpm
• openssl-debuginfo-1.0.1e-42.el7_1.10.x86_64.rpm
• openssl-debuginfo-1.0.1e-42.el7_1.10.ppc.rpm
• openssl-1.0.1e-30.el6_6.12.x86_64.rpm
• openssl-perl-1.0.1e-42.el7_1.10.x86_64.rpm
• openssl-devel-1.0.1e-42.el7_1.10.ppc.rpm
• openssl-debuginfo-1.0.1e-30.el6_6.12.x86_64.rpm
• openssl-perl-1.0.1e-30.el6_6.12.i686.rpm
• openssl-debuginfo-1.0.1e-30.el6_6.12.s390.rpm
• openssl-devel-1.0.1e-42.el7_1.10.x86_64.rpm
• openssl-debuginfo-1.0.1e-42.el7_1.10.s390.rpm
• openssl-libs-1.0.1e-42.el7_1.10.s390x.rpm
• openssl-libs-1.0.1e-42.el7_1.10.ppc.rpm
• openssl-perl-1.0.1e-30.el6_6.12.s390x.rpm
• openssl-devel-1.0.1e-42.el7_1.10.i686.rpm
• openssl-debuginfo-1.0.1e-30.el6_6.12.ppc64.rpm
• openssl-static-1.0.1e-30.el6_6.12.ppc64.rpm
• openssl-1.0.1e-30.el6_6.12.ppc64.rpm

Fixes

• This content is not included.BZ - 1301846
• This content is not included.BZ - 1310593

CVEs

• CVE-2016-0800
• CVE-2015-3197

References

• https://access.redhat.com/security/updates/classification/#important
• https://access.redhat.com/articles/2176731
• Content from drownattack.com is not included.Content from drownattack.com is not included.https://drownattack.com/
• Content from openssl.org is not included.Content from openssl.org is not included.https://openssl.org/news/secadv/20160128.txt
• Content from openssl.org is not included.Content from openssl.org is not included.https://openssl.org/news/secadv/20160301.txt

Additional information

• The Red Hat security contact is This content is not included.secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.
• Offline Security Data data is available for integration with other systems. See Offline Security Data API to get started.