Issued:

2015-06-04

Updated:

2015-06-04

RHSA-2015:1072 - Moderate: openssl security update

Synopsis

Moderate: openssl security update

Type/Severity

Security Advisory Moderate

Topic

Updated openssl packages that fix one security issue are now available for Red Hat Enterprise Linux 6 and 7.

Red Hat Product Security has rated this update as having Moderate security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link 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 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 do 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.

All openssl users are advised to upgrade to these updated packages, which contain a backported patch to correct this issue. 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-1.0.1e-30.el6_6.9.i686.rpm
• openssl-debuginfo-1.0.1e-42.el7_1.6.s390.rpm
• openssl-devel-1.0.1e-30.el6_6.9.s390x.rpm
• openssl-devel-1.0.1e-30.el6_6.9.ppc64.rpm
• openssl-debuginfo-1.0.1e-30.el6_6.9.i686.rpm
• openssl-1.0.1e-42.el7_1.6.x86_64.rpm
• openssl-debuginfo-1.0.1e-42.el7_1.6.s390x.rpm
• openssl-devel-1.0.1e-42.el7_1.6.ppc.rpm
• openssl-static-1.0.1e-30.el6_6.9.ppc64.rpm
• openssl-devel-1.0.1e-42.el7_1.6.ppc64.rpm
• openssl-libs-1.0.1e-42.el7_1.6.ppc.rpm
• openssl-debuginfo-1.0.1e-30.el6_6.9.ppc.rpm
• openssl-debuginfo-1.0.1e-30.el6_6.9.ppc64.rpm
• openssl-perl-1.0.1e-42.el7_1.6.s390x.rpm
• openssl-static-1.0.1e-42.el7_1.6.ppc.rpm
• openssl-static-1.0.1e-42.el7_1.6.i686.rpm
• openssl-perl-1.0.1e-30.el6_6.9.i686.rpm
• openssl-perl-1.0.1e-30.el6_6.9.ppc64.rpm
• openssl-libs-1.0.1e-42.el7_1.6.x86_64.rpm
• openssl-1.0.1e-30.el6_6.9.s390.rpm
• openssl-static-1.0.1e-42.el7_1.6.s390x.rpm
• openssl-perl-1.0.1e-30.el6_6.9.s390x.rpm
• openssl-debuginfo-1.0.1e-42.el7_1.6.ppc64.rpm
• openssl-devel-1.0.1e-42.el7_1.6.x86_64.rpm
• openssl-static-1.0.1e-30.el6_6.9.x86_64.rpm
• openssl-devel-1.0.1e-30.el6_6.9.s390.rpm
• openssl-devel-1.0.1e-30.el6_6.9.i686.rpm
• openssl-devel-1.0.1e-30.el6_6.9.ppc.rpm
• openssl-1.0.1e-30.el6_6.9.ppc64.rpm
• openssl-devel-1.0.1e-42.el7_1.6.i686.rpm
• openssl-libs-1.0.1e-42.el7_1.6.ppc64.rpm
• openssl-devel-1.0.1e-42.el7_1.6.s390.rpm
• openssl-perl-1.0.1e-30.el6_6.9.x86_64.rpm
• openssl-debuginfo-1.0.1e-42.el7_1.6.ppc.rpm
• openssl-debuginfo-1.0.1e-42.el7_1.6.i686.rpm
• openssl-perl-1.0.1e-42.el7_1.6.x86_64.rpm
• openssl-1.0.1e-30.el6_6.9.x86_64.rpm
• openssl-debuginfo-1.0.1e-42.el7_1.6.x86_64.rpm
• openssl-debuginfo-1.0.1e-30.el6_6.9.s390.rpm
• openssl-1.0.1e-42.el7_1.6.ppc64.rpm
• openssl-1.0.1e-30.el6_6.9.ppc.rpm
• openssl-debuginfo-1.0.1e-30.el6_6.9.x86_64.rpm
• openssl-debuginfo-1.0.1e-30.el6_6.9.s390x.rpm
• openssl-static-1.0.1e-42.el7_1.6.x86_64.rpm
• openssl-libs-1.0.1e-42.el7_1.6.i686.rpm
• openssl-perl-1.0.1e-42.el7_1.6.ppc64.rpm
• openssl-static-1.0.1e-30.el6_6.9.s390x.rpm
• openssl-1.0.1e-42.el7_1.6.s390x.rpm
• openssl-static-1.0.1e-30.el6_6.9.i686.rpm
• openssl-static-1.0.1e-42.el7_1.6.s390.rpm
• openssl-devel-1.0.1e-42.el7_1.6.s390x.rpm
• openssl-1.0.1e-30.el6_6.9.src.rpm
• openssl-static-1.0.1e-42.el7_1.6.ppc64.rpm
• openssl-libs-1.0.1e-42.el7_1.6.s390.rpm
• openssl-devel-1.0.1e-30.el6_6.9.x86_64.rpm
• openssl-1.0.1e-30.el6_6.9.s390x.rpm
• openssl-libs-1.0.1e-42.el7_1.6.s390x.rpm

Fixes

• This content is not included.BZ - 1223211

CVEs

• CVE-2015-4000

References

• https://access.redhat.com/security/updates/classification/#moderate
• https://access.redhat.com/articles/1456263
• Content from www.openssl.org is not included.Content from www.openssl.org is not included.https://www.openssl.org/blog/blog/2015/05/20/logjam-freak-upcoming-changes/

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.