Moderate CentOS openssl Security Update


openssl-1.0.1e-30.el6.9.i686.rpm, openssl-1.0.1e-30.el6.9.src.rpm, openssl-1.0.1e-30.el6.9.x86_64.rpm, openssl-1.0.1e-42.el7.6.src.rpm, openssl-1.0.1e-42.el7.6.x86_64.rpm, openssl-devel-1.0.1e-30.el6.9.i686.rpm, openssl-devel-1.0.1e-30.el6.9.x86_64.rpm, openssl-devel-1.0.1e-42.el7.6.i686.rpm, openssl-devel-1.0.1e-42.el7.6.x86_64.rpm, openssl-libs-1.0.1e-42.el7.6.i686.rpm, openssl-libs-1.0.1e-42.el7.6.x86_64.rpm, openssl-perl-1.0.1e-30.el6.9.i686.rpm, openssl-perl-1.0.1e-30.el6.9.x86_64.rpm, openssl-perl-1.0.1e-42.el7.6.x86_64.rpm, openssl-static-1.0.1e-30.el6.9.i686.rpm, openssl-static-1.0.1e-30.el6.9.x86_64.rpm, openssl-static-1.0.1e-42.el7.6.i686.rpm, openssl-static-1.0.1e-42.el7.6.x86_64.rpm,,
2018-01-18 11:09
2017-07-27 19:09
2017-04-01 19:09
2017-01-05 20:13


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.

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.
Please see

Am I vulnerable?

The constraints below list the versions that this vulnerability is patched in, and versions that are unaffected. If a patch is ready but unrealeased, then it is pending.

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Affected package information

Release Package Patched in
6 openssl openssl-1.0.1e-30.el6.9.src.rpm
openssl openssl-1.0.1e-30.el6.9.x86_64.rpm
openssl openssl-1.0.1e-30.el6.9.i686.rpm
openssl-devel openssl-devel-1.0.1e-30.el6.9.i686.rpm
openssl-devel openssl-devel-1.0.1e-30.el6.9.x86_64.rpm
openssl-perl openssl-perl-1.0.1e-30.el6.9.x86_64.rpm
openssl-perl openssl-perl-1.0.1e-30.el6.9.i686.rpm
openssl-static openssl-static-1.0.1e-30.el6.9.i686.rpm
openssl-static openssl-static-1.0.1e-30.el6.9.x86_64.rpm
7 openssl openssl-1.0.1e-42.el7.6.src.rpm
openssl openssl-1.0.1e-42.el7.6.x86_64.rpm
openssl-devel openssl-devel-1.0.1e-42.el7.6.i686.rpm
openssl-devel openssl-devel-1.0.1e-42.el7.6.x86_64.rpm
openssl-libs openssl-libs-1.0.1e-42.el7.6.i686.rpm
openssl-libs openssl-libs-1.0.1e-42.el7.6.x86_64.rpm
openssl-perl openssl-perl-1.0.1e-42.el7.6.x86_64.rpm
openssl-static openssl-static-1.0.1e-42.el7.6.i686.rpm
openssl-static openssl-static-1.0.1e-42.el7.6.x86_64.rpm