This script is Copyright (C) 2015-2017 Tenable Network Security, Inc.
The remote Red Hat host is missing one or more security updates.
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.
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.
See also :
Update the affected packages.
Risk factor :
Medium / CVSS Base Score : 4.3
CVSS Temporal Score : 3.7
Public Exploit Available : true