This script is Copyright (C) 2014-2016 Tenable Network Security, Inc.
The remote Scientific Linux host is missing one or more security
This update adds support for the TLS Fallback Signaling Cipher Suite
Value (TLS_FALLBACK_SCSV), which can be used to prevent protocol
downgrade attacks against applications which re-connect using a lower
SSL/TLS protocol version when the initial connection indicating the
highest supported protocol version fails.
This can prevent a forceful downgrade of the communication to SSL 3.0.
The SSL 3.0 protocol was found to be vulnerable to the padding oracle
attack when using block cipher suites in cipher block chaining (CBC)
mode. This issue is identified as CVE-2014-3566, and also known under
the alias POODLE. This SSL 3.0 protocol flaw will not be addressed in
a future update; it is recommended that users configure their
applications to require at least TLS protocol version 1.0 for secure
For additional information about this flaw, see Upstream's
Knowledgebase article at https://access.redhat.com/articles/1232123
A memory leak flaw was found in the way OpenSSL parsed the DTLS Secure
Real-time Transport Protocol (SRTP) extension data. A remote attacker
could send multiple specially crafted handshake messages to exhaust
all available memory of an SSL/TLS or DTLS server. (CVE-2014-3513)
A memory leak flaw was found in the way an OpenSSL handled failed
session ticket integrity checks. A remote attacker could exhaust all
available memory of an SSL/TLS or DTLS server by sending a large
number of invalid session tickets to that server. (CVE-2014-3567)
CVE-2014-3566 issue and correct the CVE-2014-3513 and CVE-2014-3567
issues. For the update to take effect, all services linked to the
OpenSSL library (such as httpd and other SSL-enabled services) must be
restarted or the system rebooted.
See also :
Update the affected packages.
Risk factor :
High / CVSS Base Score : 7.1