Scientific Linux Security Update : nss, nss-util, and nss-softokn on SL5.x, SL6.x, SL7.x i386/x86_64 (POODLE)

Medium Nessus Plugin ID 79713


The remote Scientific Linux host is missing one or more security updates.


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 communication.

The nss, nss-util, and nss-softokn packages have been upgraded to upstream version, which provides a number of bug fixes and enhancements over the previous version, and adds the support for Mozilla Firefox 31.3.

After installing this update, applications using NSS or NSPR must be restarted for this update to take effect.


Update the affected packages.

See Also

Plugin Details

Severity: Medium

ID: 79713

File Name: sl_20141202_nss__nss_util__and_nss_softokn_on_SL5_x.nasl

Version: $Revision: 1.6 $

Type: local

Agent: unix

Published: 2014/12/04

Modified: 2016/10/19

Dependencies: 12634

Risk Information

Risk Factor: Medium


Base Score: 4.3

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:N/A:N


Base Score: 3.1

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N

Vulnerability Information

CPE: x-cpe:/o:fermilab:scientific_linux

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/RedHat/release, Host/RedHat/rpm-list

Patch Publication Date: 2014/12/02

Reference Information

CVE: CVE-2014-3566