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
SynopsisThe remote Scientific Linux host is missing one or more security updates.
DescriptionThis 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 188.8.131.52, 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.
SolutionUpdate the affected packages.