New Search

RHSA-2014:1948 -- nss nss-util and nss-softokn security bug fix and enhancement update (Important)


Network Security Services (NSS) is a set of libraries designed to support the cross-platform development of security-enabled client and server applications. Netscape Portable Runtime (NSPR) provides platform independence for non-GUI operating system facilities. 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.

  • Red Hat Enterprise Linux 5
  • CentOS Linux 5
  • CentOS Linux 7
  • Red Hat Enterprise Linux 6
  • CentOS Linux 6
  • Red Hat Enterprise Linux 7
  • RHSA-2014:1948
  • CESA-2014:1948-CentOS 5
  • CESA-2014:1948-CentOS 6
  • CESA-2014:1948-CentOS 7
  • nss