| Description: | OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL),Transport Layer Security (TLS), and Datagram Transport Layer Security(DTLS) protocols, as well as a full-strength, general purpose cryptographylibrary.This update adds support for the TLS Fallback Signaling Cipher Suite Value(TLS_FALLBACK_SCSV), which can be used to prevent protocol downgradeattacks against applications which re-connect using a lower SSL/TLSprotocol version when the initial connection indicating the highestsupported 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 oracleattack when using block cipher suites in cipher block chaining (CBC) mode.This issue is identified as CVE-2014-3566, and also known under the aliasPOODLE. This SSL 3.0 protocol flaw will not be addressed in a futureupdate; it is recommended that users configure their applications torequire at least TLS protocol version 1.0 for secure communication.For additional information about this flaw, see the Knowledgebase articleat https://access.redhat.com/articles/1232123All OpenSSL users are advised to upgrade to these updated packages, whichcontain a backported patch to mitigate the CVE-2014-3566 issue. For theupdate to take effect, all services linked to the OpenSSL library (such ashttpd and other SSL-enabled services) must be restarted or the systemrebooted. |