RHSA-2010:0978: openssl security update

Description

OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL v2/v3)and Transport Layer Security (TLS v1) protocols, as well as afull-strength, general purpose cryptography library.A ciphersuite downgrade flaw was found in the OpenSSL SSL/TLS server code.A remote attacker could possibly use this flaw to change the ciphersuiteassociated with a cached session stored on the server, if the serverenabled the SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG option, possiblyforcing the client to use a weaker ciphersuite after resuming the session.(CVE-2010-4180, CVE-2008-7270)Note: With this update, setting the SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUGoption has no effect and this bug workaround can no longer be enabled.All OpenSSL users should upgrade to these updated packages, which contain abackported patch to resolve these issues. For the update to take effect,all services linked to the OpenSSL library must be restarted, or the systemrebooted.