Red Hat Security Advisory 2013-1841-01 - Network Security Services is a set of libraries designed to support the cross-platform development of security-enabled client and server applications. A flaw was found in the way NSS handled invalid handshake packets. A remote attacker could use this flaw to cause a TLS/SSL client using NSS to crash or, possibly, execute arbitrary code with the privileges of the user running the application. All NSS users should upgrade to these updated packages, which contain a backported patch to correct this issue. After installing this update, applications using NSS must be restarted for the changes to take effect.
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