Cisco Security Advisory – Multiple Cisco products incorporate a version of the ntpd package. Versions of this package are affected by one or more vulnerabilities that could allow an unauthenticated, remote attacker to execute arbitrary code or create a denial of service (DoS) condition. On December 19, 2014, NTP.org and US-CERT released security advisories detailing two issues regarding weak cryptographic pseudorandom number generation (PRNG), three buffer overflow vulnerabilities, and an unhandled error condition with an unknown impact. Cisco will release free software updates that address these vulnerabilities. Workarounds that mitigate these vulnerabilities are available.