Cisco IOS XR Multiple ntpd Vulnerabilities
High Nessus Plugin ID 81912
SynopsisThe remote device is missing a vendor-supplied security patch.
DescriptionThe remote Cisco device is running a version of IOS XR software that is affected by the following vulnerabilities :
- Errors exist related to weak cryptographic pseudorandom number generation (PRNG), the functions 'ntp_random' and and 'config_auth', and the 'ntp-keygen' utility. A man-in-the-middle attacker can exploit these to disclose sensitive information. (CVE-2014-9293, CVE-2014-9294)
- Multiple stack-based buffer overflow errors exist in the Network Time Protocol daemon (ntpd), which a remote attacker can exploit to execute arbitrary code or cause a denial of service by using a specially crafted packet.
- An error exists in the 'receive' function in the Network Time Protocol daemon (ntpd) that allows denial of service attacks. (CVE-2014-9296)
SolutionApply the relevant patch or workaround referenced in Cisco bug ID CSCus26956.