F5 Networks BIG-IP : NTP vulnerability (K17517)
High Nessus Plugin ID 91313
SynopsisThe remote device is missing a vendor-supplied security patch.
DescriptionMemory leak in the CRYPTO_ASSOC function in ntpd in NTP 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77 allows remote attackers to cause a denial of service (memory consumption). (CVE-2015-7701)
An attacker could send packets to ntpd that may, after several days of ongoing attack, cause it to run out of memory. There is no control plane exposure in the BIG-IP system when you use a default configuration, and this issue is exposed only when NTP is configured to use the Autokey security protocol.
SolutionUpgrade to one of the non-vulnerable versions listed in the F5 Solution K17517.