Cisco IOS IKEv1 Packet Handling Remote Information Disclosure (cisco-sa-20160916-ikev1) (BENIGNCERTAIN)
Medium Nessus Plugin ID 93736
SynopsisThe remote device is missing a vendor-supplied security patch.
DescriptionAccording to its self-reported version and configuration, the Cisco IOS software running on the remote device is affected by an information disclosure vulnerability, known as BENIGNCERTAIN, in the Internet Key Exchange version 1 (IKEv1) subsystem due to improper handling of IKEv1 security negotiation requests. An unauthenticated, remote attacker can exploit this issue, via a specially crafted IKEv1 packet, to disclose memory contents, resulting in the disclosure of confidential information including credentials and configuration settings.
BENIGNCERTAIN is one of multiple Equation Group vulnerabilities and exploits disclosed on 2016/08/14 by a group known as the Shadow Brokers.
SolutionUpgrade to the relevant fixed version referenced in Cisco bug ID CSCvb29204.