CVE-2017-12237 is a denial-of-service vulnerability in the IKEv2 module of Cisco IOS and IOS XE, affecting devices with ISAKMP enabled, even without IKEv2-specific configurations. An unauthenticated, remote attacker can exploit this by sending crafted IKEv2 packets, leading to high CPU utilization, traceback messages, or device reloads. With a CVSS score of 7.5 (High), this vulnerability is easily exploitable over the network with low attack complexity, resulting in a complete loss of availability. This CVE is listed in CISA's KEV catalog, indicating active exploitation, despite a lack of public exploit code or significant community discussion.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 15.0, <= 15.6CPE matchmatch criteria | cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:* | ||
>= 3.5.0e, <= 16.5CPE matchmatch criteria | cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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