Cisco IOS and IOS XE Software Internet Key Exchange Denial-of-Service Vulnerability (CVE-2017-12237)
Severity: high · Patch status: patched · Since 2022-03-03 · CVE-2017-12237
A vulnerability in the Internet Key Exchange Version 2 (IKEv2) module of Cisco IOS and Cisco IOS XE could allow an unauthenticated, remote attacker to cause high CPU utilization, traceback messages, or a reload of an affected device that leads to a denial of service. CISA added CVE-2017-12237 to its Known Exploited Vulnerabilities catalog on Mar 3, 2022, which means attackers are exploiting it in the wild.
What to do
- Apply updates per vendor instructions.
- US federal agencies must remediate by Mar 24, 2022 (BOD 22-01); treat that as the outer limit.
Sources
All live incidents on Threat Watch
