CVE-2017-12237: Cisco IOS and IOS XE Software Internet Key Exchange Denial-of-Service Vulnerability

CVE-2017-12237 · Severity: critical · CVSS 7.5 · Exploited in the wild · Published 2022-03-03

A vulnerability in the Internet Key Exchange Version 2 (IKEv2) module of Cisco IOS and IOS XE could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. The issue is triggered by processing specific IKEv2 packets, leading to high CPU utilization, traceback messages, or a device reload.

Technologies: Cisco IOS, Cisco IOS XE, Cisco IOS XE Software, Cisco IOS XR. Vendors: Cisco.

Quick answers

Is CVE-2017-12237 exploited in the wild?
Yes. CVE-2017-12237 is known to be exploited in the wild, first recorded on 3 March 2022. Treat it as urgent.
How severe is CVE-2017-12237?
Critical severity, with a CVSS score of 7.5, published 3 March 2022.
Which products and versions are affected?
Cisco IOS 15.0 through 15.6; Cisco IOS XE 3.5 through 16.5.
Is there a fix for CVE-2017-12237?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2017-12237 attacked?
It is attacked over the network, in an operating system.
Am I affected by CVE-2017-12237?
Check whether you run Cisco IOS, Cisco IOS XE, Cisco IOS XE Software or one of the others listed. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Affected products

  • Cisco IOS 15.0 through 15.6
  • Cisco IOS XE 3.5 through 16.5

Timeline

  • 2017-09-27: disclosed: Original Cisco advisory date (from reference URL)
  • 2022-03-03: kev added: Added to CISA Known Exploited Vulnerabilities Catalog

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