CVE-2017-12232: Cisco IOS Software for Cisco Integrated Services Routers Denial-of-Service Vulnerability

CVE-2017-12232 · Severity: critical · CVSS 6.5 · Exploited in the wild · Published 2022-03-03

A vulnerability in Cisco IOS Software for Integrated Services Routers Generation 2 (ISR G2) allows an unauthenticated, adjacent attacker to cause a denial of service (DoS) by sending crafted Ethernet frames. The issue stems from a misclassification of Ethernet frames, which causes the affected device to reload.

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

Quick answers

Is CVE-2017-12232 exploited in the wild?
Yes. CVE-2017-12232 is known to be exploited in the wild, first recorded on 3 March 2022. Treat it as urgent.
How severe is CVE-2017-12232?
Critical severity, with a CVSS score of 6.5, published 3 March 2022.
Which products and versions are affected?
Cisco IOS 15.0 through 15.6; Cisco Integrated Services Routers Generation 2 (ISR G2) Routers.
Is there a fix for CVE-2017-12232?
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-2017-12232 attacked?
It is attacked from the adjacent network, in device firmware.
Am I affected by CVE-2017-12232?
Check whether you run Cisco IOS, Cisco Ios Software or Cisco IOS XE. 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 Integrated Services Routers Generation 2 (ISR G2) Routers

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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