CVE-2017-12238: Cisco Catalyst 6800 Series Switches VPLS Denial-of-Service Vulnerability
CVE-2017-12238 · Severity: critical · CVSS 6.5 · Exploited in the wild · Published 2022-03-03
A memory management vulnerability in the Virtual Private LAN Service (VPLS) code of Cisco IOS could allow an unauthenticated, adjacent attacker to cause a denial of service. By generating a large number of VPLS MAC entries, an attacker can cause C6800-16P10G or C6800-16P10G-XL line cards to crash on Catalyst 6800 Series Switches equipped with Supervisor Engine 6T.
Yes. CVE-2017-12238 is known to be exploited in the wild, first recorded on 3 March 2022. Treat it as urgent.
How severe is CVE-2017-12238?
Critical severity, with a CVSS score of 6.5, published 3 March 2022.
Which products and versions are affected?
Cisco IOS 15.0 through 15.4; Cisco Catalyst 6800 Series Switches; Cisco C6800-16P10G Line Card; Cisco C6800-16P10G-XL Line Card.
Is there a fix for CVE-2017-12238?
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-2017-12238 attacked?
It is attacked from the adjacent network, in an operating system.
Am I affected by CVE-2017-12238?
Check whether you run Cisco Catalyst 6800 Series Switches. 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 15.4
Cisco Catalyst 6800 Series Switches
Cisco C6800-16P10G Line Card
Cisco C6800-16P10G-XL Line Card
Timeline
2017-09-27: disclosed: Original Cisco advisory date based on URL and reference data
2022-03-03: kev added: Date added to CISA Known Exploited Vulnerabilities Catalog
2022-03-03: exploited: Vulnerability confirmed as exploited in the wild per CISA KEV entry