CVE-2018-0155 · Severity: critical · CVSS 8.6 · Exploited in the wild · Published 2022-03-03
A vulnerability in the Bidirectional Forwarding Detection (BFD) offload implementation of Cisco Catalyst switches could allow an unauthenticated, remote attacker to cause a denial-of-service (DoS) condition. The flaw is due to insufficient error handling of incomplete BFD headers, which can be exploited by sending crafted BFD packets to trigger a reload of the system.
Yes. CVE-2018-0155 is known to be exploited in the wild, first recorded on 3 March 2022. Treat it as urgent.
How severe is CVE-2018-0155?
Critical severity, with a CVSS score of 8.6, published 3 March 2022.
Which products and versions are affected?
Cisco Catalyst 4500 Series Switches; Cisco Catalyst 4500-X Series Switches; Cisco Catalyst 4900M Switch; Cisco Catalyst 4948E Ethernet Switch; and 2 more.
Is there a fix for CVE-2018-0155?
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-2018-0155 attacked?
It is attacked over the network, in an operating system.
Am I affected by CVE-2018-0155?
Check whether you run Cisco Catalyst 4500 Series Switches, Cisco Catalyst 4500-X Series Switches or Cisco Catalyst 4500-X 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 Catalyst 4500 Series Switches
Cisco Catalyst 4500-X Series Switches
Cisco Catalyst 4900M Switch
Cisco Catalyst 4948E Ethernet Switch
Cisco IOS
Cisco IOS XE
Timeline
2018-03-28: advisory: Initial Cisco Security Advisory published
2022-03-03: kev added: Added to CISA Known Exploited Vulnerabilities Catalog