Cisco Catalyst Bidirectional Forwarding Detection Denial-of-Service Vulnerability

Technical Severity

CVSS v3.1 Metrics

HIGH

8.6 / 10

Minimal Risk Critical

Vector Specification

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Exploitation Likelihood

EPSS Prediction

14.50 %

Predictive Probability

Percentile Rank

94.4 th

Documented as more likely to be exploited than 94.4% of known CVEs.

Detection Date

Mar 03, 2022

Remediation Due

Mar 17, 2022

CISA Catalog Active

Threat Analysis

A vulnerability in the Bidirectional Forwarding Detection (BFD) offload implementation of Cisco Catalyst 4500 Series Switches and Cisco Catalyst 4500-X Series Switches could allow an unauthenticated, remote attacker to cause a crash of the iosd process, causing a denial-of-service (DoS) condition.

Remediation Directive

Apply updates per vendor instructions.

External Intelligence

NVD

National Vulnerability Database

https://nvd.nist.gov/vuln/detail/CVE-2018-0155