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CVE-2018-0155: Cisco Catalyst Bidirectional Forwarding Detection Denial-of-Service Vulnerability

criticalknown exploitedCVE-2018-0155
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
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.

CSIRTS triage

vendor: Ciscoproduct: Catalyst SwitchesDenial of service
What
A vulnerability in the Bidirectional Forwarding Detection offload implementation could allow an unauthenticated, remote attacker to cause a denial-of-service condition.
Who is affected
Users of Cisco Catalyst 4500 Series and 4500-X Series Switches.
Urgency
Remediation is urgent due to active exploitation and critical severity.
Action
Update Cisco Catalyst Switches to the latest version.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2022-03-03
Exploitation
Observed in the wild (CISA KEV)

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

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2018-0155coverage & exploitation statusNVD · CVE.org

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