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CVE-2018-0167: Cisco IOS, XR, and XE Software Buffer Overflow Vulnerability

criticalknown exploitedCVE-2018-0167
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.
There is a buffer overflow vulnerability in the Link Layer Discovery Protocol (LLDP) subsystem of Cisco IOS Software, Cisco IOS XE Software, and Cisco IOS XR Software which could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition or execute arbitrary code.

CSIRTS triage

vendor: Ciscoproduct: IOS, XR, and XE SoftwareDenial of serviceRemote code execution
What
A buffer overflow vulnerability in the LLDP subsystem could allow an attacker to cause a denial of service or execute arbitrary code.
Who is affected
Users of Cisco IOS, XR, and XE Software are affected by this vulnerability.
Urgency
Remediation is critical due to the severity and exploitation status of the vulnerability.
Action
Apply the latest patches for Cisco IOS, XR, and XE Software.

AI-assisted analysis generated from the source advisory — verify against the original.

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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-2018-0167

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-2018-0167coverage & exploitation statusNVD · CVE.org

Recent advisories for Cisco IOS

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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