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CVE-2018-0174: Cisco IOS Software and Cisco IOS XE Software Improper Input Validation Vulnerability

criticalknown exploitedCVE-2018-0174
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 DHCP option 82 encapsulation functionality of Cisco IOS Software and Cisco IOS XE Software could allow for denial-of-service (DoS).

CSIRTS triage

vendor: Ciscoproduct: IOS and IOS XE SoftwareDenial of service
What
A vulnerability in the DHCP option 82 encapsulation functionality could allow for denial-of-service (DoS).
Who is affected
Users of Cisco IOS and IOS XE Software are affected by this vulnerability.
Urgency
Immediate action is required due to the critical nature of the vulnerability and confirmed exploitation.
Action
Apply the latest updates for Cisco IOS and IOS 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-2018-0174

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-2018-0174coverage & exploitation statusNVD · CVE.org

Recent advisories for Cisco IOS Software

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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