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CVE-2017-6627: Cisco IOS Software and Cisco IOS XE Software UDP Packet Processing Denial-of-Service Vulnerability

criticalknown exploitedCVE-2017-6627
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 UDP processing code of Cisco IOS and IOS XE could allow an unauthenticated, remote attacker to cause the input queue of an affected system to hold UDP packets, causing an interface queue wedge and denial of service.

CSIRTS triage

vendor: Ciscoproduct: IOS and IOS XE SoftwareDenial of service
What
A vulnerability in UDP processing could allow an unauthenticated remote attacker to cause a denial of service.
Who is affected
Users of Cisco IOS and IOS XE Software are affected.
Urgency
Remediation is urgent due to active exploitation and critical severity.
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-2017-6627

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-2017-6627coverage & 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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