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CVE-2017-6663: Cisco IOS Software and Cisco IOS XE Software Denial-of-Service Vulnerability

criticalknown exploitedCVE-2017-6663
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 Autonomic Networking feature of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to cause autonomic nodes of an affected system to reload, resulting in denial-of-service (DoS).

CSIRTS triage

vendor: Ciscoproduct: IOS Software and IOS XE SoftwareDenial of service
What
A vulnerability in the Autonomic Networking feature allows adjacent attackers to cause a denial of service.
Who is affected
Adjacent unauthenticated attackers can exploit this vulnerability in Cisco IOS and IOS XE Software.
Urgency
Remediation is critical due to the high severity and active exploitation.
Action
Update Cisco IOS and IOS XE Software to the latest version.

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-2017-6663

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-2017-6663coverage & 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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