CVE-2017-12238
Actively exploited. CVE-2017-12238 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-03-03) — exploitation has been observed in the wild, and US federal agencies are required to remediate it under BOD 22-01. Treat patching as urgent.
A vulnerability in the Virtual Private LAN Service (VPLS) code of Cisco IOS for Cisco Catalyst 6800 Series Switches could allow an unauthenticated, adjacent attacker to cause a denial of service.
CSIRTS triage
- What
- A vulnerability in the VPLS code could allow an unauthenticated attacker to cause a denial of service.
- Who is affected
- Cisco Catalyst 6800 Series Switches with VPLS enabled are affected.
- Urgency
- Immediate remediation is necessary as the vulnerability is actively exploited and rated critical.
- Action
- Update to the latest Cisco IOS version to mitigate this issue.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Exploitation confirmedAlready exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 79% of all EPSS-scored CVEs.
Advisory coverage (1)
- criticalexploitedCVE-2017-12238: Cisco Catalyst 6800 Series Switches VPLS Denial-of-Service Vulnerabilitycisa-kev · 2022-03-03
External references
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