CVE-2017-12232
Cisco IOS
Published 29 Sept 2017 · updated 17 Jun 2026 · Analyzed
Exploited in the wild
CISA added this to its Known Exploited Vulnerabilities catalog on 3 Mar 2022, with a remediation deadline of 24 Mar 2022 for US federal agencies.
Required action: Apply updates per vendor instructions.
Description
A vulnerability in the implementation of a protocol in Cisco Integrated Services Routers Generation 2 (ISR G2) Routers running Cisco IOS 15.0 through 15.6 could allow an unauthenticated, adjacent attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. The vulnerability is due to a misclassification of Ethernet frames. An attacker could exploit this vulnerability by sending a crafted Ethernet frame to an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition. Cisco Bug IDs: CSCvc03809.
References
- www.securityfocus.com/bid/101044 · Broken Link, Third Party Advisory, VDB Entry
- www.securitytracker.com/id/1039452 · Broken Link, Third Party Advisory, VDB Entry
- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170927-rbip-dos · Vendor Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-12232 · US Government Resource