Home/CVE/Cisco IOS Software for Cisco Integrated Services Routers Denial-of-Service Vulnerability
CVE

CVE-2017-12232

Cisco IOS Software for Cisco Integrated Services Routers Denial-of-Service Vulnerability

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.

MEDIUM · CVSS 6.5 ⚠ CISA KEV EPSS 0.01372
Act now
  • Listed on CISA KEV (known exploited in the wild)
  • SSVC exploitation status: active
Sigma rules0 YARA rules0
⬢

Required Remediation

Apply updates per vendor instructions.

▤

Affected Products & Versions

1
cisco ios>= 15.0 and <= 15.6
▣

Scoring & Timeline

6.5
MEDIUM · CVSS v3.1 · psirt@cisco.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD29 Sep 2017 · 01:34 AM
CVSS VectorCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC triage · cisa-vulnrichment
Exploitation
active
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

2
cisaKEV-CVE-2017-12232
cisco-csafcisco-sa-20170927-rbip-dos
🔗

References & Sources

4
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://www.securityfocus.com/bid/101044Broken LinkThird Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1039452Broken LinkThird Party AdvisoryVDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170927-rbip-dosVendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-12232US Government Resource
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