Executive Risk Summary
"A vulnerability in the Cisco Cluster Management Protocol (CMP) processing code could allow an unauthenticated, remote attacker to cause a reload of an affected device or remotely execute code with elevated privileges. This affects various Cisco devices, including Catalyst switches and Embedded Service 2020 switches."
Anticipated Attack Path
- 1. Establish a Telnet session with an affected Cisco device
- 2. Send malformed CMP-specific Telnet options to the device
- 3. Execute arbitrary code or cause a reload of the device
Am I Vulnerable?
- Verify if Telnet connections are accepted by the device
- Check for the presence of CMP-specific Telnet options in the device configuration
- Validate the device's software version against known vulnerable versions
Operational Audit Arsenal
Target Type Network Device
Target Asset telnetd
Standard Path /usr/sbin/telnetd
Manual Verification Required
This is a non-Windows asset (Cisco). Use the target asset details and official path provided above to verify your current version against the official vendor advisories listed below.
Patch Impact Forecast
Reboot Required Likely
Potential network disruption during reboot
Internal Work Notes
CVE-2017-3881: Unauthenticated remote code execution vulnerability in Cisco IOS and Cisco IOS XE Software - Cluster Management Protocol (CMP)
Technical Intelligence & Operational Utilities • Delivered Weekly
Intelligence Sources
Official Advisoryhttp://www.securityfocus.com/bid/96960
Official Advisoryhttp://www.securityfocus.com/bid/97391
Official Advisoryhttp://www.securitytracker.com/id/1038059
Official Advisoryhttps://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170317-cmp
Official Advisoryhttps://www.exploit-db.com/exploits/41872/
Official Advisoryhttps://www.exploit-db.com/exploits/41874/
Official Advisoryhttp://www.securityfocus.com/bid/96960
Official Advisoryhttp://www.securityfocus.com/bid/97391
Official Advisoryhttp://www.securitytracker.com/id/1038059
Official Advisoryhttps://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170317-cmp
Official Advisoryhttps://www.exploit-db.com/exploits/41872/
Official Advisoryhttps://www.exploit-db.com/exploits/41874/
Official Advisoryhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-3881
Related Cisco Threats
Data compiled from NVD, MSRC, and CISA KEV Catalog. Intelligence synthesized via AI. Scripts provided for diagnostic purposes under MIT License.