Vulnerability Description
A vulnerability in the Cisco Cluster Management Protocol (CMP) processing code in Cisco IOS and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a reload of an affected device or remotely execute code with elevated privileges. The Cluster Management Protocol utilizes Telnet internally as a signaling and command protocol between cluster members. The vulnerability is due to the combination of two factors: (1) the failure to restrict the use of CMP-specific Telnet options only to internal, local communications between cluster members and instead accept and process such options over any Telnet connection to an affected device; and (2) the incorrect processing of malformed CMP-specific Telnet options. An attacker could exploit this vulnerability by sending malformed CMP-specific Telnet options while establishing a Telnet session with an affected Cisco device configured to accept Telnet connections. An exploit could allow an attacker to execute arbitrary code and obtain full control of the device or cause a reload of the affected device. This affects Catalyst switches, Embedded Service 2020 switches, Enhanced Layer 2 EtherSwitch Service Module, Enhanced Layer 2/3 EtherSwitch Service Module, Gigabit Ethernet Switch Module (CGESM) for HP, IE Industrial Ethernet switches, ME 4924-10GE switch, RF Gateway 10, and SM-X Layer 2/3 EtherSwitch Service Module. Cisco Bug IDs: CSCvd48893.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Ios | >= 12.2s, <= 15.1\(3\)svs |
| Cisco | Ios Xe | >= 3.2sg, <= 3.9e |
| Cisco | Catalyst 2350-48Td-S | - |
| Cisco | Catalyst 2350-48Td-Sd | - |
| Cisco | Catalyst 2360-48Td-S | - |
| Cisco | Catalyst 2918-24Tc-C | - |
| Cisco | Catalyst 2918-24Tt-C | - |
| Cisco | Catalyst 2918-48Tc-C | - |
| Cisco | Catalyst 2918-48Tt-C | - |
| Cisco | Catalyst 2928-24Tc-C | - |
| Cisco | Catalyst 2960-24-S | - |
| Cisco | Catalyst 2960-24Lc-S | - |
| Cisco | Catalyst 2960-24Lt-L | - |
| Cisco | Catalyst 2960-24Pc-L | - |
| Cisco | Catalyst 2960-24Pc-S | - |
| Cisco | Catalyst 2960-24Tc-L | - |
| Cisco | Catalyst 2960-24Tc-S | - |
| Cisco | Catalyst 2960-24Tt-L | - |
| Cisco | Catalyst 2960-48Pst-L | - |
| Cisco | Catalyst 2960-48Pst-S | - |
Related Weaknesses (CWE)
References
- http://www.securityfocus.com/bid/96960Third Party AdvisoryVDB Entry
- http://www.securityfocus.com/bid/97391Third Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1038059Third Party AdvisoryVDB Entry
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-2Vendor Advisory
- https://www.exploit-db.com/exploits/41872/ExploitThird Party AdvisoryVDB Entry
- https://www.exploit-db.com/exploits/41874/Broken Link
- http://www.securityfocus.com/bid/96960Third Party AdvisoryVDB Entry
- http://www.securityfocus.com/bid/97391Third Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1038059Third Party AdvisoryVDB Entry
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-2Vendor Advisory
- https://www.exploit-db.com/exploits/41872/ExploitThird Party AdvisoryVDB Entry
- https://www.exploit-db.com/exploits/41874/Broken Link
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-US Government Resource
FAQ
What is CVE-2017-3881?
CVE-2017-3881 is a vulnerability with a CVSS score of 9.8 (CRITICAL). A vulnerability in the Cisco Cluster Management Protocol (CMP) processing code in Cisco IOS and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a reload of an affected d...
How severe is CVE-2017-3881?
CVE-2017-3881 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2017-3881?
Check the references section above for vendor advisories and patch information. Affected products include: Cisco Ios, Cisco Ios Xe, Cisco Catalyst 2350-48Td-S, Cisco Catalyst 2350-48Td-Sd, Cisco Catalyst 2360-48Td-S.