AEGLIX vulnerability intelligence
CVE-2017-3881
CRITICAL · CVSS 9.8 · Analyzed
Published: 2017-03-17 · Updated: 2026-06-17 · Source: NVD
Vulnerability overview
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.
Severity and scoring
- CVSS score
- 9.8 · CRITICAL
- CVSS version
- 3.1
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-20
CVSS measures technical severity; it does not establish whether this vulnerability is being exploited in your environment.
Known exploitation and remediation
Listed in CISA’s Known Exploited Vulnerabilities catalog.
- Affected product
- Cisco · IOS and IOS XE
- Added to catalog
- 2022-03-25
- Required action
- Apply updates per vendor instructions.
- CISA remediation due date
- 2022-04-15
CISA deadlines apply to the organizations covered by its directives. Confirm your own remediation requirements.
Verify affected versions and patch availability in the vendor advisory before making changes.
Affected products and versions
cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*
From (inclusive): 12.2s
Through (inclusive): 15.1\(3\)svs
cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*
From (inclusive): 3.2sg
Through (inclusive): 3.9e
These are NVD CPE applicability entries. Some products depend on configuration conditions; consult the official record to confirm applicability.
Advisories and references
- http://www.securityfocus.com/bid/96960
Third Party Advisory · VDB Entry
- http://www.securityfocus.com/bid/97391
Third Party Advisory · VDB Entry
- http://www.securitytracker.com/id/1038059
Third Party Advisory · VDB Entry
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170317-cmp
Vendor Advisory
- https://www.exploit-db.com/exploits/41872/
Exploit · Third Party Advisory · VDB Entry
- https://www.exploit-db.com/exploits/41874/
Broken Link
- http://www.securityfocus.com/bid/96960
Third Party Advisory · VDB Entry
- http://www.securityfocus.com/bid/97391
Third Party Advisory · VDB Entry
- http://www.securitytracker.com/id/1038059
Third Party Advisory · VDB Entry
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170317-cmp
Vendor Advisory
- https://www.exploit-db.com/exploits/41872/
Exploit · Third Party Advisory · VDB Entry
- https://www.exploit-db.com/exploits/41874/
Broken Link
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-3881
US Government Resource