Skip to content

CVE-2017-3881 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...

CriticalCVSS 9.8 EPSS 99.0% CISA KEV added 2022-03-25 · due 2022-04-15 Exploited in the wild Framework module Public exploit PoC
Published
Updated
Exploit status
Exploited in the wild (confirmed)
Sign in for asset impact Search another CVE

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.

CISA Known Exploited Vulnerability

Date added
2022-03-25
Due date (FCEB)
2022-04-15
Ransomware use
Unknown

Required action

Apply updates per vendor instructions.

Affected products

ProductAffected versionsFixed in
cisco ios >= 12.2s, <= 15.1\(3\)svs No fix listed
cisco ios xe >= 3.2sg, <= 3.9e No fix listed

References

  • 96960 third-party-advisory vdb-entry
  • 97391 third-party-advisory vdb-entry
  • 1038059 third-party-advisory vdb-entry
  • tools.cisco.com vendor-advisory
  • 41872 exploit third-party-advisory vdb-entry
  • 41874 broken-link exploit
  • www.cisa.gov government-resource us-government-resource