vulnwire
8.6high

CVE-2018-0443

Cisco Wireless LAN Controller Software Control and Provisioning of Wireless Access Points Protocol Denial of Service Vulnerability

Published 8 y ago · modified 4 mo ago · JSON

CVSS
8.6
v3.0 · CNA
CISA KEV
No
not known exploited
EPSS
3.4%
percentile 89%
Public exploits
0
none known

A vulnerability in the Control and Provisioning of Wireless Access Points (CAPWAP) protocol component of Cisco Wireless LAN Controller (WLC) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. The vulnerability is due to improper input validation on fields within CAPWAP Discovery Request packets by the affected device. An attacker could exploit this vulnerability by sending malicious CAPWAP Discovery Request packets to the Cisco WLC Software. A successful exploit could allow the attacker to cause the Cisco WLC Software to disconnect associated access points (APs). While the APs disconnect and reconnect, service will be unavailable for a brief period of time, resulting in a DoS condition.

CISA SSVC assessment

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
23 mo ago

Exploit prediction (EPSS)

3.38% probability of exploitation in the next 30 days, higher than 89% of all scored CVEs.

CVSS scores

Assigned byVersionScoreVector
CNA3.08.6CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
NVD3.17.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA3.08.6CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
NVD2.05.0AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

  • Cisco Cisco Wireless LAN Controller (WLC)

Classification

Weakness
  • CWE-399 Resource Management Errors
  • CWE-20 Improper Input Validation

References

  • tools.cisco.com /security/center/content/CiscoSecurityAdvisory/cisco-sa-20181017-wlc-capwap-dos · vendor-advisory, x_refsource_CISCO, x_transferred
  • securitytracker.com /id/1041922 · vdb-entry, x_refsource_SECTRACK, x_transferred
  • securityfocus.com /bid/105686 · vdb-entry, x_refsource_BID, x_transferred

Sources

vulnwire keeps one entry per vulnerability: the CVE id wins, then GHSA; records that alias each other are merged. Machine-readable: JSON.