THREATPORT/VULNERABILITY/CVE-2018-0443
HIGH SEVERITY

CVE-2018-0443

Wireless Lan Controller Software vulnerability

CVSS
7.5
EPSS
3.4%
EPSS pct
88th
Exploited
No 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.
Affected vendor
Cisco
Affected product
Wireless Lan Controller Software
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness type (CWE)
Published
2018-10-17

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to availability.

Its EPSS score of 3.4% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 88% of all scored CVEs.

Check your external exposure to CVE-2018-0443

  • Confirm whether Cisco Wireless Lan Controller Software is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2018-0443.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2018-0443

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2018-0443 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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