CVE-2019-1796 Explained : Impact and Mitigation
Discover the impact of CVE-2019-1796 on Cisco Wireless LAN Controller Software versions less than 8.2.170.0, 8.5.150.0, and 8.8.100.0. Learn how to mitigate the vulnerability and prevent potential DoS attacks.
A weakness has been discovered in how Cisco Wireless LAN Controller (WLC) Software handles Inter-Access Point Protocol (IAPP) messages, potentially leading to a denial of service (DoS) situation.
Understanding CVE-2019-1796
What is CVE-2019-1796?
The vulnerability in Cisco WLC Software allows an unauthorized attacker in close proximity to the device to exploit inadequate validation of input fields within IAPP messages, causing a DoS condition.
The Impact of CVE-2019-1796
The vulnerability could result in a DoS situation by causing the Cisco WLC Software to reload, affecting versions prior to 8.2.170.0, 8.5.150.0, and 8.8.100.0.
Technical Details of CVE-2019-1796
Vulnerability Description
- Improper validation of input fields within IAPP messages by Cisco WLC Software
Affected Systems and Versions
- Cisco Wireless LAN Controller (WLC) Software versions less than 8.2.170.0, 8.5.150.0, and 8.8.100.0
Exploitation Mechanism
- Attacker sends malicious IAPP messages to the device, causing a reload and DoS condition
Mitigation and Prevention
Immediate Steps to Take
- Update Cisco WLC Software to versions 8.2.170.0, 8.5.150.0, or 8.8.100.0
- Monitor network for any unusual activity
Long-Term Security Practices
- Regularly update software and firmware
- Implement network segmentation and access controls
Patching and Updates
- Apply patches provided by Cisco to address the vulnerability