CVE-2020-3273 : Security Advisory and Response
Learn about CVE-2020-3273, a high-severity vulnerability in Cisco Wireless LAN Controller (WLC) Software that could allow remote attackers to cause denial of service (DoS) attacks. Find out the impact, affected systems, exploitation details, and mitigation steps.
A vulnerability in the 802.11 Generic Advertisement Service (GAS) frame processing function of Cisco Wireless LAN Controller (WLC) Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS).
Understanding CVE-2020-3273
This CVE involves a vulnerability in Cisco Wireless LAN Controller (WLC) Software that could lead to a denial of service attack.
What is CVE-2020-3273?
The vulnerability in the 802.11 GAS frame processing function of Cisco WLC Software allows attackers to trigger device reloads, causing a DoS.
The Impact of CVE-2020-3273
- CVSS Base Score: 8.6 (High Severity)
- Attack Vector: Network
- Availability Impact: High
- The vulnerability could be exploited remotely by unauthenticated attackers, potentially leading to service disruption.
Technical Details of CVE-2020-3273
This section provides more technical insights into the vulnerability.
Vulnerability Description
- Incomplete input validation of 802.11 GAS frames in Cisco WLC Software
- Attackers can exploit this by sending crafted frames over the air or via CAPWAP packets
Affected Systems and Versions
- Affected Product: Cisco Wireless LAN Controller (WLC)
- Affected Version: Not applicable (n/a)
Exploitation Mechanism
- Attackers can send malicious 802.11 GAS frames to trigger device reloads
- Exploitation can occur over the air or with Layer 3 connectivity to the WLC
Mitigation and Prevention
Protecting systems from CVE-2020-3273 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Apply vendor-provided patches or updates promptly
- Monitor network traffic for any signs of exploitation
- Implement network segmentation to limit the impact of potential attacks
Long-Term Security Practices
- Regularly update and patch all software and firmware
- Conduct security assessments and penetration testing to identify vulnerabilities
- Educate users and IT staff on security best practices
Patching and Updates
- Cisco has likely released patches or updates to address this vulnerability
- Regularly check for security advisories and apply recommended patches