CVE-2020-3492 : Vulnerability Insights and Analysis
Learn about CVE-2020-3492, a high-severity vulnerability in Cisco IOS XE Software and Cisco AireOS Software that could lead to a denial of service (DoS) attack. Find out the impact, affected systems, exploitation mechanism, and mitigation steps.
A vulnerability in the Flexible NetFlow Version 9 packet processor of Cisco IOS XE Software for Cisco Catalyst 9800 Series Wireless Controllers and Cisco AireOS Software for Cisco Wireless LAN Controllers (WLC) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.
Understanding CVE-2020-3492
This CVE involves a vulnerability in Cisco IOS XE Software and Cisco AireOS Software that could lead to a DoS attack.
What is CVE-2020-3492?
The vulnerability arises from insufficient validation of certain parameters in a Flexible NetFlow Version 9 record, allowing attackers to trigger a DoS condition by sending a crafted packet to the device.
The Impact of CVE-2020-3492
- CVSS Base Score: 8.6 (High Severity)
- Attack Vector: Network
- Availability Impact: High
- Successful exploitation could lead to a process crash and device reload.
Technical Details of CVE-2020-3492
This section provides more in-depth technical insights into the vulnerability.
Vulnerability Description
The vulnerability stems from inadequate validation of specific parameters in a Flexible NetFlow Version 9 record.
Affected Systems and Versions
- Affected Product: Cisco Wireless LAN Controller (WLC)
- Vendor: Cisco
- Affected Version: Not applicable (n/a)
Exploitation Mechanism
Attackers can exploit this vulnerability by spoofing an Access Point's address and sending a crafted packet to the device.
Mitigation and Prevention
Protecting systems from CVE-2020-3492 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Apply vendor-provided patches or updates promptly.
- Monitor network traffic for any suspicious activities.
- Implement network segmentation to limit the impact of potential attacks.
Long-Term Security Practices
- Regularly update and patch all software and firmware.
- Conduct security training for employees to recognize and report potential security threats.
Patching and Updates
- Refer to the vendor's security advisory for specific patch details and instructions.