CVE-2020-3526 Explained : Impact and Mitigation
Learn about CVE-2020-3526, a high-severity vulnerability in Cisco IOS XE Software COPS engine that allows remote attackers to crash devices. Find mitigation steps and immediate actions to secure your systems.
A vulnerability in the Common Open Policy Service (COPS) engine of Cisco IOS XE Software on Cisco cBR-8 Converged Broadband Routers could allow an unauthenticated, remote attacker to crash a device due to insufficient input validation.
Understanding CVE-2020-3526
This CVE involves a denial of service vulnerability in Cisco IOS XE Software.
What is CVE-2020-3526?
The vulnerability in the Common Open Policy Service (COPS) engine of Cisco IOS XE Software on Cisco cBR-8 Converged Broadband Routers allows a remote attacker to crash a device by sending a malformed COPS message.
The Impact of CVE-2020-3526
- CVSS Base Score: 8.6 (High Severity)
- Attack Vector: Network
- Availability Impact: High
- The vulnerability does not require privileges for exploitation.
Technical Details of CVE-2020-3526
This section provides more technical insights into the vulnerability.
Vulnerability Description
The vulnerability is caused by insufficient input validation in the COPS engine, enabling attackers to crash the device by sending a specially crafted message.
Affected Systems and Versions
- Affected Product: Cisco IOS XE Software
- Affected Version: Not applicable (n/a)
Exploitation Mechanism
Attackers can exploit this vulnerability by sending a malformed COPS message to the targeted device, leading to a crash.
Mitigation and Prevention
Protecting systems from CVE-2020-3526 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 training for employees to recognize and report suspicious activities.
- Employ intrusion detection and prevention systems to enhance network security.
- Stay informed about the latest security threats and vulnerabilities.
- Consider implementing additional security measures such as access controls and encryption.
Patching and Updates
- Cisco has likely released patches or updates to address this vulnerability. Ensure timely installation of these fixes to mitigate the risk of exploitation.