CVE-2020-3118 : Security Advisory and Response
Learn about CVE-2020-3118, a high-severity vulnerability in Cisco IOS XR Software allowing arbitrary code execution. Find mitigation steps and affected versions here.
A vulnerability in the Cisco Discovery Protocol implementation for Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to execute arbitrary code or cause a reload on an affected device.
Understanding CVE-2020-3118
This CVE involves a vulnerability in Cisco IOS XR Software that could lead to arbitrary code execution by an attacker.
What is CVE-2020-3118?
The vulnerability in Cisco Discovery Protocol implementation allows an adjacent attacker to execute arbitrary code or trigger a device reload.
The Impact of CVE-2020-3118
- CVSS Base Score: 8.8 (High Severity)
- Attack Vector: Adjacent Network
- Confidentiality Impact: High
- Integrity Impact: High
- Availability Impact: High
Technical Details of CVE-2020-3118
This section provides more technical insights into the vulnerability.
Vulnerability Description
The vulnerability arises from improper validation of string input from specific fields in Cisco Discovery Protocol messages.
Affected Systems and Versions
- Affected Product: Cisco IOS XR Software
- Vendor: Cisco
- Vulnerable Versions: Less than 6.6.3
Exploitation Mechanism
- Attackers can exploit this by sending a malicious Cisco Discovery Protocol packet to the affected device.
Mitigation and Prevention
Protect your systems from this vulnerability with the following steps:
Immediate Steps to Take
- Apply vendor patches promptly
- Implement network segmentation
- Monitor network traffic for any suspicious activity
Long-Term Security Practices
- Regularly update and patch software
- Conduct security training for staff
Patching and Updates
- Refer to the vendor's security advisory for patch details