CVE-2020-3516 Explained : Impact and Mitigation
Learn about CVE-2020-3516, a vulnerability in Cisco IOS XE Software that allows attackers to crash the web server. Find out the impact, affected systems, and mitigation steps.
A vulnerability in the web server authentication of Cisco IOS XE Software could allow an authenticated, remote attacker to crash the web server on the device.
Understanding CVE-2020-3516
This CVE involves a vulnerability in Cisco IOS XE Software that could be exploited by an authenticated attacker to crash the web server on the device.
What is CVE-2020-3516?
The vulnerability in the web server authentication of Cisco IOS XE Software allows an attacker to crash the web server by entering unexpected characters during a valid authentication process due to insufficient input validation.
The Impact of CVE-2020-3516
The vulnerability has a CVSS base score of 4.3, indicating a medium severity issue. If successfully exploited, it could lead to a denial of service by crashing the web server on the affected device.
Technical Details of CVE-2020-3516
This section provides more technical insights into the CVE.
Vulnerability Description
The vulnerability is caused by insufficient input validation during authentication in Cisco IOS XE Software, allowing an attacker to crash the web server by entering unexpected characters.
Affected Systems and Versions
- Product: Cisco IOS XE Software
- Vendor: Cisco
- Versions affected: Not applicable (n/a)
Exploitation Mechanism
- Attack Complexity: Low
- Attack Vector: Network
- Privileges Required: Low
- User Interaction: None
- Scope: Unchanged
- Availability Impact: Low
- Confidentiality Impact: None
- Integrity Impact: None
- Vector String: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Mitigation and Prevention
Protecting systems from CVE-2020-3516 is crucial to prevent potential attacks.
Immediate Steps to Take
- Apply vendor-provided patches or updates promptly.
- Monitor vendor sources for security advisories and follow recommended actions.
Long-Term Security Practices
- Regularly update and patch software to address known vulnerabilities.
- Implement strong authentication mechanisms and access controls.
Patching and Updates
- Regularly check for updates and patches from Cisco for Cisco IOS XE Software.