CVE-2020-2039 : Exploit Details and Defense Strategies
Learn about CVE-2020-2039, a vulnerability in Palo Alto Networks PAN-OS allowing unauthenticated users to disrupt the management web interface. Find out the impacted systems, exploitation details, and mitigation steps.
An uncontrolled resource consumption vulnerability in Palo Alto Networks PAN-OS allows for a remote unauthenticated user to disrupt the availability of the management web interface through repeated file uploads.
Understanding CVE-2020-2039
What is CVE-2020-2039?
This CVE refers to a denial-of-service vulnerability in PAN-OS that enables an attacker to exhaust disk space by uploading temporary files through the management web interface.
The Impact of CVE-2020-2039
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: None
- Confidentiality Impact: None
- Integrity Impact: None
- Availability Impact: Low
- CVSS Base Score: 5.3 (Medium)
Technical Details of CVE-2020-2039
Vulnerability Description
The vulnerability allows unauthenticated users to disrupt the management web interface by uploading files that are not properly deleted, causing a denial-of-service condition.
Affected Systems and Versions
- PAN-OS 8.1 versions earlier than 8.1.16
- PAN-OS 9.0 versions earlier than 9.0.10
- PAN-OS 9.1 versions earlier than 9.1.4
- PAN-OS 10.0 versions earlier than 10.0.1
Exploitation Mechanism
No known malicious exploitation attempts have been reported by Palo Alto Networks.
Mitigation and Prevention
Immediate Steps to Take
- Upgrade to PAN-OS 8.1.16, 9.0.10, 9.1.4, 10.0.1, or later versions to mitigate the vulnerability.
- Follow best practices for securing the PAN-OS management web interface.
Long-Term Security Practices
- Regularly monitor and manage disk space usage on the PAN-OS system.
- Implement network security measures to detect and prevent unauthorized file uploads.
Patching and Updates
Ensure all PAN-OS systems are updated to versions 8.1.16, 9.0.10, 9.1.4, 10.0.1, or later to address the vulnerability.