CVE-2020-4534 : Exploit Details and Defense Strategies
Learn about CVE-2020-4534 affecting IBM WebSphere Application Server versions 7.0, 8.0, 8.5, and 9.0. Find out the impact, exploitation mechanism, and mitigation steps.
IBM WebSphere Application Server versions 7.0, 8.0, 8.5, and 9.0 are vulnerable to an elevation of privilege attack due to improper handling of UNC paths.
Understanding CVE-2020-4534
IBM WebSphere Application Server versions 7.0, 8.0, 8.5, and 9.0 are susceptible to a local authenticated attacker gaining elevated privileges by exploiting UNC path handling.
What is CVE-2020-4534?
This CVE refers to a vulnerability in IBM WebSphere Application Server versions 7.0, 8.0, 8.5, and 9.0 that allows a local authenticated attacker to execute arbitrary code with higher privileges by manipulating UNC paths.
The Impact of CVE-2020-4534
- CVSS Base Score: 7.8 (High)
- Attack Vector: Local
- Confidentiality Impact: High
- Integrity Impact: High
- Availability Impact: High
- Privileges Required: Low
- Exploit Code Maturity: Unproven
- Remediation Level: Official Fix
- Report Confidence: Confirmed
- Scope: Changed
- User Interaction: None
Technical Details of CVE-2020-4534
IBM WebSphere Application Server versions 7.0, 8.0, 8.5, and 9.0 are affected by the following:
Vulnerability Description
The vulnerability allows a local authenticated attacker to gain elevated privileges by exploiting UNC path handling.
Affected Systems and Versions
- IBM WebSphere Application Server 7.0
- IBM WebSphere Application Server 8.0
- IBM WebSphere Application Server 8.5
- IBM WebSphere Application Server 9.0
Exploitation Mechanism
By scheduling a task with a specially-crafted UNC path, an attacker can execute arbitrary code with higher privileges.
Mitigation and Prevention
To address CVE-2020-4534, consider the following:
Immediate Steps to Take
- Apply the official fix provided by IBM.
- Monitor for any unusual activities on the affected systems.
- Restrict access to vulnerable systems.
Long-Term Security Practices
- Regularly update and patch the WebSphere Application Server.
- Conduct security training for system administrators to recognize and respond to potential threats.
Patching and Updates
Ensure that all systems running IBM WebSphere Application Server versions 7.0, 8.0, 8.5, and 9.0 are updated with the latest security patches.