CVE-2020-5889 : Exploit Details and Defense Strategies

A vulnerability in BIG-IP APM versions 14.1.0-14.1.2.3, 15.0.0-15.0.1.2, and 15.1.0-15.1.0.1 could allow for reflected XSS attacks.

Understanding CVE-2020-5889

This CVE involves a security issue in the BIG-IP APM portal access that could be exploited through a specially crafted HTTP request.

What is CVE-2020-5889?

CVE-2020-5889 is a vulnerability found in versions 14.1.0-14.1.2.3, 15.0.0-15.0.1.2, and 15.1.0-15.1.0.1 of BIG-IP APM. It enables attackers to execute reflected XSS attacks by manipulating HTTP responses.

The Impact of CVE-2020-5889

This vulnerability could lead to the execution of malicious scripts in the context of a user's session, potentially compromising sensitive data or performing unauthorized actions.

Technical Details of CVE-2020-5889

The technical aspects of this CVE are as follows:

Vulnerability Description

A specially crafted HTTP request in the BIG-IP APM portal access can result in reflected XSS after the system rewrites the HTTP response from an untrusted backend server.

Affected Systems and Versions

BIG-IP APM versions 14.1.0-14.1.2.3
BIG-IP APM versions 15.0.0-15.0.1.2
BIG-IP APM versions 15.1.0-15.1.0.1

Exploitation Mechanism

Attackers can exploit this vulnerability by sending a malicious HTTP request to the BIG-IP APM system, which then rewrites the response from an untrusted server, leading to the execution of malicious scripts.

Mitigation and Prevention

To address CVE-2020-5889, consider the following steps:

Immediate Steps to Take

Apply the necessary patches provided by the vendor.
Monitor network traffic for any suspicious activity.
Implement strict input validation to prevent malicious inputs.

Long-Term Security Practices

Regularly update and patch all software and systems.
Conduct security training for employees to raise awareness of XSS attacks.

Patching and Updates

Ensure that you regularly check for updates and patches from the vendor to mitigate the risk of exploitation.