CVE-2021-22993 : Security Advisory and Response
Learn about CVE-2021-22993 impacting BIG-IP Advanced WAF and BIG-IP ASM versions, leading to DOM-based XSS on the DoS Profile properties page. Take immediate steps to patch and secure your systems.
This CVE-2021-22993 affects BIG-IP Advanced WAF and BIG-IP ASM versions 16.0.x before 16.0.1.1, 15.1.x before 15.1.2, 14.1.x before 14.1.3.1, 13.1.x before 13.1.3.6, and 12.1.x before 12.1.5.3, leading to DOM-based XSS on the DoS Profile properties page.
Understanding CVE-2021-22993
This section delves into the details of the CVE-2021-22993 vulnerability in BIG-IP Advanced WAF and BIG-IP ASM.
What is CVE-2021-22993?
The vulnerability involves DOM-based XSS on the DoS Profile properties page in affected versions of BIG-IP Advanced WAF and BIG-IP ASM.
The Impact of CVE-2021-22993
Exploitation of this vulnerability could result in a cross-site scripting (XSS) attack, potentially allowing attackers to execute malicious scripts within the context of the affected site.
Technical Details of CVE-2021-22993
This section outlines the technical aspects of the CVE-2021-22993 vulnerability.
Vulnerability Description
The vulnerability exists in the handling of user input related to DoS Profile properties, leading to DOM-based XSS.
Affected Systems and Versions
BIG-IP Advanced WAF and BIG-IP ASM versions 16.0.x before 16.0.1.1, 15.1.x before 15.1.2, 14.1.x before 14.1.3.1, 13.1.x before 13.1.3.6, and 12.1.x before 12.1.5.3 are impacted.
Exploitation Mechanism
Attackers can exploit this vulnerability by injecting malicious scripts into the DoS Profile properties page, potentially leading to XSS attacks.
Mitigation and Prevention
This section provides guidance on mitigating and preventing exploitation of CVE-2021-22993.
Immediate Steps to Take
Users are advised to update to the patched versions (16.0.1.1, 15.1.2, 14.1.3.1, 13.1.3.6, or 12.1.5.3) to mitigate the vulnerability.
Long-Term Security Practices
Implement strict input validation mechanisms to prevent XSS attacks and regularly monitor for any unusual behavior.
Patching and Updates
F5 Networks has released patches for the affected versions to address the vulnerability and improve the security of BIG-IP Advanced WAF and BIG-IP ASM.