CVE-2021-23014 : Exploit Details and Defense Strategies
Learn about CVE-2021-23014 impacting BIG-IP ASM/Advanced WAF versions. Find out the implications of the missing authorization checks for file uploads and how to mitigate the risk.
This CVE-2021-23014 affects BIG-IP ASM/Advanced WAF versions 16.0.x before 16.0.1.1, 15.1.x before 15.1.3, and 14.1.x before 14.1.4, where authorization checks for file uploads are missing in a specific directory within the REST API.
Understanding CVE-2021-23014
This vulnerability exposes a security gap that could allow authenticated users with guest privileges to upload files without proper authorization checks.
What is CVE-2021-23014?
CVE-2021-23014 arises from a lack of authorization controls for file uploads in specific directories within the REST API of BIG-IP ASM/Advanced WAF versions.
The Impact of CVE-2021-23014
The missing authorization checks may lead to unauthorized file uploads by authenticated users with guest privileges, potentially compromising data integrity.
Technical Details of CVE-2021-23014
This section covers the specific details related to the vulnerability.
Vulnerability Description
BIG-IP ASM/Advanced WAF versions are vulnerable due to lacking proper authorization checks for file uploads within the REST API.
Affected Systems and Versions
Versions 16.0.x before 16.0.1.1, 15.1.x before 15.1.3, and 14.1.x before 14.1.4 of BIG-IP ASM/Advanced WAF are impacted by this vulnerability.
Exploitation Mechanism
Authenticated users with guest privileges can exploit this vulnerability by uploading files to a specific directory within the REST API without the necessary authorization.
Mitigation and Prevention
Protecting the system against CVE-2021-23014 involves taking immediate steps and implementing long-term security practices.
Immediate Steps to Take
Ensure that proper authorization checks are in place for file uploads in the affected directories. Monitor for any unauthorized file uploads.
Long-Term Security Practices
Regularly update and patch the affected systems to prevent exploitation of this vulnerability. Train users on secure file upload practices.
Patching and Updates
Apply the latest software updates provided by the vendor to address the vulnerability and enhance system security.