CVE-2021-42853 : Security Advisory and Response
Learn about CVE-2021-42853, a critical directory traversal vulnerability in SteelCentral AppInternals Dynamic Sampling Agent with high impact, affecting versions 10.x, < 12.13.0, and < 11.8.8. Find mitigation steps and prevention measures here.
A directory traversal vulnerability in SteelCentral AppInternals Dynamic Sampling Agent poses a critical threat due to lack of input validation.
Understanding CVE-2021-42853
What is CVE-2021-42853?
The vulnerability allows malicious payloads injection through the AgentDiagnosticServlet, exposing systems to unauthorized access and data breaches.
The Impact of CVE-2021-42853
The vulnerability has a Critical severity rating with a CVSS base score of 9.1, posing a high risk of confidential data exposure.
Technical Details of CVE-2021-42853
Vulnerability Description
- Directory traversal vulnerability in the AgentDiagnosticServlet
- Lack of user input validation at "/api/appInternals/1.0/agent/diagnostic/logs"
Affected Systems and Versions
- SteelCentral AppInternals Dynamic Sampling Agent versions 10.x, < 12.13.0, and < 11.8.8
Exploitation Mechanism
- Malicious payloads injection due to missing input validation
Mitigation and Prevention
Immediate Steps to Take
- Apply security patches for affected versions
- Implement network-level security controls
- Monitor and restrict API access
Long-Term Security Practices
- Conduct regular security audits and code reviews
- Educate users on secure coding practices
- Implement strong access control policies
Patching and Updates
- Update affected versions to the latest security-patched releases