CVE-2021-40097 : Vulnerability Insights and Analysis
Discover the details of CVE-2021-40097 affecting Concrete CMS versions up to 8.5.5, allowing authenticated users to execute remote code via path traversal.
Concrete CMS through 8.5.5 is affected by a path traversal vulnerability that allows authenticated users to execute remote code by uploading PHP files.
Understanding CVE-2021-40097
Concrete CMS versions up to 8.5.5 are prone to a security flaw enabling remote code execution through path traversal.
What is CVE-2021-40097?
The vulnerability in Concrete CMS up to version 8.5.5 allows authenticated users to exploit a path traversal issue, leading to remote code execution by manipulating the 'bFilename' parameter.
The Impact of CVE-2021-40097
This vulnerability can be exploited by authenticated users to upload malicious PHP files and execute arbitrary remote code on the affected server.
Technical Details of CVE-2021-40097
Concrete CMS through 8.5.5 is affected by a severe security issue that facilitates remote code execution.
Vulnerability Description
The flaw enables authenticated users to conduct path traversal attacks, resulting in the execution of uploaded PHP code due to improper input validation of the 'bFilename' parameter.
Affected Systems and Versions
- Product: Concrete CMS
- Versions: Up to 8.5.5
Exploitation Mechanism
The vulnerability can be exploited by authenticated users uploading specially crafted PHP files containing malicious code, leveraging the path traversal flaw.
Mitigation and Prevention
Taking immediate action and following best security practices are crucial to mitigate the risk associated with CVE-2021-40097.
Immediate Steps to Take
- Update Concrete CMS to the latest patched version.
- Restrict access to upload functionalities to trusted users only.
- Monitor for any suspicious file uploads.
Long-Term Security Practices
- Conduct regular security audits and vulnerability assessments.
- Educate users on secure coding practices and awareness of potential threats.
- Implement a robust access control mechanism to prevent unauthorized file uploads.
Patching and Updates
Concrete CMS users should promptly apply security patches provided by the vendor to address the vulnerability and enhance the platform's security posture.