CVE-2021-42840 : What You Need to Know
Discover how the SuiteCRM before 7.11.19 vulnerability (CVE-2021-42840) can lead to remote code execution. Learn the impact, technical details, and mitigation steps to secure your system.
SuiteCRM before 7.11.19 allows remote code execution via the system settings Log File Name setting. Learn about the impact, technical details, and mitigation steps.
Understanding CVE-2021-42840
SuiteCRM before 7.11.19 allows remote code execution via the Log File Name setting, potentially leading to serious security issues.
What is CVE-2021-42840?
SuiteCRM before 7.11.19 is vulnerable to remote code execution due to incomplete handling of PHP file extensions, enabling attackers to execute arbitrary code.
The Impact of CVE-2021-42840
This vulnerability allows attackers to take over admin accounts and execute malicious PHP files under the web root, leading to a significant security risk.
Technical Details of CVE-2021-42840
SuiteCRM before version 7.11.19 is susceptible to remote code execution, posing a severe threat to system security.
Vulnerability Description
The issue arises from inadequate blocking of PHP file extensions, enabling attackers to refer to attacker-controlled PHP files.
Affected Systems and Versions
- Operating Systems: All systems running SuiteCRM before version 7.11.19
- SuiteCRM: Versions before 7.11.19
Exploitation Mechanism
- Attackers exploit the Log File Name setting to execute arbitrary PHP code under the web root.
Mitigation and Prevention
Take immediate action to secure your system against CVE-2021-42840 and prevent potential exploits.
Immediate Steps to Take
- Update SuiteCRM to version 7.11.19 or higher to address the vulnerability.
- Monitor system logs for any suspicious activity related to file execution.
- Restrict access to sensitive system settings to authorized personnel only.
Long-Term Security Practices
- Conduct regular security audits to identify and address similar vulnerabilities.
- Consider implementing a web application firewall (WAF) to filter and monitor incoming traffic.
Patching and Updates
- Stay informed about security updates and patches released by SuiteCRM.
- Promptly apply patches to eliminate known vulnerabilities and enhance system security.