CVE-2018-20909 : Exploit Details and Defense Strategies
Learn about CVE-2018-20909, a vulnerability in cPanel versions prior to 70.0.23 allowing unauthorized file permission changes during backups. Find mitigation steps and long-term security practices.
In versions of cPanel prior to 70.0.23, there is a vulnerability that allows unauthorized modifications to file permissions during legacy incremental backups (SEC-338).
Understanding CVE-2018-20909
In cPanel before version 70.0.23, a security flaw exists that permits arbitrary file-chmod operations during legacy incremental backups.
What is CVE-2018-20909?
cPanel versions preceding 70.0.23 are susceptible to unauthorized changes in file permissions during legacy incremental backup processes.
The Impact of CVE-2018-20909
This vulnerability could be exploited by attackers to manipulate file permissions during backups, potentially leading to unauthorized access or data loss.
Technical Details of CVE-2018-20909
Vulnerability Description
The issue in cPanel allows for unauthorized modifications to file permissions during legacy incremental backups.
Affected Systems and Versions
- Product: cPanel
- Versions Affected: Prior to 70.0.23
Exploitation Mechanism
Attackers can exploit this vulnerability to alter file permissions during backup operations, potentially compromising the integrity of the system.
Mitigation and Prevention
Immediate Steps to Take
- Update cPanel to version 70.0.23 or later to mitigate this vulnerability.
- Regularly monitor file permissions and access logs for any unauthorized changes.
Long-Term Security Practices
- Implement regular security audits to identify and address vulnerabilities promptly.
- Educate users on secure backup practices and the importance of file permission management.
Patching and Updates
- Stay informed about security updates and patches released by cPanel.
- Apply patches promptly to ensure the system is protected from known vulnerabilities.