CVE-2016-10768 in cPanel
Summary
by MITRE
cPanel before 60.0.25 allows file-overwrite operations during preparation for MySQL upgrades (SEC-161).
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Analysis
by VulDB Data Team • 07/20/2020
This vulnerability exists in cPanel versions prior to 60.0.25 and relates to insecure file handling during MySQL upgrade preparation processes. The flaw allows attackers to perform file overwrite operations that can lead to arbitrary code execution or privilege escalation within the system. The vulnerability specifically manifests during the upgrade preparation phase when cPanel creates temporary files or modifies existing configuration files without proper validation of file paths or permissions. This type of vulnerability falls under the category of insecure temporary file handling and can be classified as CWE-362, which deals with race conditions, and CWE-22, which covers path traversal issues. The attack vector typically involves an authenticated user who can manipulate file paths or create symbolic links to target critical system files during the upgrade process.
The operational impact of this vulnerability is significant as it can enable attackers to escalate privileges or execute malicious code on the affected system. When cPanel prepares for a MySQL upgrade, it often creates temporary files in predictable locations or modifies existing configuration files that may be accessible to less privileged users. The vulnerability allows an attacker to substitute these files with malicious content, potentially leading to complete system compromise. This issue represents a critical security flaw that can be exploited by both internal and external attackers who have access to the cPanel interface. The vulnerability is particularly dangerous because it occurs during routine system maintenance operations when administrators may be less vigilant about security monitoring.
Mitigation strategies for this vulnerability include immediately upgrading to cPanel version 60.0.25 or later where the issue has been resolved through proper file handling and validation mechanisms. Organizations should implement strict access controls and monitor file system changes during upgrade operations. Security best practices recommend that administrators validate file permissions and ownership before and after upgrade processes, particularly for temporary files and configuration directories. The fix implemented in the patched version addresses the root cause by ensuring that temporary files are created with proper permissions and that file overwrite operations are properly validated. Additionally, implementing network segmentation and privilege separation can reduce the impact of potential exploitation. This vulnerability demonstrates the importance of secure coding practices in system administration tools and the need for proper input validation and file handling procedures in software that manages critical system resources. The ATT&CK framework would categorize this vulnerability under privilege escalation and defense evasion techniques, as it enables attackers to gain higher system privileges and potentially avoid detection mechanisms.