CVE-2013-10052 in ZPanel
Summary
by MITRE • 08/04/2025
ZPanel includes a helper binary named zsudo, intended to allow restricted privilege escalation for administrative tasks. However, when misconfigured in /etc/sudoers, zsudo can be invoked by low-privileged users to execute arbitrary commands as root. This flaw enables local attackers with shell access to escalate privileges by writing a payload to a writable directory and executing it via zsudo. The vulnerability is particularly impactful in post-exploitation scenarios following web server compromise, where the attacker inherits access to zsudo.
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Analysis
by VulDB Data Team • 08/06/2025
The vulnerability identified as CVE-2013-10052 resides within the ZPanel web hosting control panel system, specifically targeting a helper binary named zsudo that was designed to facilitate controlled privilege escalation for administrative operations. This binary represents a critical security flaw in the system's privilege management architecture, as it was intended to provide restricted access to root-level commands while maintaining security boundaries. The design premise of zsudo was to allow authorized users to perform specific administrative tasks without requiring full root access, but the implementation contained a fundamental configuration error that undermined this security model.
The technical flaw manifests in the improper configuration of the sudoers file, which governs which users can execute which commands with elevated privileges. When zsudo is incorrectly configured in /etc/sudoers, it creates a path traversal vulnerability that allows any user with shell access to invoke the binary with root privileges. This misconfiguration enables attackers to bypass normal access controls and execute arbitrary commands as the root user, effectively granting them complete system control. The vulnerability is particularly insidious because it leverages existing system permissions and does not require additional attack vectors to exploit.
The operational impact of this vulnerability extends far beyond simple privilege escalation, as it provides attackers with a persistent foothold within compromised systems. In post-exploitation scenarios following web server compromise, attackers who gain shell access can utilize zsudo to elevate their privileges and maintain long-term control over affected systems. This capability transforms a simple web application compromise into a full system takeover, allowing attackers to modify system files, install backdoors, or establish persistent access mechanisms. The vulnerability essentially creates a backdoor that bypasses normal authentication and authorization mechanisms, making it particularly dangerous in environments where the web server is already compromised.
Security professionals should note that this vulnerability aligns with CWE-276, which addresses improper privilege management, and maps to ATT&CK techniques such as privilege escalation and persistence. The flaw demonstrates a classic example of insecure configuration management, where default settings or poorly implemented security controls create exploitable conditions. Organizations should implement immediate remediation measures including proper configuration of the sudoers file, removal of unnecessary privileged binaries, and comprehensive security audits of all system components. Additionally, regular monitoring for unauthorized changes to system files and privilege configurations should be implemented to detect potential exploitation attempts. The vulnerability underscores the critical importance of proper privilege management and configuration security in maintaining system integrity and preventing unauthorized access to critical system resources.