CVE-2023-3767 in Webserver
Summary
by MITRE • 09/27/2023
An OS command injection vulnerability has been found on EasyPHP Webserver affecting version 14.1. This vulnerability could allow an attacker to get full access to the system by sending a specially crafted exploit to the /index.php?zone=settings parameter.
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Analysis
by VulDB Data Team • 09/27/2023
The vulnerability identified as CVE-2023-3767 represents a critical operating system command injection flaw within the EasyPHP Webserver version 14.1. This security weakness resides in the web application's handling of user input through the /index.php?zone=settings parameter, creating a pathway for malicious actors to execute arbitrary commands on the underlying operating system. The vulnerability stems from insufficient input validation and sanitization mechanisms that fail to properly filter or escape user-supplied data before incorporating it into system commands. Attackers can exploit this flaw by crafting malicious payloads that manipulate the application's behavior to execute unintended shell commands, potentially leading to complete system compromise.
The technical nature of this vulnerability aligns with CWE-77, which specifically addresses command injection flaws where untrusted data is incorporated into operating system commands without proper validation or sanitization. The attack vector leverages the web server's configuration and processing logic to bypass normal security controls, allowing remote code execution capabilities. When an attacker submits malicious input through the designated parameter, the application processes this data without adequate security measures, enabling the injection of system commands that can manipulate the server's operating environment. This flaw essentially provides attackers with a direct conduit to execute arbitrary code with the privileges of the web server process, which typically operates with elevated permissions on the host system.
The operational impact of CVE-2023-3767 extends far beyond simple data theft or service disruption. Successful exploitation can result in complete system compromise, allowing attackers to establish persistent backdoors, exfiltrate sensitive data, install malware, or use the compromised system as a launchpad for further attacks within the network. The vulnerability affects the core functionality of the EasyPHP web server, potentially exposing all websites hosted on the system to unauthorized access and manipulation. Organizations using this vulnerable version face significant risk of unauthorized system access, data breaches, and potential regulatory compliance violations due to the severity of the compromise.
Mitigation strategies for this vulnerability should prioritize immediate remediation through official vendor updates or patches addressing the command injection flaw. System administrators should implement network segmentation and access controls to limit exposure, while also deploying web application firewalls to detect and block malicious payloads targeting this specific parameter. The remediation process must include thorough input validation and output encoding mechanisms to prevent command injection attacks, following secure coding practices that align with industry standards such as those outlined in the OWASP Top Ten. Additionally, organizations should conduct comprehensive security assessments of their web applications and implement proper monitoring solutions to detect potential exploitation attempts. The ATT&CK framework categorizes this vulnerability under T1059.001 for command and scripting interpreter, highlighting the need for defensive measures that specifically target command execution capabilities and prevent unauthorized system access through web interfaces.