CVE-2021-42897 in wms
Summary
by MITRE • 05/16/2022
A remote command execution (RCE) vulnerability was found in FeMiner wms V1.0 in /wms/src/system/datarec.php. The $_POST[r_name] is directly passed into the $mysqlstr and is executed by exec.
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Analysis
by VulDB Data Team • 05/18/2022
The vulnerability identified as CVE-2021-42897 represents a critical remote command execution flaw in the FeMiner wms V1.0 web application. This security weakness resides within the /wms/src/system/datarec.php file where user input is improperly handled, creating an avenue for attackers to execute arbitrary commands on the affected system. The vulnerability stems from the direct incorporation of user-supplied data into system commands without adequate sanitization or validation measures. The specific parameter $_POST[r_name] is directly concatenated into the $mysqlstr variable before being executed through the exec function, which constitutes a classic command injection vulnerability pattern. This flaw allows remote attackers to manipulate the application's behavior by injecting malicious commands through the web interface, potentially leading to complete system compromise and unauthorized access to sensitive data.
The technical exploitation of this vulnerability follows a well-established pattern that aligns with CWE-77 and CWE-94 categories, representing command injection and code injection respectively. The ATT&CK framework categorizes this issue under T1059.001 - Command and Scripting Interpreter: PowerShell and T1059.003 - Command and Scripting Interpreter: Windows Command Shell, as attackers can leverage the system's command execution capabilities to run malicious payloads. The flaw manifests when an attacker submits a crafted payload through the r_name parameter in a POST request, which gets directly incorporated into the system command execution flow. This creates an environment where malicious commands can be executed with the privileges of the web application, potentially allowing attackers to escalate their access and perform further reconnaissance or attack activities.
The operational impact of CVE-2021-42897 extends beyond simple data theft, encompassing full system compromise and potential lateral movement within network environments. An attacker who successfully exploits this vulnerability can execute arbitrary commands on the target system, potentially gaining access to sensitive information, modifying or deleting data, installing malware, or using the compromised system as a pivot point for attacking other network resources. The vulnerability affects the web application's integrity and availability, as unauthorized command execution can disrupt normal operations and potentially cause system instability. Organizations running FeMiner wms V1.0 are particularly vulnerable since this flaw allows for remote exploitation without requiring authentication, making it an attractive target for automated attacks. The impact is exacerbated by the fact that the vulnerability affects a core system component, potentially compromising the entire web application infrastructure and associated data repositories.
Mitigation strategies for CVE-2021-42897 must address both immediate remediation and long-term security hardening measures. The primary recommendation involves implementing proper input validation and sanitization of all user-supplied data, specifically ensuring that the $_POST[r_name] parameter undergoes rigorous validation before being processed. Organizations should implement parameterized queries or prepared statements to prevent command injection attacks, as direct string concatenation into system commands creates inherent security risks. The system should employ proper access controls and privilege separation to limit the impact of successful exploitation, ensuring that the web application runs with minimal required privileges. Additionally, implementing web application firewalls and intrusion detection systems can help detect and block malicious payloads attempting to exploit this vulnerability. Regular security updates and patches should be applied to the FeMiner wms software, and organizations should conduct comprehensive security assessments to identify similar vulnerabilities in other components of their web infrastructure. Network segmentation and monitoring should be enhanced to detect unauthorized command execution attempts and prevent lateral movement within compromised environments.