CVE-2017-16608 in Enterprise Manager
Summary
by MITRE
This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Netgain Enterprise Manager. Authentication is not required to exploit this vulnerability. The specific flaw exists within exec.jsp. The issue results from the lack of proper validation of a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to execute code under the context of the current user. Was ZDI-CAN-4749.
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Analysis
by VulDB Data Team • 12/26/2019
This vulnerability represents a critical remote code execution flaw in Netgain Enterprise Manager that fundamentally undermines the security posture of affected systems. The vulnerability exists within the exec.jsp component and demonstrates a classic insecure input handling pattern that has been documented in numerous security advisories. The absence of authentication requirements makes this particularly dangerous as it allows any remote attacker to exploit the flaw without prior credentials or access privileges. This characteristic aligns with common attack patterns identified in the MITRE ATT&CK framework under the execution tactic where adversaries leverage system vulnerabilities to run malicious code.
The technical root cause of this vulnerability stems from insufficient input validation mechanisms within the application's processing pipeline. When user-supplied data reaches the exec.jsp component, the application fails to properly sanitize or validate the input string before incorporating it into system call operations. This creates an environment where attacker-controlled data can directly influence the execution flow of the application's underlying system commands. The vulnerability manifests as a command injection flaw that operates at the operating system level, allowing arbitrary code execution with the privileges of the user context under which the Netgain Enterprise Manager service is running. This type of flaw maps directly to CWE-77 and CWE-88 within the Common Weakness Enumeration catalog, which specifically address command injection vulnerabilities.
The operational impact of this vulnerability extends beyond simple code execution capabilities to encompass complete system compromise potential. An attacker who successfully exploits this vulnerability can execute arbitrary commands on the target system, potentially leading to data exfiltration, system persistence mechanisms, or further network reconnaissance activities. The vulnerability's ability to operate without authentication means that it can be exploited through automated scanning tools, making it particularly attractive to threat actors seeking to expand their attack surface. From a security control perspective, this vulnerability demonstrates the critical importance of input validation and the principle of least privilege in application security design. The attack surface is significantly broadened as this vulnerability affects not just the application layer but potentially the entire operating system context in which the application operates.
Mitigation strategies for this vulnerability should focus on immediate remediation through vendor-provided patches and updates. Organizations should implement network segmentation and access controls to limit exposure of vulnerable systems to untrusted networks. The principle of defense in depth suggests implementing additional monitoring and detection capabilities to identify potential exploitation attempts. Security teams should conduct comprehensive vulnerability assessments to identify similar patterns in other applications within their environment, as this vulnerability type commonly occurs in legacy systems where proper input validation was not implemented. Network-based intrusion detection systems should be configured to monitor for suspicious command execution patterns and unusual network traffic originating from vulnerable systems. Additionally, implementing application whitelisting and runtime application self-protection mechanisms can provide additional layers of defense against similar command injection vulnerabilities. The vulnerability serves as a reminder of the critical importance of secure coding practices and the need for comprehensive security testing throughout the software development lifecycle to prevent such fundamental flaws from reaching production environments.