CVE-2017-7977 in eLux
Summary
by MITRE
The Screensavercc component in eLux RP before 5.5.0 allows attackers to bypass intended configuration restrictions and execute arbitrary commands with root privileges by inserting commands in a local configuration dialog in the control panel.
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Analysis
by VulDB Data Team • 10/29/2019
The vulnerability identified as CVE-2017-7977 affects the Screensavercc component within the eLux RP software suite prior to version 5.5.0. This represents a critical security flaw that undermines the intended access controls and privilege management mechanisms within the system. The vulnerability specifically targets the local configuration dialog interface in the control panel, where legitimate users might expect to interact with restricted system components through controlled interfaces. The flaw manifests when the application fails to properly validate or sanitize user input within this configuration dialog, creating an opportunity for malicious actors to inject arbitrary commands that execute with elevated privileges.
This vulnerability constitutes a privilege escalation issue that maps directly to CWE-78 and CWE-20, representing command injection and input validation flaws respectively. The security implications are severe as attackers can leverage this weakness to execute arbitrary code with root privileges, effectively compromising the entire system. The attack vector involves manipulation of the local configuration dialog where the application processes user inputs without adequate sanitization, allowing for command injection attacks that bypass normal access controls and security boundaries. The flaw exists in the control panel component where configuration settings are managed, making it a critical touchpoint for system administrators and users who interact with system configuration interfaces.
From an operational perspective, this vulnerability creates a significant risk for organizations deploying eLux RP software versions prior to 5.5.0, as it allows for complete system compromise through a relatively simple attack method. The command injection occurs within a trusted interface, making it difficult to detect and preventing traditional security controls from blocking the malicious activity. Attackers can leverage this to execute system commands, modify system files, install malware, or establish persistent access to the compromised system. The vulnerability aligns with ATT&CK technique T1059.001 for command and script interpreter, specifically targeting the execution of system commands through legitimate interfaces. The impact extends beyond immediate system compromise to include potential data exfiltration, lateral movement capabilities, and establishment of backdoors for continued access.
The mitigation strategy for this vulnerability requires immediate patching of the eLux RP software to version 5.5.0 or later, which includes proper input validation and sanitization measures within the Screensavercc component. Organizations should also implement additional security controls such as restricting access to the control panel interface, monitoring for unusual command execution patterns, and applying principle of least privilege configurations. Network segmentation and access control measures should be reinforced to limit potential lateral movement if the vulnerability is exploited. Security teams should also conduct comprehensive audits of system configurations and review access controls to ensure that unauthorized command execution cannot occur through alternative attack vectors. The vulnerability demonstrates the importance of proper input validation in GUI components and the need for robust privilege separation mechanisms in system configuration interfaces.