CVE-2015-3441 in DRGOS
Summary
by MITRE
The Parental Control panel in Genexis devices with DRGOS before 1.14.1 allows remote authenticated users to execute arbitrary CLI commands via the (1) start_hour, (2) start_minute, (3) end_hour, (4) end_minute, or (5) hostname parameter.
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Analysis
by VulDB Data Team • 07/14/2020
The vulnerability CVE-2015-3441 represents a critical command injection flaw within the Parental Control functionality of Genexis devices running DRGOS firmware versions prior to 1.14.1. This issue resides in the web-based administrative interface where users can configure parental control settings, making it accessible to authenticated attackers who can leverage this weakness to execute arbitrary command line interface commands on the affected device. The vulnerability specifically targets five parameters within the parental control configuration: start_hour, start_minute, end_hour, end_minute, and hostname, all of which are susceptible to malicious input manipulation.
This command injection vulnerability stems from inadequate input validation and sanitization within the device's web application layer, allowing attackers to inject malicious command sequences that are subsequently executed by the underlying operating system. The flaw enables remote authenticated users to bypass normal access controls and execute arbitrary code with the privileges of the web application process, potentially leading to complete system compromise. The vulnerability is classified as CWE-77 according to the Common Weakness Enumeration catalog, which specifically addresses command injection vulnerabilities where untrusted data is incorporated into command execution contexts without proper sanitization.
The operational impact of this vulnerability is severe as it provides attackers with persistent access to the device's command execution environment, enabling them to perform various malicious activities including but not limited to system reconnaissance, privilege escalation, data exfiltration, and installation of persistent backdoors. Attackers can manipulate the parental control settings to inject commands that execute with elevated privileges, potentially allowing them to modify system configurations, disable security features, or even replace firmware images. This vulnerability directly maps to several techniques within the MITRE ATT&CK framework, particularly those related to command and control, privilege escalation, and persistent threats through web application exploitation.
Mitigation strategies for CVE-2015-3441 should prioritize immediate firmware updates to DRGOS version 1.14.1 or later, which contains the necessary patches to address the command injection vulnerability. Network administrators should also implement strict access controls and authentication mechanisms to limit the number of users with administrative privileges, while monitoring network traffic for suspicious command execution patterns. Additional protective measures include implementing web application firewalls to filter malicious inputs, disabling unnecessary administrative interfaces, and conducting regular security audits of network devices. The vulnerability highlights the importance of proper input validation and output encoding practices in web applications, aligning with security best practices outlined in the OWASP Top Ten and other industry security standards that emphasize the need for robust sanitization of user inputs to prevent injection attacks. Organizations should also consider network segmentation and monitoring solutions to detect unauthorized command execution attempts and prevent lateral movement within their networks.