CVE-2022-33329 in R1510
Summary
by MITRE • 06/30/2022
Multiple command injection vulnerabilities exist in the web_server ajax endpoints functionalities of Robustel R1510 3.3.0. A specially-crafted network packets can lead to arbitrary command execution. An attacker can send a sequence of requests to trigger these vulnerabilities.The `/ajax/set_sys_time/` API is affected by a command injection vulnerability.
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Analysis
by VulDB Data Team • 07/17/2022
The vulnerability identified as CVE-2022-33329 represents a critical command injection flaw within the Robustel R1510 device firmware version 3.3.0, specifically affecting the web server's ajax endpoint functionalities. This device operates as a cellular router and industrial communication gateway, making it a potential target for attackers seeking to compromise industrial control systems and network infrastructure. The vulnerability resides in the `/ajax/set_sys_time/` API endpoint which processes time-related system configurations through web-based interfaces. The flaw stems from inadequate input validation and sanitization of user-supplied data within the web server's request handling mechanisms, allowing malicious actors to inject arbitrary commands that execute within the device's operating system context.
The technical exploitation of this vulnerability follows a command injection pattern that aligns with CWE-77 and CWE-88 classifications, where untrusted data is directly incorporated into system command execution without proper sanitization. Attackers can craft specially crafted network packets containing malicious command sequences that bypass normal input validation checks within the web server's ajax endpoints. When the device processes these requests through the `/ajax/set_sys_time/` API, the malformed input gets concatenated into system commands, resulting in arbitrary code execution with the privileges of the web server process. This vulnerability operates at the application layer and can be triggered through HTTP requests, making it particularly dangerous as it requires no physical access or specialized equipment beyond standard network reconnaissance tools.
The operational impact of this vulnerability extends beyond simple unauthorized access, as it provides attackers with complete control over the affected device's functionality and potentially exposes the broader network it connects to. An attacker with successful exploitation can modify system time settings, execute arbitrary system commands, access sensitive configuration data, and potentially establish persistent backdoors within the industrial network infrastructure. The implications are particularly severe in industrial environments where the Robustel R1510 devices may be deployed for critical communications, SCADA systems, or remote monitoring applications. This vulnerability can be leveraged to disrupt operations, exfiltrate sensitive data, or serve as a foothold for lateral movement within the network, aligning with ATT&CK techniques such as T1059.001 for command and scripting interpreter and T1566.001 for spearphishing through social engineering.
Mitigation strategies for CVE-2022-33329 should prioritize immediate firmware updates from Robustel, as the vendor has likely released patches addressing this specific vulnerability. Network segmentation and access control measures should be implemented to limit exposure of these devices to untrusted networks, while monitoring systems should be deployed to detect anomalous requests to the affected ajax endpoints. Additionally, implementing web application firewalls and input validation controls can help prevent exploitation attempts, though these measures should complement rather than replace the firmware updates. Organizations should also consider conducting comprehensive network assessments to identify all instances of affected devices and ensure proper network hygiene practices are maintained to prevent unauthorized access to industrial control systems.