CVE-2022-29592 in TX9 Pro
Summary
by MITRE • 05/05/2022
Tenda TX9 Pro 22.03.02.10 devices allow OS command injection via set_route (called by doSystemCmd_route).
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Analysis
by VulDB Data Team • 05/08/2022
The vulnerability CVE-2022-29592 represents a critical operating system command injection flaw discovered in Tenda TX9 Pro routers running firmware version 22.03.02.10. This vulnerability exists within the device's web interface handling mechanism, specifically in the set_route function which is invoked by the doSystemCmd_route endpoint. The flaw allows remote attackers to execute arbitrary operating system commands on the affected device by manipulating input parameters passed to the set_route function. The vulnerability stems from insufficient input validation and sanitization within the router's web management interface, creating a pathway for malicious command execution that could compromise the entire network infrastructure.
The technical implementation of this vulnerability demonstrates a classic command injection weakness where user-controllable input is directly concatenated into system commands without proper escaping or filtering mechanisms. The set_route function processes route configuration parameters that are passed through the doSystemCmd_route API endpoint, which lacks adequate sanitization of user-supplied data. This design flaw allows attackers to inject malicious commands that get executed with the privileges of the web server process, typically running with elevated system permissions. The vulnerability is particularly dangerous because it can be exploited remotely without requiring authentication, making it accessible to any attacker who can reach the device's web interface.
The operational impact of this vulnerability extends far beyond simple command execution, as it provides attackers with complete control over the affected router's operating system. Once exploited, adversaries can modify network routing tables, redirect traffic, establish backdoors, or even disable network services entirely. The compromised router becomes a potential pivot point for attacking internal network resources, as it can be used to monitor traffic, redirect connections, or serve as a launchpad for further attacks. The vulnerability also poses significant risks to network security posture, as the compromised device can be used to bypass firewall rules, create unauthorized network segments, or facilitate data exfiltration from the local network. Organizations relying on Tenda TX9 Pro devices for network infrastructure are particularly vulnerable since the attack surface includes not just the device itself but also all devices connected through it.
Mitigation strategies for CVE-2022-29592 should prioritize immediate firmware updates from Tenda to address the command injection vulnerability. Network administrators should implement network segmentation to limit the potential impact of exploitation, disable unnecessary web management interfaces, and monitor network traffic for signs of malicious activity. The vulnerability aligns with CWE-77 and CWE-88 categories, which specifically address command injection flaws in software systems. From an attack framework perspective, this vulnerability maps to multiple ATT&CK techniques including T1059.001 for command and script injection, T1021.001 for remote services, and T1566 for social engineering through network infrastructure compromise. Organizations should also consider implementing network monitoring solutions that can detect anomalous command execution patterns and establish incident response procedures specifically addressing router compromise scenarios. Regular security assessments of network infrastructure should include verification of firmware versions and patch status to prevent exploitation of similar vulnerabilities in other network devices.