CVE-2022-30425 in HG6
Summary
by MITRE • 06/02/2022
Tenda Technology Co.,Ltd HG6 3.3.0-210926 was discovered to contain a command injection vulnerability via the pingAddr and traceAddr parameters. This vulnerability is exploited via a crafted POST request.
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Analysis
by VulDB Data Team • 06/05/2022
The vulnerability identified as CVE-2022-30425 represents a critical command injection flaw within the Tenda Technology Co.,Ltd HG6 router firmware version 3.3.0-210926. This issue resides in the web interface's handling of network diagnostic parameters, specifically affecting the pingAddr and traceAddr fields that are commonly used for network troubleshooting and diagnostics. The vulnerability stems from inadequate input validation and sanitization within the router's web application, allowing attackers to inject malicious commands that are subsequently executed with the privileges of the web server process. The flaw is particularly concerning because it enables remote code execution through a simple crafted POST request, making it accessible to attackers without requiring physical access or authentication credentials.
The technical exploitation of this vulnerability occurs through the manipulation of the pingAddr and traceAddr parameters within the router's web interface. When these parameters are submitted via a POST request, the firmware fails to properly sanitize user input before incorporating it into system commands. This lack of proper input validation creates a direct path for attackers to inject operating system commands that will be executed by the underlying system shell. The vulnerability falls under CWE-77 which specifically addresses command injection flaws, where untrusted data is incorporated into shell commands without proper sanitization. Attackers can leverage this weakness to execute arbitrary commands on the affected device, potentially gaining full control over the router's functionality and accessing the internal network.
The operational impact of this vulnerability extends beyond simple remote code execution to encompass significant security implications for network infrastructure. An attacker who successfully exploits this vulnerability can gain unauthorized access to the router's administrative functions, potentially leading to complete network compromise. The vulnerability affects the router's ability to maintain network security boundaries, as it allows attackers to bypass the device's intended security controls. This could enable man-in-the-middle attacks, DNS hijacking, or the installation of persistent backdoors within the network infrastructure. The attack surface is further expanded because the vulnerability is accessible via the standard web interface, meaning that an attacker only needs to know the router's IP address and have network access to attempt exploitation, aligning with ATT&CK technique T1059.001 for command and scripting interpreter.
Mitigation strategies for CVE-2022-30425 should prioritize immediate firmware updates from Tenda Technology Co.,Ltd as the most effective solution to address the root cause of the vulnerability. Organizations should implement network segmentation to limit access to administrative interfaces and ensure that only authorized personnel can reach the router's management functions. Network monitoring should be enhanced to detect anomalous traffic patterns that might indicate exploitation attempts, particularly unusual POST requests targeting the affected parameters. Security teams should also consider implementing web application firewalls to filter malicious requests before they reach the vulnerable application. Additionally, regular security assessments of network infrastructure should be conducted to identify similar vulnerabilities in other network devices that may be susceptible to command injection attacks. The vulnerability demonstrates the critical importance of proper input validation and output encoding in web applications, as outlined in OWASP Top 10 2021 category A03:2021 - Injection flaws, which emphasizes the need for comprehensive sanitization of all user-provided data before processing.