CVE-2024-32317 in AC10
Summary
by MITRE • 04/17/2024
Tenda AC10 v4.0 V16.03.10.13 and V16.03.10.20 firmware has a stack overflow vulnerability via the adslPwd parameter in the formWanParameterSetting function.
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Analysis
by VulDB Data Team • 08/09/2024
The vulnerability identified as CVE-2024-32317 affects Tenda AC10 routers running firmware versions v4.0 V16.03.10.13 and V16.03.10.20. This represents a critical stack overflow vulnerability that resides within the web interface handling of the device's configuration parameters. The flaw manifests specifically through the adslPwd parameter within the formWanParameterSetting function, which processes user input for ADSL connection settings. This type of vulnerability falls under the category of buffer overflow conditions where insufficient bounds checking allows malicious input to overwrite adjacent memory locations on the stack.
The technical implementation of this vulnerability demonstrates poor input validation practices within the router's firmware code. When a user submits a form containing the adslPwd parameter through the web interface, the application fails to properly validate or limit the length of the input data before processing it. This lack of input sanitization creates an exploitable condition where an attacker can craft a specially formatted payload that exceeds the allocated buffer space, causing a stack overflow that can potentially lead to arbitrary code execution. The vulnerability is particularly concerning as it exists in the web management interface, making it accessible over the network without requiring physical access to the device.
From an operational perspective, this vulnerability presents significant risks to network security and device integrity. An attacker who successfully exploits this stack overflow could gain unauthorized access to the router's administrative functions, potentially allowing them to modify network configurations, disable security features, or establish persistent access points. The impact extends beyond individual device compromise as compromised routers can serve as entry points for broader network infiltration. This vulnerability directly aligns with attack patterns described in the MITRE ATT&CK framework under the T1059.007 technique for command and scripting interpreter, as successful exploitation could enable remote command execution. Additionally, the vulnerability maps to CWE-121, which specifically addresses stack-based buffer overflow conditions, and CWE-79, which covers cross-site scripting vulnerabilities that may be leveraged in conjunction with this flaw.
The mitigation strategies for CVE-2024-32317 should prioritize immediate firmware updates from Tenda to address the root cause of the buffer overflow. Network administrators should also implement network segmentation to limit the exposure of these devices to untrusted networks, and consider disabling unnecessary web management interfaces when not actively required. Monitoring network traffic for suspicious patterns related to form submissions with unusually long parameters can help detect exploitation attempts. Security teams should also consider implementing web application firewalls to filter malicious input before it reaches the vulnerable application layer. Organizations should conduct thorough vulnerability assessments of their network infrastructure to identify other potentially affected Tenda devices and ensure all firmware versions are up to date with vendor security patches. The vulnerability demonstrates the critical importance of proper input validation and bounds checking in embedded systems, particularly those with web interfaces that are accessible over potentially untrusted networks.