CVE-2024-32307 in FH1205
Summary
by MITRE • 04/17/2024
Tenda FH1205 V2.0.0.7(775) firmware has a stack overflow vulnerability located in the PPW parameter in the fromWizardHandle function.
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Analysis
by VulDB Data Team • 08/09/2024
The Tenda FH1205 V2.0.0.7(775) wireless router firmware contains a critical stack overflow vulnerability that resides within the fromWizardHandle function. This vulnerability specifically targets the PPW parameter, which represents a password or passphrase input field commonly used in wireless network configuration processes. The stack overflow occurs when the firmware fails to properly validate or sanitize user-supplied input data, allowing an attacker to manipulate the program's execution flow by overflowing the allocated stack buffer. This type of vulnerability falls under the CWE-121 stack-based buffer overflow category, which represents one of the most common and dangerous classes of software vulnerabilities. The issue stems from improper input validation mechanisms that do not adequately check the length or content of the PPW parameter before processing it within the fromWizardHandle function.
The operational impact of this vulnerability extends beyond simple denial of service conditions, as it creates a potential pathway for remote code execution within the affected device. When an attacker successfully exploits this stack overflow, they can overwrite critical stack memory locations including return addresses and function pointers, potentially allowing them to inject and execute malicious code on the router. This presents a significant security risk to any network relying on the affected Tenda device, as the compromised router could serve as a foothold for broader network infiltration activities. The vulnerability is particularly concerning because it operates within the configuration wizard functionality, which is typically accessible to users during initial setup or configuration changes, making exploitation relatively straightforward. The attack surface is further expanded by the fact that this vulnerability can be triggered through network-based attacks without requiring physical access to the device.
Security professionals should recognize this vulnerability as a potential indicator of broader firmware quality issues within the Tenda product line, particularly concerning input validation and memory management practices. The presence of such a flaw in a network infrastructure device highlights the critical importance of proper software security testing and code review processes during firmware development cycles. Organizations should immediately assess their network infrastructure to identify any devices running the vulnerable Tenda FH1205 firmware version and implement mitigations such as network segmentation, access control restrictions, and network monitoring to detect potential exploitation attempts. The vulnerability also aligns with ATT&CK technique T1210 for exploitation of remote services and T1071.004 for application layer protocol usage, as it enables attackers to leverage network-based attacks against the device's configuration interface. Recommended mitigations include updating to firmware versions that address this specific stack overflow vulnerability, implementing network access controls to restrict access to administrative interfaces, and monitoring for unusual network traffic patterns that might indicate exploitation attempts.