CVE-2022-45513 in W30E
Summary
by MITRE • 12/08/2022
Tenda W30E V1.0.1.25(633) was discovered to contain a stack overflow via the page parameter at /goform/P2pListFilter.
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Analysis
by VulDB Data Team • 01/01/2023
The vulnerability identified as CVE-2022-45513 affects the Tenda W30E wireless router firmware version 1.0.1.25(633) and represents a critical stack overflow condition that can be exploited through the web interface. This issue manifests within the /goform/P2pListFilter endpoint where the page parameter is processed without adequate input validation or bounds checking. The flaw allows an attacker to manipulate the page parameter in a manner that overflows the stack buffer, potentially leading to arbitrary code execution or system crash. The vulnerability resides in the firmware's handling of user-supplied data through the web management interface, making it accessible to remote attackers who can craft malicious requests to exploit the buffer overflow.
The technical implementation of this vulnerability aligns with CWE-121, which describes stack-based buffer overflow conditions where insufficient bounds checking allows attackers to overwrite adjacent memory locations. The stack overflow occurs when the page parameter exceeds the allocated buffer space within the P2pListFilter function, causing the program to overwrite stack memory including return addresses and local variables. This type of vulnerability typically enables attackers to redirect execution flow through return-oriented programming or direct code injection techniques. The specific nature of the flaw suggests that the firmware does not properly validate the length or content of the page parameter before copying it into a fixed-size stack buffer, creating a predictable exploitation vector.
From an operational perspective, this vulnerability presents significant risk to network security as it allows remote code execution without authentication requirements, potentially enabling attackers to gain full administrative control over the affected device. The exploitation could lead to persistent backdoor access, network reconnaissance, or use of the device as a pivot point for attacking other systems within the local network. The impact extends beyond individual device compromise as compromised routers can serve as entry points for broader network infiltration, particularly in environments where network segmentation is not properly implemented. The vulnerability affects all devices running the specific firmware version, making it a widespread concern for network administrators managing Tenda W30E devices.
Security mitigations for CVE-2022-45513 should prioritize immediate firmware updates from Tenda to address the stack overflow condition through proper input validation and bounds checking. Network segmentation and firewall rules should be implemented to restrict access to the device management interface, particularly when the device is connected to untrusted networks. The principle of least privilege should be applied by limiting access to administrative functions to authorized personnel only, and implementing multi-factor authentication where possible. Regular vulnerability assessments and network monitoring should be conducted to detect potential exploitation attempts. Additionally, network administrators should consider implementing intrusion detection systems that can identify suspicious traffic patterns associated with buffer overflow exploitation attempts, aligning with the ATT&CK framework's T1210 technique for exploiting vulnerabilities in network infrastructure devices. Organizations should also maintain updated inventory records of all network devices to ensure timely patch management and prevent exploitation of known vulnerabilities.