CVE-2023-49043 in AX1803
Summary
by MITRE • 11/27/2023
Buffer Overflow vulnerability in Tenda AX1803 v.1.0.0.1 allows a remote attacker to execute arbitrary code via the wpapsk_crypto parameter in the function fromSetWirelessRepeat.
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Analysis
by VulDB Data Team • 12/17/2023
This vulnerability represents a critical buffer overflow condition within the Tenda AX1803 router firmware version 1.0.0.1 which exposes a remote code execution vector through improper input validation. The flaw exists in the fromSetWirelessRepeat function where the wpapsk_crypto parameter is processed without adequate bounds checking, creating an opportunity for attackers to overflow memory buffers and potentially gain unauthorized system access. The vulnerability falls under CWE-121 which describes stack-based buffer overflow conditions where insufficient space is allocated for data, allowing malicious input to overwrite adjacent memory locations. This specific implementation flaw demonstrates poor secure coding practices and inadequate parameter sanitization that directly violates industry standards for memory safety.
The operational impact of this vulnerability extends beyond simple denial of service to encompass full system compromise capabilities. An attacker exploiting this buffer overflow can manipulate the program execution flow by overwriting return addresses and function pointers within the stack memory. This allows for arbitrary code execution with the privileges of the affected service, typically root or administrator level access to the router's operating system. The remote nature of the attack means no physical access or local network presence is required, making it particularly dangerous for network administrators who may not immediately detect such compromises. The vulnerability aligns with ATT&CK technique T1210 which covers exploitation of remote services through buffer overflow attacks, demonstrating how legacy vulnerabilities can persist in consumer networking equipment.
Mitigation strategies must address both immediate remediation and long-term architectural improvements. The primary solution involves updating to firmware versions that properly validate input parameters and implement proper bounds checking for all user-supplied data. Network administrators should implement network segmentation and access controls to limit exposure, while also monitoring for unusual network traffic patterns that might indicate exploitation attempts. Additional defensive measures include disabling unnecessary wireless features, implementing strong authentication mechanisms, and regularly auditing network device configurations. The vulnerability highlights the importance of secure software development practices and proper input validation, which aligns with OWASP Top 10 security principles and emphasizes the need for regular security assessments of network infrastructure components. Organizations should also consider implementing intrusion detection systems specifically designed to identify buffer overflow exploitation attempts and maintain comprehensive network monitoring to detect potential compromise of network devices.