CVE-2023-46554 in X2000R Gh
Summary
by MITRE • 10/25/2023
TOTOLINK X2000R Gh v1.0.0-B20230221.0948.web was discovered to contain a stack overflow via the function formMapDel.
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Analysis
by VulDB Data Team • 02/17/2026
The vulnerability identified as CVE-2023-46554 affects the TOTOLINK X2000R Gh router model running firmware version 1.0.0-B20230221.0948. This issue represents a critical stack overflow condition that emerges within the formMapDel function of the device's web interface. The flaw occurs when processing user-supplied input through the web administration portal, creating an exploitable condition that could allow remote code execution or system compromise. Stack overflow vulnerabilities in network devices pose significant risks as they can be leveraged by attackers to gain unauthorized access to sensitive network infrastructure. The vulnerability specifically manifests in the device's handling of data within the formMapDel function, suggesting that the application fails to properly validate or sanitize input parameters before processing them in memory operations.
The technical implementation of this vulnerability stems from improper input validation mechanisms within the router's web application framework. When the formMapDel function processes incoming data, it likely performs stack operations without adequate bounds checking or memory boundary validation. This allows an attacker to craft malicious input that exceeds the allocated stack buffer space, causing a stack overflow condition that can overwrite adjacent memory locations including return addresses and function pointers. The vulnerability aligns with CWE-121, which describes stack-based buffer overflow conditions, and represents a classic example of insufficient input validation in web applications. The specific function name formMapDel suggests this relates to network mapping or configuration deletion operations within the router's administrative interface, making it particularly dangerous as it could be exploited to modify critical network settings.
The operational impact of this vulnerability extends beyond simple denial of service conditions, as it presents a substantial risk to network security and infrastructure integrity. Remote attackers could potentially execute arbitrary code on the affected device, leading to complete system compromise and unauthorized access to the network. The vulnerability affects the device's web-based management interface, which typically requires authentication but may be accessible from unauthenticated users in some configurations. This could enable attackers to gain administrative privileges, modify router settings, redirect traffic, or establish persistent access points within the network. The affected firmware version indicates this is a relatively recent issue, suggesting that the vulnerability may have been present in multiple firmware releases and could affect a significant number of deployed devices. The stack overflow condition could also potentially cause system crashes or reboots, creating availability issues that could be exploited as part of broader attack campaigns.
Mitigation strategies for CVE-2023-46554 should prioritize immediate firmware updates from TOTOLINK, as the vendor is likely to have released patches addressing this specific stack overflow condition. Network administrators should implement network segmentation and access controls to limit exposure of affected devices, particularly those with direct internet connectivity. The implementation of web application firewalls and intrusion detection systems can help monitor for exploitation attempts targeting this specific vulnerability. Additionally, disabling unnecessary web management interfaces and ensuring that only authorized personnel have access to administrative functions provides additional layers of protection. Security teams should conduct comprehensive vulnerability assessments to identify all affected devices within their network infrastructure and prioritize remediation efforts based on risk exposure. The vulnerability's classification as a stack overflow condition aligns with ATT&CK technique T1203, which covers exploitation for execution through memory corruption vulnerabilities. Organizations should also consider implementing network monitoring to detect anomalous traffic patterns that might indicate exploitation attempts targeting this specific vulnerability in their network infrastructure.