CVE-2024-22916 in Go-RT-AC750
Summary
by MITRE • 01/17/2024
In D-LINK Go-RT-AC750 v101b03, the sprintf function in the sub_40E700 function within the cgibin is susceptible to stack overflow.
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Analysis
by VulDB Data Team • 08/30/2024
The vulnerability identified as CVE-2024-22916 affects the D-LINK Go-RT-AC750 router model running firmware version v101b03, representing a critical stack buffer overflow condition within the web interface component. This flaw exists in the cgi-bin module where the sprintf function is improperly utilized within the sub_40E700 function, creating an exploitable condition that can be leveraged by remote attackers to execute arbitrary code on the affected device. The vulnerability stems from insufficient input validation and improper buffer management during string formatting operations, which allows attackers to overwrite adjacent stack memory regions and potentially gain unauthorized access to the router's operating system.
The technical implementation of this vulnerability involves the use of the sprintf function without adequate bounds checking, which is a classic pattern that aligns with CWE-121 Stack-based Buffer Overflow. When user-supplied input is passed directly to sprintf without proper size limitations, the function continues writing data beyond the allocated buffer space, leading to stack corruption. This particular implementation within the cgi-bin interface suggests that the vulnerability is accessible through web-based attacks, likely via HTTP parameters or form submissions that are processed by the affected sub_40E700 function. The attack surface is significantly expanded due to the router's web management interface being publicly accessible, making this vulnerability particularly dangerous in unpatched networks.
From an operational impact perspective, this vulnerability creates substantial risk for network security and device integrity. An attacker who successfully exploits this stack overflow could gain root access to the router, enabling them to modify network configurations, redirect traffic, install malicious firmware, or use the device as a pivot point for attacking other systems within the local network. The attack vector is particularly concerning because it requires no physical access to the device and can be executed remotely through the web interface, making it a prime target for automated exploitation campaigns. The potential for lateral movement within networks increases significantly since routers often serve as central points of control for network traffic and security policies.
Security mitigations for this vulnerability should include immediate firmware updates from D-LINK to address the buffer overflow condition in the sprintf implementation. Network administrators should also implement network segmentation and access controls to limit exposure of the affected devices to untrusted networks. Additional defensive measures include monitoring for unusual traffic patterns or exploitation attempts targeting the cgi-bin interface, implementing web application firewalls to filter malicious input, and conducting regular vulnerability assessments of network infrastructure. The remediation process must address the root cause by ensuring proper bounds checking and input validation before string formatting operations, aligning with best practices for secure coding and addressing the underlying CWE-121 vulnerability classification. Organizations should also consider the ATT&CK framework's T1059.007 technique for command and script injection, as this vulnerability could enable similar attack patterns through the exploitation of the router's command execution capabilities.