CVE-2022-45708 in M50
Summary
by MITRE • 12/23/2022
IP-COM M50 V15.11.0.33(10768) was discovered to contain a buffer overflow via the sPortMapIndex parameter in the formDelPortMapping function.
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Analysis
by VulDB Data Team • 12/24/2022
The vulnerability identified as CVE-2022-45708 affects IP-COM M50 devices running firmware version V15.11.0.33(10768) and represents a critical buffer overflow flaw within the device's web interface management functionality. This issue manifests through the sPortMapIndex parameter within the formDelPortMapping function, which processes port mapping deletions in the device's configuration interface. The buffer overflow vulnerability arises when the device fails to properly validate the length of input data passed to the sPortMapIndex parameter, allowing an attacker to provide excessive input that overflows the allocated buffer space. Such buffer overflow conditions typically occur when the application writes more data to a fixed-length buffer than it can accommodate, potentially leading to memory corruption and arbitrary code execution. The vulnerability is particularly concerning as it exists within the device's administrative interface, providing potential attackers with a direct pathway to compromise the device's operational integrity and potentially gain unauthorized access to the network infrastructure it protects.
The technical implementation of this vulnerability stems from inadequate input validation mechanisms within the device's web server component responsible for handling configuration updates. When the formDelPortMapping function processes the sPortMapIndex parameter, it likely employs a fixed-size buffer to store the parameter value without proper bounds checking or length validation. This design flaw aligns with CWE-121, which describes stack-based buffer overflow conditions where insufficient bounds checking allows attackers to overwrite adjacent memory locations. The exploitation of this vulnerability could enable attackers to execute arbitrary code with the privileges of the web server process, potentially leading to complete device compromise and unauthorized network access. Attackers could leverage this vulnerability by crafting malicious requests containing oversized sPortMapIndex values, causing the buffer to overflow and potentially redirecting execution flow to malicious code injected into the memory space.
The operational impact of CVE-2022-45708 extends beyond simple device compromise to encompass broader network security implications for organizations relying on IP-COM M50 devices for network management and security. Once exploited, the vulnerability could allow attackers to gain persistent access to the device's administrative interface, enabling them to modify port mappings, create backdoors, or establish unauthorized network connections. This compromise directly violates the principle of least privilege and could facilitate lateral movement within the network, as attackers might use the device as a stepping stone to access other network segments. The vulnerability also presents risks to network availability, as successful exploitation could potentially cause the device to crash or become unresponsive, leading to denial of service conditions that affect network connectivity and security monitoring capabilities. Organizations utilizing these devices may experience significant operational disruption and security breaches if the vulnerability remains unpatched, particularly in environments where network security appliances serve as critical infrastructure components.
Mitigation strategies for CVE-2022-45708 should prioritize immediate firmware updates from IP-COM to address the buffer overflow vulnerability in the affected M50 device versions. Network administrators should implement network segmentation and access controls to limit exposure of these devices to untrusted networks, while also monitoring network traffic for suspicious activity that might indicate exploitation attempts. The implementation of web application firewalls and intrusion detection systems can help detect and block malicious requests targeting the vulnerable sPortMapIndex parameter. Additionally, organizations should conduct comprehensive vulnerability assessments to identify all instances of affected IP-COM devices within their network infrastructure and establish monitoring procedures to detect potential exploitation attempts. According to ATT&CK framework technique T1210, adversaries may exploit buffer overflow vulnerabilities to gain system-level privileges, making this vulnerability particularly dangerous in enterprise environments where network security appliances are critical to maintaining network integrity and protecting against external threats. Regular security audits and vulnerability management processes should be implemented to ensure timely patching of similar vulnerabilities across all network infrastructure components.