CVE-2015-4060 in ConnectPro
Summary
by MITRE
Heap-based buffer overflow in the TermProxy (WLTermProxyService.exe) service in Wavelink ConnectPro allows remote attackers to execute arbitrary code via a large HTTP header.
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Analysis
by VulDB Data Team • 04/06/2019
The vulnerability identified as CVE-2015-4060 represents a critical heap-based buffer overflow flaw within the TermProxy component of Wavelink ConnectPro software. This specific vulnerability exists in the WLTermProxyService.exe service which handles terminal proxy operations for wireless communication systems. The flaw manifests when the service processes HTTP headers from incoming network requests without adequate bounds checking, creating an exploitable condition that can be leveraged by remote attackers to execute arbitrary code on affected systems.
This vulnerability falls under the CWE-121 heap-based buffer overflow category, which is classified as a common weakness in software development practices that fail to properly validate input data length before copying it into fixed-size memory buffers. The technical implementation flaw occurs in the HTTP header processing logic where the service does not enforce proper boundary checks on the size of incoming header data, allowing attackers to overflow the allocated heap memory space and potentially overwrite adjacent memory regions including return addresses and control data structures. The vulnerability is particularly concerning because it operates at the service level where it can be triggered by any network-based client attempting to establish communication with the vulnerable system.
The operational impact of this vulnerability extends beyond simple code execution, as it provides attackers with potential full system compromise capabilities. Remote attackers who successfully exploit this vulnerability can gain unauthorized access to the affected Wavelink ConnectPro systems, potentially leading to complete system takeover, data exfiltration, and persistent backdoor establishment. The attack vector is particularly dangerous because it requires no authentication or local access, making it highly attractive to threat actors seeking to compromise wireless communication infrastructure. Systems running the vulnerable service are at risk of being exploited for lateral movement within network environments, especially in industrial control systems and wireless network deployments where such connectivity solutions are commonly implemented.
Mitigation strategies for CVE-2015-4060 should focus on immediate patching of the vulnerable Wavelink ConnectPro software to address the heap buffer overflow condition. Organizations should also implement network segmentation to restrict access to the vulnerable service, deploy intrusion detection systems to monitor for suspicious HTTP header patterns, and consider disabling the TermProxy service if it is not essential for operations. The vulnerability aligns with several ATT&CK techniques including T1059 for command and script interpreter execution, T1071 for application layer protocol usage, and T1105 for remote file execution, making it a significant concern for organizations following MITRE ATT&CK framework assessments. Security teams should also conduct thorough network scanning to identify all instances of vulnerable software and implement proper input validation controls at network boundaries to prevent exploitation attempts.