CVE-2003-0767 in Roger Wilco Graphical Server
Summary
by MITRE
Buffer overflow in RogerWilco graphical server 1.4.1.6 and earlier, dedicated server 0.32a and earlier for Windows, and 0.27 and earlier for Linux and BSD, allows remote attackers to cause a denial of service and execute arbitrary code via a client request with a large length value.
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Analysis
by VulDB Data Team • 12/22/2024
The vulnerability described in CVE-2003-0767 represents a critical buffer overflow condition affecting RogerWilco's graphical server and dedicated server implementations across multiple operating systems. This flaw exists in versions 1.4.1.6 and earlier for Windows graphical servers, 0.32a and earlier for Windows dedicated servers, and 0.27 and earlier for Linux and BSD dedicated servers. The vulnerability stems from inadequate input validation within the server's client request processing mechanism, specifically when handling length parameters in client communications. The buffer overflow occurs when the server receives a client request containing an excessively large length value that exceeds the allocated buffer space, leading to memory corruption and potential code execution.
The technical nature of this vulnerability aligns with CWE-121, which describes heap-based buffer overflow conditions where insufficient bounds checking allows attackers to overwrite adjacent memory locations. The flaw operates at the application layer, specifically within the network protocol handling components of the RogerWilco server software. When a remote attacker crafts a malicious client request with an oversized length field, the server's parsing routine fails to properly validate the input before copying it into a fixed-size buffer. This condition creates a classic stack-based buffer overflow scenario where the overflow can overwrite return addresses, function pointers, and other critical memory segments, potentially enabling arbitrary code execution.
From an operational perspective, this vulnerability presents significant risk to organizations relying on RogerWilco's communication infrastructure. The remote exploit capability means attackers can leverage this vulnerability from outside the network perimeter without requiring local system access or authentication. The impact includes both denial of service conditions where the server crashes and becomes unavailable, as well as potential system compromise where attackers can execute malicious code with the privileges of the running server process. This dual nature makes the vulnerability particularly dangerous as it can be used for both disruptive attacks and more sophisticated compromise operations. The vulnerability affects multiple platforms, increasing the attack surface and making it more challenging to secure all affected systems.
The exploitability of this vulnerability is enhanced by the fact that it requires minimal privileges to execute, as the attack occurs through normal client-server communication channels. Attackers can simply send a malformed request containing an oversized length parameter to trigger the buffer overflow condition. This makes the vulnerability particularly attractive to threat actors seeking to compromise network services. The lack of input sanitization in the server's protocol handling routines creates an ideal environment for exploitation, as the system does not perform adequate bounds checking before processing potentially malicious data. Organizations should implement immediate mitigations including software updates to patched versions, network segmentation to limit exposure, and monitoring for suspicious client request patterns that might indicate exploitation attempts.
Security practitioners should consider this vulnerability in the context of the MITRE ATT&CK framework, particularly under the T1203 category for Exploitation for Client Execution and T1499 for Network Denial of Service. The vulnerability demonstrates how legacy software systems often contain unpatched buffer overflow conditions that can be exploited by adversaries to gain unauthorized access to network services. Organizations should prioritize patch management for this vulnerability and implement network-level controls such as firewalls and intrusion detection systems to monitor for exploitation attempts. Additionally, the vulnerability highlights the importance of input validation and proper bounds checking in server-side applications, principles that are fundamental to secure coding practices and should be integrated into all software development lifecycle processes to prevent similar issues from occurring in the future.