CVE-2001-0153 in Visual Studio
Summary
by MITRE
Buffer overflow in VB-TSQL debugger object (vbsdicli.exe) in Visual Studio 6.0 Enterprise Edition allows remote attackers to execute arbitrary commands.
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Analysis
by VulDB Data Team • 05/21/2019
The vulnerability identified as CVE-2001-0153 represents a critical buffer overflow flaw within the Visual Studio 6.0 Enterprise Edition development environment, specifically affecting the VB-TSQL debugger object component known as vbsdicli.exe. This issue arises from inadequate input validation and memory management practices within the debugger's implementation, creating a pathway for malicious exploitation that can lead to arbitrary code execution on vulnerable systems. The vulnerability manifests when the debugger processes malformed input data, causing memory corruption that can be leveraged by remote attackers to gain unauthorized control over affected systems.
The technical nature of this buffer overflow stems from improper bounds checking within the vbsdicli.exe component, which is responsible for debugging Visual Basic applications that utilize TSQL database operations. When an attacker sends specially crafted input data to the debugger, the application fails to validate the length of incoming data before copying it into fixed-size memory buffers. This fundamental flaw in memory management creates a condition where attacker-controlled data can overwrite adjacent memory locations, potentially including return addresses, function pointers, or other critical program state information. The vulnerability aligns with CWE-121, which categorizes buffer overflow conditions where insufficient bounds checking allows attackers to overwrite memory and potentially execute malicious code.
From an operational perspective, this vulnerability presents significant risks to organizations utilizing Visual Studio 6.0 Enterprise Edition, particularly those with network-accessible development environments or systems where the debugger component might be exposed to untrusted network traffic. The remote attack vector means that adversaries can exploit this vulnerability without requiring local access to the system, making it particularly dangerous in enterprise environments where development servers might be accessible from external networks. The potential for arbitrary code execution provides attackers with complete system compromise capabilities, enabling them to install backdoors, exfiltrate sensitive data, or establish persistent access to the compromised development environment.
The security implications extend beyond immediate exploitation as this vulnerability can serve as a foothold for broader attacks within an organization's infrastructure. Development environments often contain sensitive information including source code, database credentials, and internal system architectures that can be valuable to attackers. Additionally, the presence of such vulnerabilities in widely-used development tools like Visual Studio 6.0 can provide attackers with access to multiple systems simultaneously, especially in environments where developers might be running multiple applications or services that could be targeted through this initial compromise. This vulnerability also relates to ATT&CK technique T1059, which covers the execution of malicious code through command and scripting interpreters, as the buffer overflow can enable attackers to execute arbitrary commands on the affected system.
Organizations should implement immediate mitigations including applying available patches from Microsoft, restricting network access to development environments, and implementing network segmentation to limit exposure of vulnerable systems. The vulnerability highlights the importance of proper input validation and memory management practices in software development, aligning with industry standards that emphasize defensive programming techniques. Regular security assessments of development environments and comprehensive vulnerability management programs should be implemented to identify and remediate similar issues before they can be exploited by malicious actors. Given the age of Visual Studio 6.0 and its end-of-life status, organizations should prioritize migrating to supported development environments that include modern security features and regular security updates to prevent similar vulnerabilities from being introduced into their development workflows.