CVE-2014-3802 in Visual Studio
Summary
by MITRE
msdia.dll in Microsoft Debug Interface Access (DIA) SDK, as distributed in Microsoft Visual Studio before 2013, does not properly validate an unspecified variable before use in calculating a dynamic-call address, which allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted PDB file.
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Analysis
by VulDB Data Team • 12/16/2024
The vulnerability identified as CVE-2014-3802 resides within the Microsoft Debug Interface Access DIA SDK component known as msdia.dll, which is distributed as part of Microsoft Visual Studio versions prior to 2013. This flaw represents a critical security weakness that affects the debugging and development environment used by software developers worldwide. The vulnerability specifically targets the handling of Portable Debug Database files, which are essential components in the debugging process for compiled applications. These PDB files contain debugging information that maps executable code back to source code, enabling developers to debug applications effectively during the development lifecycle.
The technical root cause of this vulnerability stems from improper validation of an unspecified variable within the dynamic-call address calculation mechanism of msdia.dll. When a maliciously crafted PDB file is processed by the DIA SDK, the lack of proper input validation leads to unpredictable behavior in memory management. The variable in question likely controls memory offsets or function pointers used during dynamic linking operations, where the absence of validation allows attackers to manipulate memory addresses through crafted input data. This type of vulnerability falls under the category of memory corruption issues and aligns with CWE-129, which describes improper validation of array indices, and CWE-787, which covers out-of-bounds write operations. The flaw essentially creates a situation where attacker-controlled data can influence the execution flow of the debugging component, potentially leading to arbitrary code execution or system instability.
The operational impact of this vulnerability extends beyond simple denial of service scenarios, as it provides attackers with a potential pathway for remote code execution within the context of the Visual Studio development environment. Attackers could craft specially formatted PDB files that, when loaded by Visual Studio, would trigger the memory corruption vulnerability. This presents a significant risk to development environments where Visual Studio is used, particularly in enterprise settings where developers might unknowingly open or process malicious debug files. The vulnerability is particularly concerning because it operates within the legitimate debugging infrastructure that developers trust, making it difficult to detect malicious activity. When exploited, the vulnerability can result in complete system compromise, allowing attackers to execute arbitrary code with the privileges of the Visual Studio process, which typically runs with elevated permissions. This aligns with ATT&CK technique T1059.001 for command and scripting interpreter, as the exploitation could lead to execution of malicious payloads within the development environment.
Mitigation strategies for CVE-2014-3802 primarily focus on updating to affected Microsoft Visual Studio versions that contain the necessary security patches. Microsoft released updates to address this vulnerability in Visual Studio 2013 and subsequent releases, making it essential for organizations to maintain current Visual Studio installations. Additionally, organizations should implement strict file validation procedures for PDB files, particularly those received from external sources or untrusted repositories. Network-based protections can include implementing content filtering for debug files and restricting access to potentially malicious PDB files through network security controls. The vulnerability also underscores the importance of secure development practices, including proper input validation and memory management in debugging components. Organizations should also consider implementing application whitelisting policies to prevent execution of unauthorized code and establish secure coding guidelines that emphasize the importance of validating all input data, particularly in components that handle debugging information and memory management operations.