CVE-2020-1416 in Visual Studio
Summary
by MITRE
An elevation of privilege vulnerability exists in Visual Studio and Visual Studio Code when they load software dependencies, aka 'Visual Studio and Visual Studio Code Elevation of Privilege Vulnerability'.
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Analysis
by VulDB Data Team • 10/30/2020
The CVE-2020-1416 vulnerability represents a critical elevation of privilege flaw affecting Microsoft Visual Studio and Visual Studio Code development environments. This vulnerability stems from how these integrated development environments handle software dependency loading processes, creating potential pathways for malicious actors to escalate their privileges within the system. The flaw specifically manifests when the development tools process external libraries or packages that are downloaded and installed as part of the project dependencies, opening avenues for privilege escalation attacks that could compromise the entire development environment and underlying system resources.
The technical root cause of this vulnerability lies in the insufficient validation and privilege management during the dependency loading phase of Visual Studio and Visual Studio Code. When these applications process package manifests or dependency configurations, they fail to properly enforce security boundaries that would normally prevent unauthorized privilege escalation. This issue is particularly concerning because development environments typically run with elevated privileges to manage file system operations and execute build processes, making them attractive targets for attackers seeking to gain broader system access. The vulnerability allows an attacker to manipulate the dependency loading process in ways that could result in code execution with higher privileges than originally intended.
From an operational impact perspective, this vulnerability poses significant risks to development teams and organizations that rely heavily on Visual Studio and Visual Studio Code for their software development workflows. Attackers could exploit this flaw to install malicious code within the development environment, potentially compromising source code repositories, stealing sensitive information, or establishing persistent access points. The vulnerability affects both the desktop versions of Visual Studio and the code editor, meaning that development environments across different platforms and deployment scenarios could be at risk. Organizations with multiple developers working in these environments face heightened exposure, as the attack surface expands with each user who interacts with potentially compromised dependencies.
The vulnerability aligns with CWE-276, which addresses improper privilege management, and relates to ATT&CK technique T1068, which covers 'Exploitation for Privilege Escalation.' Security professionals should implement immediate mitigations including updating to patched versions of Visual Studio and Visual Studio Code, implementing strict dependency validation policies, and monitoring for unusual package installations or dependency loading activities. Organizations should also consider restricting internet access for development environments where possible and implementing software composition analysis tools to detect potentially malicious dependencies. Additionally, developers should be trained to verify the authenticity and integrity of all external packages before installation, as this vulnerability specifically targets the trust model inherent in dependency management systems. The remediation efforts should include comprehensive vulnerability scanning of development environments and implementation of secure coding practices that prevent privilege escalation through dependency loading mechanisms.