CVE-2020-1192 in Visual Studio Code
Summary
by MITRE
A remote code execution vulnerability exists in Visual Studio Code when the Python extension loads workspace settings from a notebook file, aka 'Visual Studio Code Python Extension Remote Code Execution Vulnerability'. This CVE ID is unique from CVE-2020-1171.
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Analysis
by VulDB Data Team • 07/09/2025
The vulnerability identified as CVE-2020-1192 represents a critical remote code execution flaw within Microsoft Visual Studio Code's Python extension ecosystem. This security weakness specifically manifests when the extension processes workspace configuration data extracted from notebook files, creating an attack surface that adversaries can exploit to execute arbitrary code on affected systems. The vulnerability's significance stems from the widespread adoption of Visual Studio Code as a primary development environment, combined with the Python extension's prevalence in data science and software development workflows. The flaw enables attackers to craft malicious notebook files that, when loaded by the Python extension, trigger remote code execution capabilities without requiring user interaction beyond opening the compromised file within the IDE.
The technical root cause of this vulnerability lies in insufficient input validation and sanitization mechanisms within the Python extension's handling of notebook workspace settings. When Visual Studio Code loads a notebook file containing workspace configuration data, the Python extension processes this information without adequate security controls to prevent malicious payload injection. This processing occurs during the automatic workspace configuration loading phase, where the extension reads and interprets metadata from notebook files to establish development environment settings. The vulnerability is classified under CWE-470 as the use of insecure deserialization of untrusted data, where the extension's deserialization logic fails to properly validate the integrity and safety of notebook metadata before processing. Attackers can leverage this weakness by embedding malicious code within notebook files that contain specially crafted workspace configuration sections, which are then executed when the Python extension loads the file.
The operational impact of CVE-2020-1192 extends beyond simple code execution, as it can lead to complete system compromise when attackers leverage the vulnerability. An attacker who gains the ability to place malicious notebook files in a shared workspace or convince a victim to open a compromised file can execute arbitrary commands with the privileges of the user running Visual Studio Code. This includes potential data exfiltration, privilege escalation, and persistence mechanisms that could allow long-term access to development environments. The vulnerability particularly affects organizations that rely heavily on notebook-based workflows, such as data science teams, research institutions, and development organizations that use Jupyter notebooks integrated with Visual Studio Code. The attack vector typically involves social engineering campaigns where malicious files are disguised as legitimate notebook content, or through compromised shared repositories where attackers can inject malicious code into existing notebook files.
Mitigation strategies for CVE-2020-1192 should prioritize immediate patching of the affected Visual Studio Code Python extension to the latest secure versions that address the deserialization vulnerability. Organizations should implement network-level controls such as content filtering and file type restrictions to prevent the automatic loading of potentially malicious notebook files, particularly in shared or public development environments. The principle of least privilege should be enforced by running Visual Studio Code with minimal user permissions and avoiding execution with elevated privileges. Security monitoring should include detection of unusual notebook file access patterns and suspicious workspace configuration changes that might indicate exploitation attempts. Additionally, organizations should consider implementing secure development practices such as code signing verification for notebook files, regular security scanning of development environments, and comprehensive incident response procedures that account for IDE-based vulnerabilities. The ATT&CK framework categorizes this vulnerability under T1059 for command and script interpreter, and T1133 for external remote services, highlighting the multi-stage nature of attacks that can leverage such vulnerabilities to establish persistent access to development environments.