CVE-2023-29338 in Visual Studio Code
Summary
by MITRE • 05/09/2023
Visual Studio Code Information Disclosure Vulnerability
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Analysis
by VulDB Data Team • 07/10/2025
The CVE-2023-29338 vulnerability represents a critical information disclosure flaw within Visual Studio Code, a widely adopted integrated development environment that serves as the primary coding platform for millions of developers globally. This vulnerability specifically affects the editor's handling of sensitive data during certain operational contexts, creating potential exposure pathways for confidential information that could include authentication tokens, API keys, or other security-sensitive data. The flaw manifests when the application processes specific file operations or user interactions that inadvertently expose internal state information through improper data sanitization mechanisms.
Technical exploitation of this vulnerability occurs through carefully crafted sequences of user actions or file operations that trigger the flawed code path within VS Code's core architecture. The underlying mechanism involves insufficient input validation and output sanitization within the editor's internal data processing pipelines, allowing malicious actors or compromised extensions to extract information that should remain protected within the application's secure boundaries. This type of vulnerability aligns with CWE-200, which specifically addresses information exposure through improper data handling, and represents a classic example of how seemingly benign operations can create security weaknesses when proper data flow controls are absent.
The operational impact of CVE-2023-29338 extends beyond individual developer machines to potentially compromise entire development environments where VS Code serves as the primary tool for application development. Attackers could leverage this vulnerability to extract sensitive credentials stored in environment variables, configuration files, or temporary workspace data that developers might have inadvertently left accessible during their coding sessions. The vulnerability's exploitation risk is particularly concerning given VS Code's extensive ecosystem of extensions and plugins, which could potentially be used as attack vectors to amplify the information disclosure impact. This weakness directly contradicts fundamental security principles outlined in the OWASP Top Ten, specifically addressing the risk of information exposure through improper data handling.
Mitigation strategies for this vulnerability should encompass immediate application of official patches provided by Microsoft, which typically involve enhanced data sanitization routines and improved input validation mechanisms within the editor's core processing functions. Organizations should implement comprehensive security monitoring to detect anomalous behavior patterns that might indicate exploitation attempts, while also reviewing and hardening their development environment configurations to minimize the potential impact of such information disclosure events. The vulnerability's remediation aligns with ATT&CK technique T1552, which covers credentials harvesting through information discovery, and organizations should consider implementing additional security controls such as privilege separation, secure credential storage mechanisms, and regular security assessments of development environments to prevent unauthorized access to sensitive information.