CVE-2022-30286 in PyScript
Summary
by MITRE • 05/09/2022
pyscriptjs (aka PyScript Demonstrator) in PyScript through 2022-05-04 allows a remote user to read Python source code.
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Analysis
by VulDB Data Team • 12/21/2024
The vulnerability CVE-2022-30286 affects pyscriptjs, also known as PyScript Demonstrator, within the PyScript framework up to version 2022-05-04. This security flaw represents a critical information disclosure vulnerability that enables remote attackers to access Python source code files through the web interface. The issue stems from inadequate access controls and improper file handling mechanisms within the PyScript demonstration environment, which is designed to showcase Python code execution capabilities in web browsers.
The technical implementation of this vulnerability occurs through the PyScript demonstrator's web interface where users can interact with Python code samples. When a remote user accesses the vulnerable system, they can exploit the insufficient authorization checks to retrieve Python source code files that should remain protected or restricted. This flaw typically manifests when the application fails to properly validate user requests or enforce proper access controls on file retrieval operations. The vulnerability is particularly concerning because it allows unauthorized access to code that may contain sensitive logic, business rules, or proprietary implementations that should not be publicly accessible.
From an operational impact perspective, this vulnerability compromises the confidentiality of Python source code that may contain intellectual property, business logic, or sensitive algorithms. Attackers can leverage this vulnerability to obtain source code that could reveal implementation details, potentially enabling them to develop targeted exploits against the application or understand the underlying system architecture. The vulnerability affects any organization using PyScript demonstrations in production environments or exposing the demonstrator interface to untrusted users. This includes educational platforms, development environments, and demonstration sites that showcase Python code execution capabilities through web browsers.
The vulnerability aligns with CWE-200, which addresses "Information Exposure," and specifically relates to improper access control mechanisms that allow unauthorized information disclosure. From an ATT&CK framework perspective, this vulnerability maps to T1566.001 "Phishing with Malicious Attachments" and T1005 "Data from Local System" as attackers can potentially use the exposed source code to craft more sophisticated attacks or gain deeper understanding of the target system. The weakness also corresponds to T1528 "Steal Application Access Token" in scenarios where the source code might contain authentication logic or API key references that could be exploited further.
Organizations should immediately upgrade to PyScript versions beyond 2022-05-04 where this vulnerability has been addressed through proper access control implementation and file handling mechanisms. The mitigation strategy involves implementing robust authentication and authorization checks on all file access operations, particularly within demonstration environments. Additional protective measures include restricting access to the PyScript demonstrator interface, implementing proper input validation on all user requests, and ensuring that any exposed code samples are sanitized to remove sensitive information. Network segmentation and monitoring of file access patterns can help detect potential exploitation attempts. Regular security assessments should verify that access controls are properly enforced and that no unintended file exposure occurs through the web interface.