Oasis Safety has recognized a vulnerability in Cursor, an AI-based code editor, that permits hidden code to run as quickly as a consumer opens a challenge folder with none motion or warning.
The problem comes from a default setting in Cursor. A security function known as Workspace Belief is disabled by default when this system is first put in. Consequently, sure process recordsdata can start executing instructions instantly when a developer opens a folder.
If a consumer provides a dangerous process to a challenge and shares it on-line, these instructions will run as quickly as one other individual opens the folder in Cursor.
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Cursor is constructed on prime of Visible Studio Code, which additionally consists of the Workspace Belief function. This instrument is designed to guard builders from malicious code by blocking computerized duties from unknown sources.
The vulnerability exploits the .vscode/duties.json file, which might include directions to run duties as quickly as a folder is opened. Attackers can place these directions in a shared challenge.
In accordance with Erez Schwartz from Oasis Safety, this conduct can result in stolen credentials, modified recordsdata, or system entry. It additionally will increase the possibilities of provide chain assaults, the place malicious code spreads by means of instruments or tasks utilized by many individuals.
To remain protected, customers ought to take just a few steps. First, they need to allow Workspace Belief in Cursor to cease unknown duties from working mechanically. Second, it’s suggested to open untrusted tasks utilizing a unique code editor, particularly the .vscode folder, earlier than utilizing Cursor.
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