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 characteristic referred to as Workspace Belief is disabled by default when this system is first put in. In consequence, sure job information can start executing instructions instantly when a developer opens a folder.
If a consumer provides a dangerous job to a challenge and shares it on-line, these instructions will run as quickly as one other particular person 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 characteristic. This instrument is designed to guard builders from malicious code by blocking automated duties from unknown sources.
The vulnerability exploits the .vscode/duties.json file, which may 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 information, or system entry. It additionally will increase the possibilities of provide chain assaults, the place malicious code spreads by instruments or tasks utilized by many individuals.
To remain secure, customers ought to take a number of steps. First, they need to allow Workspace Belief in Cursor to cease unknown duties from operating robotically. Second, it’s suggested to open untrusted tasks utilizing a distinct code editor, particularly the .vscode folder, earlier than utilizing Cursor.
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