Oasis Safety has recognized a vulnerability in Cursor, an AI-based code editor, that enables hidden code to run as quickly as a person opens a undertaking folder with none motion or warning.
The difficulty 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. Because of this, sure job recordsdata can start executing instructions instantly when a developer opens a folder.
If a person provides a dangerous job to a undertaking 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 device is designed to guard builders from malicious code by blocking automated duties from unknown sources.
The vulnerability exploits the .vscode/duties.json file, which might comprise directions to run duties as quickly as a folder is opened. Attackers can place these directions in a shared undertaking.
In response to 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 instruments or tasks utilized by many individuals.
To remain protected, customers ought to take a couple of steps. First, they need to allow Workspace Belief in Cursor to cease unknown duties from working routinely. Second, it’s suggested to open untrusted tasks utilizing a special code editor, particularly the .vscode folder, earlier than utilizing Cursor.
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