“The vulnerability was discovered through a review of the ways the browser interacts with the file system, specifically looking for common vulnerabilities related to the way browsers process symlinks,” the blog reads.

What is a symlink?

Imperva Red defines symlink or a symbolic link as a type of file that points to another file or directory. It allows the operating system to treat the linked file or directory as if it were at the symlink’s location. A symlink, it says can be useful for creating shortcuts, redirecting file paths, or organizing files in a more flexible way.

However, such links can also be used to introduce vulnerabilities if they are not handled properly.

In Google Chrome’s case, the issue arose from the way the browser interacted with symlinks when processing files and directories. To be specific, the browser did not properly check if the symlink was pointing to a location that was not intended to be accessible, which allowed for the theft of sensitive files, the blog post states.

How symlinks affected Google Chrome?

Explaining how the vulnerability impacted Google Chrome, the firm says that an attacker could create a fake website that offers a new crypto wallet service. The website, then could trick the user into creating a new wallet by requesting that they download their ‘recovery’ keys.

“These keys would actually be a zip file containing a symlink to a sensitive file or folder on the user’s computer, such as a cloud provider credential. When the user unzips and uploads the ‘recovery’ keys back to the website, the symlink would be processed and the attacker would gain access to the sensitive file,” the blog states.

What should Chrome users do?