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Apple says former employee exploited ‘rare’ bug to download confidential files after leaving for OpenAI

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On Friday, Apple dropped the bombshell news it was suing OpenAI over the alleged theft of trade secrets, claiming that OpenAI stole Apple’s confidential data and engaged in efforts to learn proprietary information while recruiting former Apple employees.

In accusing OpenAI of stealing secrets about Apple’s unreleased products, Apple revealed that a former employee allegedly siphoned reams of sensitive files from the company’s shared network folders, weeks after leaving Apple for a job at OpenAI.

In its complaint, Apple says the former employee, a system electrical engineer named Chang Liu, allegedly “exploited a rare, previously unknown authentication bug” that allowed access to the company’s network. The bug is classified as a zero-day vulnerability, meaning that Apple had no time to fix it before it was allegedly exploited.

Apple has since fixed the bug and said it terminated the employee’s access once it learned of this “security breach.” In its complaint, Apple said the bug could have allowed a “few other” people to access data on its network, but alleged that only Liu exploited the bug to steal Apple’s confidential information while no longer an employee, citing a check of its server logs.

The disclosure, while light in detail, highlights the challenges that organizations face with protecting sensitive corporate data after employees no longer work there. Companies often move to immediately cut off departing staff from further access to protect any sensitive information from leaving, including inadvertently. Companies that fail to fully decommission their employees’ accounts can face future security lapses, data breaches, or malicious actions by disgruntled staff.

Apple spokespeople did not respond to an email from TechCrunch with questions about the security vulnerability, how it was exploited, and when the company decommissioned the employee’s credentials.

“LOL… so funny.”

In the complaint, Apple alleged that Liu took “dozens of Apple’s confidential hardware-related files” over the course of several weeks while as a new OpenAI employee.

Apple said the files contained “detailed information about unreleased products, engineering presentations, technical specifications, and proprietary project data.”

The company claims Liu failed to return the Apple-issued work laptop he had previously used to access Apple’s network, suggesting it was once able to send and receive files from Apple’s internal systems. The complaint said that Liu allegedly claimed to have “another computer.” While he was at OpenAI, Liu also allegedly misused the access of an acquaintance, Yu-Ting Peng, a then-Apple employee who later went to work for OpenAI. Liu allegedly used Peng’s Apple-issued work laptop “while she was still employed at Apple and he was not.”

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