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Eighteen-year-old Linus Henze dubbed the zero-day macOS vulnerability he found “KeySteal,” which, as demoed in the video above, can be used to disclose all sensitive data stored in the Keychain app.
Henze said he decided to reveal the details to Apple because the bug “is very critical and because the security of macOS users is important to me.”
I’ve decided to submit my keychain exploit to @Apple, even though they did not react, as it is very critical and because the security of macOS users is important to me. I’ve sent them the full details including a patch. For free of course.
— Linus Henze (@LinusHenze) February 28, 2019
After Henze released the video in early February, Apple’s security team reached out to him, but the researcher said he wouldn’t disclose the details without a cash reward, arguing that discovering the vulnerabilities takes time.
“Even if it looks like I’m doing this just for money, this is not my motivation at all in this case,” said Henze. “My motivation is to get Apple to create a bug bounty program. I think that this is the best for both Apple and Researchers.”
Apple has a reward program for iOS that provides money to those who discover bugs, but there is no similar payment system for macOS bugs.
