On July 8th, 2019, a bombshell 0-Day vulnerability was dropped on Zoom Inc that disclosed how anyone could maliciously join a victim’s Mac to a call with their video camera active simply by visiting a malicious website. Additionally, Zoom left behind a hidden daemon that would re-install the Zoom client after it had been uninstalled. It was later discovered that this “feature” could be abused to allow remote code execution.In this talk, I’ll discuss my communications with Zoom’s security team and the reasoning behind what led to my decision to resort to 0-Day disclosure. Additionally, we’ll walk through the post-disclosure timeline around how this vulnerability went from bad to worse, requiring the Apple security team to step in and use MRT to resolve this vulnerability.
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