---
id: 8645
title: "How to unc0ver a 0-day in 4 hours or less"
source_domain: projectzero.google
source_url: "https://projectzero.google/2020/07/how-to-unc0ver-0-day-in-4-hours-or-less.html"
published_at: "2020-07-09T00:00:00Z"
tags: ["zero-day", "ios", "jailbreak", "project-zero", "unc0ver"]
phying_url: "https://phying.com/item/8645"
lang: en
---

# How to unc0ver a 0-day in 4 hours or less

## Summary

At 3 PM PDT on May 23, 2020, the unc0ver jailbreak was released for iOS 13.5 (the latest signed version at the time of release) using a zero-day vulnerability and heavy obfuscation. By 7 PM, I had identified the vulnerability and informed Apple. By 1 AM, I had sent Apple a POC and my analysis. This post takes you along that journey.

## Intelligence Metadata

- **Sources:** projectzero.google
- **Published:** 2020-07-09T00:00:00Z
- **Original:** https://projectzero.google/2020/07/how-to-unc0ver-0-day-in-4-hours-or-less.html
- **Phying News:** https://phying.com/item/8645