---
id: 1918
title: "Tethered jailbreaks are back"
source_domain: blog.trailofbits.com
source_url: "https://blog.trailofbits.com/2019/09/27/tethered-jailbreaks-are-back/"
published_at: "2019-09-27T19:09:08Z"
tags: ["hardware-security", "mobile-security", "ios", "jailbreak", "exploit", "apple", "iphone", "bootrom", "checkm8"]
phying_url: "https://phying.com/item/1918"
lang: en
---

# Tethered jailbreaks are back

## Summary

Analysis of checkm8, axi0mX's Boot ROM exploit affecting iPhone 4S through X: the immutable Secure ROM flaw enables tethered jailbreaks and is unpatchable, so only A12/A13 devices are safe.

## Intelligence Metadata

- **Sources:** blog.trailofbits.com
- **Published:** 2019-09-27T19:09:08Z
- **Original:** https://blog.trailofbits.com/2019/09/27/tethered-jailbreaks-are-back/
- **Phying News:** https://phying.com/item/1918