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Doesn't work yet, please ignore

Doesn't work: the image mounts and loads the launchd jobs, but the launchd jobs can only refer to binaries on the DeveloperDiskImage.

I tried adding my own (developer signed) binaries and it didn't work; not sure if I need to do something specific...

  • ./gencert.sh, or just use the existing certs

  • sudo ./patchddi.sh

  • Open cert.pem on your device

  • Settings -> General -> VPN & Device Management -> Worth Doing Badly DDI -> Install

    ** WARNING **: adding a certificate SEVERELY reduces your device's security. (The certificate has an expiry date of 2014 to match Apple's, so I don't think this can be used to sniff network traffic, but I'm not completely sure.) Remove this cert IMMEDIATELY after mounting, or (better) generate your own cert.pem

  • unplug phone (to prevent Xcode from mounting a Developer Disk Image)

  • reboot device

  • use any MacDirtyCow file switcher to switch /System/Library/Lockdown/iPhoneDebug.pem with cert.pem

  • plug in phone

  • ideviceimagemounter DeveloperDiskImageModified.dmg DeveloperDiskImageModified.dmg.signature

  • I couldn't figure out what to do with this, so I just made another debugserver LaunchDaemon that launches on port 24601

  • iproxy 24601 24601

  • lldb can attach to processes:

    • process connect connect://localhost:24601
    • attach <pid>
    • it'll take about a minute to pull the libraries from dyld cache, then it attaches
  • but lldb can't spawn processes:

    • target create /bin/ps
    • process connect connect://localhost:24601
    • run
    • You'll get a sandbox denial in Console.app from debugserver trying to start /bin/ps:

      1 +0.000000 sec [0198/0103]: error: ::posix_spawnp ( pid => 0, path = '/bin/ps', file_actions = , attr = , argv = , envp = ) err = Operation not permitted (0x00000001)

Thanks to @alkalinesec for the approach.

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