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Python3 script for macOS to recursively check /Applications and also check /usr/local/bin, /usr/bin, and /usr/sbin for binaries with problematic/interesting entitlements. Also checks for hardened runtime enablement

Python 100.00%

entitlementcheck's Introduction

Entitlement AND Hardened Runtime Check

Wrapper around the codesign binary to recursively check installed apps for problematic entitlements and for whether or not Hardened Runtime is enabled.

Currently the scripts check for the following entitlements:

  • com.apple.security.cs.disable-library-validation
  • com.apple.security.cs-allow-dyld-environment-variables
  • com.apple.security.get-task-allow
  • com.apple.security.cs.allow-unsigned-executable-memory
  • com.apple.security.files.downlaods.read-only
  • com.apple.security.files.downloads.read-write
  • com.apple.security.files.all (deprecated...but you never know...)
  • com.apple.security.files.user-selected.read-only
  • com.apple.security.files.user-selected.read-write
  • com.apple.private.security.clear-library-validation
  • com.apple.private.tcc.allow

NOTE: It is possible that an app can have one or more of the entitlements above while also having hardened runtime enabled (which may mitigate the attack path for abusing the entitlement in question). To check specifically for hardened runtime, run the command below and search for flags in the output:

For Hardened Runtime checks, my script runs the command below and filters based on output:

codesign --display --verbose /Applications/[name]/Contents/MacOS/[name]

The following directories are checked by both the Entitlements and Hardened Runtime Check Scripts:

  • /Applications
  • /System/Applications/Utilities
  • /usr/local/bin
  • /usr/bin
  • /usr/sbin

Steps

Instructions:

  1. Entitlements Check: chmod +x Entitlements_Check.py && ./Entitlements_Check.py OR python3 Entitlements_Check.py
  2. Hardened Runtime Check: chmod +x Hardened_Runtime_Check.py && ./Hardened_Runtime_Check.py OR python3 Hardened_Runtime_Check.py
  3. results will be displayed to stdout. Can simply redirect to an output file as well (ex: python3 Hardened_Runtime_Check.py > outfile.txt)

you can use my Dylib Injection binary at https://github.com/cedowens/Inject_Dylib to validate/test potentially injectable apps found by these scripts

Sample Output

Sample output from Entitlements_Check.py: Image

Sample output from Hardened_Runtime_Check.py: Image

entitlementcheck's People

Contributors

cedowens avatar 0xmachos avatar

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