EntitlementCheck Save

Scripts (python3 and Swift) 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

Project README

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.

The following entitlements are checked currently:

  • 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 - To Run The Swift Versions:

Instructions:

  1. EntitlementCheck.swift: Wrapper around the codesign binary to search for apps/bins with potentially problematic entitlements. Swift version of my original python script at https://github.com/cedowens/EntitlementCheck. Steps:

swiftc -o EntitlementCheck EntitlementCheck.swift

./EntitlementCheck

  1. HardenedRuntimeCheck.swift: Wrapper around the codesign binary to search for apps/bins without hardened runtime enabled. Swift version of my original python script at https://github.com/cedowens/EntitlementCheck. Steps:

swiftc -o HardenedRuntimeCheck HardenedRuntimeCheck.swift

./HardenedRuntimeCheck

Steps - To Run The Python Versions:

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

Open Source Agenda is not affiliated with "EntitlementCheck" Project. README Source: cedowens/EntitlementCheck
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