xorgx304/sandscout

Automatic detection of flaws in iOS sandbox profiles

SandScout

SandScout is a framework to extract, decompile, formally model, and analyze iOS sandbox profiles as logic-based programs. We use our Prolog-based queries to evaluate file-based security properties of the container sandbox profile for iOS 9.0.2 and discover seven classes of exploitable vulnerabilities.

The SandScout paper (SandScout: Automatic Detection of Flaws in iOS Sandbox Profiles), presented at ACM CCS 2016, details the architecture and implementation of SandScout and our findings.

SandScout is open source software released under the 3-clause BSD license.

Authors:

• Luke Deshotels, North Carolina State University
• Răzvan Deaconescu, University POLITEHNICA of Bucharest
• Mihai Chiroiu, University POLITEHNICA of Bucharest
• Lucas Davi, Technische Universitat Darmstadt
• William Enck, North Carolina State University
• Ahmad-Reza Sadeghi, Technische Universitat Darmstadt

Please note that this repo represents the SandScout project as of 2016 when the SandScout paper was published. A more up to date and powerful version can be found in the iOracle repo.

Project files

This is a short explanation of each file you might find in this directory.

test-cases/*.sb: Files ending in .sb are sandbox profiles. The container profile we have been using for testing is from iOS 9.0.2. As of 5/14/16, we had to manually remove a line because of a bug in SandBlaster. This should get fixed soon.

convertToProlog.sh: This is our main shell script. It runs other scripts to convert SBPL to Prolog and output our query results. Usage:

convertToProlog.sh <SBPL Profile> <outputFileForPLFacts> <PLRulesToUse> <outputFileForFactsAndRules>

facts.pl: This is a prolog database of all facts output by our SBPL to Prolog compiler, smartPly.py.

rules.pl: These prolog rules act sort of like functions which help us make queries. Our queries are defined in this file, but they are called by script.pl.

factsAndRules.pl: Concatenation of facts.pl and rules.pl which is used to process queries.

script.pl: This is a script which loads libraries and databases into Prolog and calls our queries.

smartPly.py: This Python script uses the ply library which provides lex and yacc for Python. This is the script that tokenizes and parses SBPL. It also outputs the Prolog facts.

Usage

You should be able to run the whole system by using the following example command:

./convertToProlog.sh containerManualPruning.sb facts.pl rules.pl factsAndRules.pl