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579b863cd7
Perform the following ELF security checks: - PIE: Check for position independent executable (PIE), allowing for address space randomization - NX: Check that no sections are writable and executable (including the stack) - RELRO: Check for read-only relocations, binding at startup - Canary: Check for use of stack canary Also add a check to symbol-check.py that checks that only the subset of allowed libraries is imported (to avoid incompatibilities).
61 lines
2.4 KiB
Python
Executable File
61 lines
2.4 KiB
Python
Executable File
#!/usr/bin/python2
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'''
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Test script for security-check.py
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'''
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from __future__ import division,print_function
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import subprocess
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import sys
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import unittest
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def write_testcode(filename):
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with open(filename, 'w') as f:
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f.write('''
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#include <stdio.h>
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int main()
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{
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printf("the quick brown fox jumps over the lazy god\\n");
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return 0;
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}
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''')
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def call_security_check(cc, source, executable, options):
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subprocess.check_call([cc,source,'-o',executable] + options)
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p = subprocess.Popen(['./security-check.py',executable], stdout=subprocess.PIPE, stderr=subprocess.PIPE, stdin=subprocess.PIPE)
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(stdout, stderr) = p.communicate()
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return (p.returncode, stdout.rstrip())
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class TestSecurityChecks(unittest.TestCase):
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def test_ELF(self):
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source = 'test1.c'
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executable = 'test1'
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cc = 'gcc'
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write_testcode(source)
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self.assertEqual(call_security_check(cc, source, executable, ['-Wl,-zexecstack','-fno-stack-protector','-Wl,-znorelro']),
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(1, executable+': failed PIE NX RELRO Canary'))
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self.assertEqual(call_security_check(cc, source, executable, ['-Wl,-znoexecstack','-fno-stack-protector','-Wl,-znorelro']),
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(1, executable+': failed PIE RELRO Canary'))
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self.assertEqual(call_security_check(cc, source, executable, ['-Wl,-znoexecstack','-fstack-protector-all','-Wl,-znorelro']),
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(1, executable+': failed PIE RELRO'))
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self.assertEqual(call_security_check(cc, source, executable, ['-Wl,-znoexecstack','-fstack-protector-all','-Wl,-znorelro','-pie','-fPIE']),
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(1, executable+': failed RELRO'))
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self.assertEqual(call_security_check(cc, source, executable, ['-Wl,-znoexecstack','-fstack-protector-all','-Wl,-zrelro','-Wl,-z,now','-pie','-fPIE']),
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(0, ''))
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def test_PE(self):
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source = 'test1.c'
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executable = 'test1.exe'
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cc = 'i686-w64-mingw32-gcc'
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write_testcode(source)
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self.assertEqual(call_security_check(cc, source, executable, []),
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(1, executable+': failed PIE NX'))
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self.assertEqual(call_security_check(cc, source, executable, ['-Wl,--nxcompat']),
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(1, executable+': failed PIE'))
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self.assertEqual(call_security_check(cc, source, executable, ['-Wl,--nxcompat','-Wl,--dynamicbase']),
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(0, ''))
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if __name__ == '__main__':
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unittest.main()
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