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scripts: add PE .reloc section check to security-check.py

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fanquake 2020-04-13 20:32:19 +08:00
parent 47b94a337e
commit 3e38023af7
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GPG key ID: 2EEB9F5CC09526C1
2 changed files with 22 additions and 8 deletions
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14
contrib/devtools/security-check.py
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@ -158,6 +158,17 @@ def check_PE_HIGH_ENTROPY_VA(executable):
reqbits = 0
return (bits & reqbits) == reqbits
def check_PE_RELOC_SECTION(executable) -> bool:
'''Check for a reloc section. This is required for functional ASLR.'''
p = subprocess.Popen([OBJDUMP_CMD, '-h', executable], stdout=subprocess.PIPE, stderr=subprocess.PIPE, stdin=subprocess.PIPE, universal_newlines=True)
(stdout, stderr) = p.communicate()
if p.returncode:
raise IOError('Error opening file')
for line in stdout.splitlines():
if '.reloc' in line:
return True
return False
def check_PE_NX(executable):
'''NX: DllCharacteristics bit 0x100 signifies nxcompat (DEP)'''
(arch,bits) = get_PE_dll_characteristics(executable)
@ -247,7 +258,8 @@ CHECKS = {
'PE': [
('DYNAMIC_BASE', check_PE_DYNAMIC_BASE),
('HIGH_ENTROPY_VA', check_PE_HIGH_ENTROPY_VA),
('NX', check_PE_NX)
('NX', check_PE_NX),
('RELOC_SECTION', check_PE_RELOC_SECTION)
],
'MACHO': [
('PIE', check_MACHO_PIE),

16
contrib/devtools/test-security-check.py
View file

@ -49,13 +49,15 @@ class TestSecurityChecks(unittest.TestCase):
cc = 'x86_64-w64-mingw32-gcc'
write_testcode(source)
self.assertEqual(call_security_check(cc, source, executable, ['-Wl,--no-nxcompat','-Wl,--no-dynamicbase','-Wl,--no-high-entropy-va']),
(1, executable+': failed DYNAMIC_BASE HIGH_ENTROPY_VA NX'))
self.assertEqual(call_security_check(cc, source, executable, ['-Wl,--nxcompat','-Wl,--no-dynamicbase','-Wl,--no-high-entropy-va']),
(1, executable+': failed DYNAMIC_BASE HIGH_ENTROPY_VA'))
self.assertEqual(call_security_check(cc, source, executable, ['-Wl,--nxcompat','-Wl,--dynamicbase','-Wl,--no-high-entropy-va']),
(1, executable+': failed HIGH_ENTROPY_VA'))
self.assertEqual(call_security_check(cc, source, executable, ['-Wl,--nxcompat','-Wl,--dynamicbase','-Wl,--high-entropy-va']),
self.assertEqual(call_security_check(cc, source, executable, ['-Wl,--no-nxcompat','-Wl,--no-dynamicbase','-Wl,--no-high-entropy-va','-no-pie','-fno-PIE']),
(1, executable+': failed DYNAMIC_BASE HIGH_ENTROPY_VA NX RELOC_SECTION'))
self.assertEqual(call_security_check(cc, source, executable, ['-Wl,--nxcompat','-Wl,--no-dynamicbase','-Wl,--no-high-entropy-va','-no-pie','-fno-PIE']),
(1, executable+': failed DYNAMIC_BASE HIGH_ENTROPY_VA RELOC_SECTION'))
self.assertEqual(call_security_check(cc, source, executable, ['-Wl,--nxcompat','-Wl,--dynamicbase','-Wl,--no-high-entropy-va','-no-pie','-fno-PIE']),
(1, executable+': failed HIGH_ENTROPY_VA RELOC_SECTION'))
self.assertEqual(call_security_check(cc, source, executable, ['-Wl,--nxcompat','-Wl,--dynamicbase','-Wl,--high-entropy-va','-no-pie','-fno-PIE']),
(1, executable+': failed RELOC_SECTION'))
self.assertEqual(call_security_check(cc, source, executable, ['-Wl,--nxcompat','-Wl,--dynamicbase','-Wl,--high-entropy-va','-pie','-fPIE']),
(0, ''))
def test_MACHO(self):