244 lines
14 KiB
Python
244 lines
14 KiB
Python
# Authors: Karl MacMillan <kmacmillan@mentalrootkit.com>
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#
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# Copyright (C) 2006 Red Hat
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# see file 'COPYING' for use and warranty information
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as
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# published by the Free Software Foundation; version 2 only
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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import unittest
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import sepolgen.audit
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import sepolgen.refpolicy
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# syslog message
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audit1 = """Sep 12 08:26:43 dhcp83-5 kernel: audit(1158064002.046:4): avc: denied { read } for pid=2 496 comm="bluez-pin" name=".gdm1K3IFT" dev=dm-0 ino=3601333 scontext=user_u:system_r:bluetooth_helper_t:s0-s0:c0 tcontext=system_u:object_r:xdm_tmp_t:s0 tclass=file"""
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# audit daemon messages
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audit2 = """type=AVC msg=audit(1158584779.745:708): avc: denied { dac_read_search } for pid=8132 comm="sh" capability=2 scontext=user_u:system_r:vpnc_t:s0 tcontext=user_u:system_r:vpnc_t:s0 tclass=capability"""
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log1 = """type=AVC msg=audit(1158584779.745:708): avc: denied { dac_read_search } for pid=8132 comm="sh" capability=2 scontext=user_u:system_r:vpnc_t:s0 tcontext=user_u:system_r:vpnc_t:s0 tclass=capability
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type=SYSCALL msg=audit(1158584779.745:708): arch=40000003 syscall=195 success=no exit=-13 a0=80d2437 a1=bf9132f8 a2=4c56cff4 a3=0 items=0 ppid=8131 pid=8132 auid=500 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) comm="sh" exe="/bin/bash" subj=user_u:system_r:vpnc_t:s0 key=(null)
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type=AVC msg=audit(1158584779.753:709): avc: denied { dac_override } for pid=8133 comm="vpnc-script" capability=1 scontext=user_u:system_r:vpnc_t:s0 tcontext=user_u:system_r:vpnc_t:s0 tclass=capability
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type=AVC msg=audit(1158584779.753:709): avc: denied { dac_read_search } for pid=8133 comm="vpnc-script" capability=2 scontext=user_u:system_r:vpnc_t:s0 tcontext=user_u:system_r:vpnc_t:s0 tclass=capability
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type=SYSCALL msg=audit(1158584779.753:709): arch=40000003 syscall=195 success=no exit=-13 a0=80d2437 a1=bf910a48 a2=4c56cff4 a3=0 items=0 ppid=8132 pid=8133 auid=500 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) comm="vpnc-script" exe="/bin/bash" subj=user_u:system_r:vpnc_t:s0 key=(null)
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type=AVC msg=audit(1158584779.825:710): avc: denied { dac_override } for pid=8134 comm="vpnc-script" capability=1 scontext=user_u:system_r:vpnc_t:s0 tcontext=user_u:system_r:vpnc_t:s0 tclass=capability
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type=AVC msg=audit(1158584779.825:710): avc: denied { dac_read_search } for pid=8134 comm="vpnc-script" capability=2 scontext=user_u:system_r:vpnc_t:s0 tcontext=user_u:system_r:vpnc_t:s0 tclass=capability
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type=SYSCALL msg=audit(1158584779.825:710): arch=40000003 syscall=195 success=no exit=-13 a0=80d2437 a1=bf910a48 a2=4c56cff4 a3=0 items=0 ppid=8132 pid=8134 auid=500 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) comm="vpnc-script" exe="/bin/bash" subj=user_u:system_r:vpnc_t:s0 key=(null)
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type=AVC msg=audit(1158584780.793:711): avc: denied { dac_override } for pid=8144 comm="sh" capability=1 scontext=user_u:system_r:vpnc_t:s0 tcontext=user_u:system_r:vpnc_t:s0 tclass=capability
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type=AVC msg=audit(1158584780.793:711): avc: denied { dac_read_search } for pid=8144 comm="sh" capability=2 scontext=user_u:system_r:vpnc_t:s0 tcontext=user_u:system_r:vpnc_t:s0 tclass=capability
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type=SYSCALL msg=audit(1158584780.793:711): arch=40000003 syscall=195 success=no exit=-13 a0=80d2437 a1=bfc0ba38 a2=4c56cff4 a3=0 items=0 ppid=8131 pid=8144 auid=500 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) comm="sh" exe="/bin/bash" subj=user_u:system_r:vpnc_t:s0 key=(null)
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type=AVC msg=audit(1158584780.797:712): avc: denied { dac_override } for pid=8145 comm="vpnc-script" capability=1 scontext=user_u:system_r:vpnc_t:s0 tcontext=user_u:system_r:vpnc_t:s0 tclass=capability
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type=AVC msg=audit(1158584780.797:712): avc: denied { dac_read_search } for pid=8145 comm="vpnc-script" capability=2 scontext=user_u:system_r:vpnc_t:s0 tcontext=user_u:system_r:vpnc_t:s0 tclass=capability
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type=SYSCALL msg=audit(1158584780.797:712): arch=40000003 syscall=195 success=no exit=-13 a0=80d2437 a1=bfc0b188 a2=4c56cff4 a3=0 items=0 ppid=8144 pid=8145 auid=500 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) comm="vpnc-script" exe="/bin/bash" subj=user_u:system_r:vpnc_t:s0 key=(null)
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type=AVC msg=audit(1158584780.801:713): avc: denied { dac_override } for pid=8146 comm="vpnc-script" capability=1 scontext=user_u:system_r:vpnc_t:s0 tcontext=user_u:system_r:vpnc_t:s0 tclass=capability
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type=AVC msg=audit(1158584780.801:713): avc: denied { dac_read_search } for pid=8146 comm="vpnc-script" capability=2 scontext=user_u:system_r:vpnc_t:s0 tcontext=user_u:system_r:vpnc_t:s0 tclass=capability
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type=AVC_PATH msg=audit(1162850461.778:1113): path="/etc/rc.d/init.d/innd"
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"""
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granted1 = """type=AVC msg=audit(1188833848.190:34): avc: granted { getattr } for pid=4310 comm="ls" name="foo.pp" dev=sda5 ino=295171 scontext=user_u:system_r:unconfined_t:s0 tcontext=user_u:object_r:user_home_t:s0 tclass=file"""
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path1 = """type=AVC_PATH msg=audit(1162852201.019:1225): path="/usr/lib/sa/sa1"
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"""
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log2 = """type=AVC_PATH msg=audit(1162852201.019:1225): path="/usr/lib/sa/sa1"
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type=SYSCALL msg=audit(1162852201.019:1225): arch=40000003 syscall=11 success=yes exit=0 a0=87271b0 a1=8727358 a2=8727290 a3=8727008 items=0 ppid=6973 pid=6974 auid=0 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) comm="sa1" exe="/bin/bash" subj=system_u:system_r:crond_t:s0-s0:c0.c1023 key=(null)
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type=AVC msg=audit(1162852201.019:1225): avc: denied { execute_no_trans } for pid=6974 comm="sh" name="sa1" dev=dm-0 ino=13061698 scontext=system_u:system_r:crond_t:s0-s0:c0.c1023 tcontext=system_u:object_r:lib_t:s0 tclass=file
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type=AVC msg=audit(1162852201.019:1225): avc: denied { execute } for pid=6974 comm="sh" name="sa1" dev=dm-0 ino=13061698 scontext=system_u:system_r:crond_t:s0-s0:c0.c1023 tcontext=system_u:object_r:lib_t:s0 tclass=file"""
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xperms1 = """type=AVC msg=audit(1516626657.910:4461): avc: denied { ioctl } for pid=4310 comm="test" path="/root/test" ino=8619937 ioctlcmd=0x42 scontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:test_file_t:s0 tclass=file permissive=0
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"""
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xperms2 = """type=AVC msg=audit(1516626657.910:4461): avc: denied { ioctl } for pid=4310 comm="test" path="/root/test" ino=8619937 ioctlcmd=0x42 scontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:test_file_t:s0 tclass=file permissive=0
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type=AVC msg=audit(1516626657.910:4461): avc: denied { ioctl } for pid=4310 comm="test" path="/root/test" ino=8619937 ioctlcmd=0x1234 scontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:test_file_t:s0 tclass=file permissive=0
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type=AVC msg=audit(1516626657.910:4461): avc: denied { ioctl } for pid=4310 comm="test" path="/root/test" ino=8619937 ioctlcmd=0xdead scontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:test_file_t:s0 tclass=file permissive=0
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type=AVC msg=audit(1516626657.910:4461): avc: denied { getattr } for pid=4310 comm="test" path="/root/test" ino=8619937 scontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:test_file_t:s0 tclass=dir permissive=0
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"""
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xperms_invalid = """type=AVC msg=audit(1516626657.910:4461): avc: denied { ioctl } for pid=4310 comm="test" path="/root/test" ino=8619937 ioctlcmd=asdf scontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:test_file_t:s0 tclass=file permissive=0
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"""
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xperms_without = """type=AVC msg=audit(1516626657.910:4461): avc: denied { ioctl } for pid=4310 comm="test" path="/root/test" ino=8619937 scontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:test_file_t:s0 tclass=file permissive=0
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"""
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class TestAVCMessage(unittest.TestCase):
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def test_defs(self):
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avc = sepolgen.audit.AVCMessage(audit1)
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sc = sepolgen.refpolicy.SecurityContext()
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self.assertEqual(avc.scontext, sc)
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self.assertEqual(avc.tcontext, sc)
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self.assertEqual(avc.tclass, "")
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self.assertEqual(avc.accesses, [])
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self.assertEqual(avc.ioctlcmd, None)
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def test_granted(self):
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avc = sepolgen.audit.AVCMessage(granted1)
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avc.from_split_string(granted1.split())
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self.assertEqual(avc.scontext.user, "user_u")
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self.assertEqual(avc.scontext.role, "system_r")
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self.assertEqual(avc.scontext.type, "unconfined_t")
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self.assertEqual(avc.scontext.level, "s0")
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self.assertEqual(avc.tcontext.user, "user_u")
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self.assertEqual(avc.tcontext.role, "object_r")
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self.assertEqual(avc.tcontext.type, "user_home_t")
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self.assertEqual(avc.tcontext.level, "s0")
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self.assertEqual(avc.tclass, "file")
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self.assertEqual(avc.accesses, ["getattr"])
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self.assertEqual(avc.denial, False)
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def test_xperms(self):
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"""Test that the ioctlcmd field is parsed"""
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avc = sepolgen.audit.AVCMessage(xperms1)
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recs = xperms1.split()
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avc.from_split_string(recs)
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self.assertEqual(avc.ioctlcmd, 66)
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def test_xperms_invalid(self):
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"""Test message with invalid value in the ioctlcmd field"""
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avc = sepolgen.audit.AVCMessage(xperms_invalid)
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recs = xperms_invalid.split()
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avc.from_split_string(recs)
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self.assertIsNone(avc.ioctlcmd)
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def test_xperms_without(self):
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"""Test message without the ioctlcmd field"""
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avc = sepolgen.audit.AVCMessage(xperms_without)
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recs = xperms_without.split()
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avc.from_split_string(recs)
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self.assertIsNone(avc.ioctlcmd)
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def test_from_split_string(self):
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# syslog message
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avc = sepolgen.audit.AVCMessage(audit1)
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recs = audit1.split()
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avc.from_split_string(recs)
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self.assertEqual(avc.header, "audit(1158064002.046:4):")
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self.assertEqual(avc.scontext.user, "user_u")
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self.assertEqual(avc.scontext.role, "system_r")
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self.assertEqual(avc.scontext.type, "bluetooth_helper_t")
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self.assertEqual(avc.scontext.level, "s0-s0:c0")
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self.assertEqual(avc.tcontext.user, "system_u")
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self.assertEqual(avc.tcontext.role, "object_r")
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self.assertEqual(avc.tcontext.type, "xdm_tmp_t")
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self.assertEqual(avc.tcontext.level, "s0")
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self.assertEqual(avc.tclass, "file")
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self.assertEqual(avc.accesses, ["read"])
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self.assertEqual(avc.comm, "bluez-pin")
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self.assertEqual(avc.denial, True)
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# audit daemon message
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avc = sepolgen.audit.AVCMessage(audit2)
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recs = audit2.split()
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avc.from_split_string(recs)
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self.assertEqual(avc.header, "audit(1158584779.745:708):")
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self.assertEqual(avc.scontext.user, "user_u")
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self.assertEqual(avc.scontext.role, "system_r")
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self.assertEqual(avc.scontext.type, "vpnc_t")
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self.assertEqual(avc.scontext.level, "s0")
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self.assertEqual(avc.tcontext.user, "user_u")
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self.assertEqual(avc.tcontext.role, "system_r")
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self.assertEqual(avc.tcontext.type, "vpnc_t")
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self.assertEqual(avc.tcontext.level, "s0")
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self.assertEqual(avc.tclass, "capability")
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self.assertEqual(avc.accesses, ["dac_read_search"])
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self.assertEqual(avc.comm, "sh")
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self.assertEqual(avc.denial, True)
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class TestPathMessage(unittest.TestCase):
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def test_from_split_string(self):
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path = sepolgen.audit.PathMessage(path1)
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recs = path1.split()
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path.from_split_string(recs)
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self.assertEqual(path.path, "/usr/lib/sa/sa1")
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# TODO - add tests for the other message types
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# TODO - these tests need a lot of expansion and more examples of
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# different types of log files
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class TestAuditParser(unittest.TestCase):
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def test_parse_string(self):
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a = sepolgen.audit.AuditParser()
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a.parse_string(log1)
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self.assertEqual(len(a.avc_msgs), 11)
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self.assertEqual(len(a.compute_sid_msgs), 0)
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self.assertEqual(len(a.invalid_msgs), 0)
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self.assertEqual(len(a.policy_load_msgs), 0)
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self.assertEqual(len(a.path_msgs), 1)
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def test_post_process(self):
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a = sepolgen.audit.AuditParser()
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a.parse_string(log2)
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self.assertEqual(len(a.avc_msgs), 2)
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self.assertEqual(a.avc_msgs[0].path, "/usr/lib/sa/sa1")
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self.assertEqual(a.avc_msgs[1].path, "/usr/lib/sa/sa1")
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def test_parse_file(self):
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f = open("audit.txt")
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a = sepolgen.audit.AuditParser()
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a.parse_file(f)
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f.close()
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self.assertEqual(len(a.avc_msgs), 21)
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self.assertEqual(len(a.compute_sid_msgs), 0)
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self.assertEqual(len(a.invalid_msgs), 0)
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self.assertEqual(len(a.policy_load_msgs), 0)
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def test_parse_xperms(self):
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""" Test that correct access vectors are generated from a set of AVC
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denial messages. """
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a = sepolgen.audit.AuditParser()
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a.parse_string(xperms2)
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av_set = a.to_access()
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self.assertEqual(len(av_set), 2)
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av_list = list(sorted(av_set))
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self.assertEqual(av_list[0].xperms, {})
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self.assertEqual(list(av_list[1].xperms), ["ioctl"])
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self.assertEqual(av_list[1].xperms["ioctl"].ranges, [(66,66),
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(4660,4660), (57005,57005)])
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class TestGeneration(unittest.TestCase):
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def test_generation(self):
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parser = sepolgen.audit.AuditParser()
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parser.parse_string(log1)
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avs = parser.to_access()
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self.assertEqual(len(avs), 1)
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def test_genaration_granted(self):
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parser = sepolgen.audit.AuditParser()
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parser.parse_string(granted1)
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avs = parser.to_access()
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self.assertEqual(len(avs), 0)
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avs = parser.to_access(only_denials=False)
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self.assertEqual(len(avs), 1)
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