# Authors: Karl MacMillan # # Copyright (C) 2006 Red Hat # see file 'COPYING' for use and warranty information # # This program is free software; you can redistribute it and/or # modify it under the terms of the GNU General Public License as # published by the Free Software Foundation; version 2 only # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program; if not, write to the Free Software # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA # import unittest import sepolgen.audit import sepolgen.refpolicy # syslog message 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""" # audit daemon messages 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""" 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 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) 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 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 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) 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 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 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) 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 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 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) 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 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 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) 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 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 type=AVC_PATH msg=audit(1162850461.778:1113): path="/etc/rc.d/init.d/innd" """ 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""" path1 = """type=AVC_PATH msg=audit(1162852201.019:1225): path="/usr/lib/sa/sa1" """ log2 = """type=AVC_PATH msg=audit(1162852201.019:1225): path="/usr/lib/sa/sa1" 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) 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 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""" 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 """ 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 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 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 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 """ 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 """ 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 """ class TestAVCMessage(unittest.TestCase): def test_defs(self): avc = sepolgen.audit.AVCMessage(audit1) sc = sepolgen.refpolicy.SecurityContext() self.assertEqual(avc.scontext, sc) self.assertEqual(avc.tcontext, sc) self.assertEqual(avc.tclass, "") self.assertEqual(avc.accesses, []) self.assertEqual(avc.ioctlcmd, None) def test_granted(self): avc = sepolgen.audit.AVCMessage(granted1) avc.from_split_string(granted1.split()) self.assertEqual(avc.scontext.user, "user_u") self.assertEqual(avc.scontext.role, "system_r") self.assertEqual(avc.scontext.type, "unconfined_t") self.assertEqual(avc.scontext.level, "s0") self.assertEqual(avc.tcontext.user, "user_u") self.assertEqual(avc.tcontext.role, "object_r") self.assertEqual(avc.tcontext.type, "user_home_t") self.assertEqual(avc.tcontext.level, "s0") self.assertEqual(avc.tclass, "file") self.assertEqual(avc.accesses, ["getattr"]) self.assertEqual(avc.denial, False) def test_xperms(self): """Test that the ioctlcmd field is parsed""" avc = sepolgen.audit.AVCMessage(xperms1) recs = xperms1.split() avc.from_split_string(recs) self.assertEqual(avc.ioctlcmd, 66) def test_xperms_invalid(self): """Test message with invalid value in the ioctlcmd field""" avc = sepolgen.audit.AVCMessage(xperms_invalid) recs = xperms_invalid.split() avc.from_split_string(recs) self.assertIsNone(avc.ioctlcmd) def test_xperms_without(self): """Test message without the ioctlcmd field""" avc = sepolgen.audit.AVCMessage(xperms_without) recs = xperms_without.split() avc.from_split_string(recs) self.assertIsNone(avc.ioctlcmd) def test_from_split_string(self): # syslog message avc = sepolgen.audit.AVCMessage(audit1) recs = audit1.split() avc.from_split_string(recs) self.assertEqual(avc.header, "audit(1158064002.046:4):") self.assertEqual(avc.scontext.user, "user_u") self.assertEqual(avc.scontext.role, "system_r") self.assertEqual(avc.scontext.type, "bluetooth_helper_t") self.assertEqual(avc.scontext.level, "s0-s0:c0") self.assertEqual(avc.tcontext.user, "system_u") self.assertEqual(avc.tcontext.role, "object_r") self.assertEqual(avc.tcontext.type, "xdm_tmp_t") self.assertEqual(avc.tcontext.level, "s0") self.assertEqual(avc.tclass, "file") self.assertEqual(avc.accesses, ["read"]) self.assertEqual(avc.comm, "bluez-pin") self.assertEqual(avc.denial, True) # audit daemon message avc = sepolgen.audit.AVCMessage(audit2) recs = audit2.split() avc.from_split_string(recs) self.assertEqual(avc.header, "audit(1158584779.745:708):") self.assertEqual(avc.scontext.user, "user_u") self.assertEqual(avc.scontext.role, "system_r") self.assertEqual(avc.scontext.type, "vpnc_t") self.assertEqual(avc.scontext.level, "s0") self.assertEqual(avc.tcontext.user, "user_u") self.assertEqual(avc.tcontext.role, "system_r") self.assertEqual(avc.tcontext.type, "vpnc_t") self.assertEqual(avc.tcontext.level, "s0") self.assertEqual(avc.tclass, "capability") self.assertEqual(avc.accesses, ["dac_read_search"]) self.assertEqual(avc.comm, "sh") self.assertEqual(avc.denial, True) class TestPathMessage(unittest.TestCase): def test_from_split_string(self): path = sepolgen.audit.PathMessage(path1) recs = path1.split() path.from_split_string(recs) self.assertEqual(path.path, "/usr/lib/sa/sa1") # TODO - add tests for the other message types # TODO - these tests need a lot of expansion and more examples of # different types of log files class TestAuditParser(unittest.TestCase): def test_parse_string(self): a = sepolgen.audit.AuditParser() a.parse_string(log1) self.assertEqual(len(a.avc_msgs), 11) self.assertEqual(len(a.compute_sid_msgs), 0) self.assertEqual(len(a.invalid_msgs), 0) self.assertEqual(len(a.policy_load_msgs), 0) self.assertEqual(len(a.path_msgs), 1) def test_post_process(self): a = sepolgen.audit.AuditParser() a.parse_string(log2) self.assertEqual(len(a.avc_msgs), 2) self.assertEqual(a.avc_msgs[0].path, "/usr/lib/sa/sa1") self.assertEqual(a.avc_msgs[1].path, "/usr/lib/sa/sa1") def test_parse_file(self): f = open("audit.txt") a = sepolgen.audit.AuditParser() a.parse_file(f) f.close() self.assertEqual(len(a.avc_msgs), 21) self.assertEqual(len(a.compute_sid_msgs), 0) self.assertEqual(len(a.invalid_msgs), 0) self.assertEqual(len(a.policy_load_msgs), 0) def test_parse_xperms(self): """ Test that correct access vectors are generated from a set of AVC denial messages. """ a = sepolgen.audit.AuditParser() a.parse_string(xperms2) av_set = a.to_access() self.assertEqual(len(av_set), 2) av_list = list(sorted(av_set)) self.assertEqual(av_list[0].xperms, {}) self.assertEqual(list(av_list[1].xperms), ["ioctl"]) self.assertEqual(av_list[1].xperms["ioctl"].ranges, [(66,66), (4660,4660), (57005,57005)]) class TestGeneration(unittest.TestCase): def test_generation(self): parser = sepolgen.audit.AuditParser() parser.parse_string(log1) avs = parser.to_access() self.assertEqual(len(avs), 1) def test_genaration_granted(self): parser = sepolgen.audit.AuditParser() parser.parse_string(granted1) avs = parser.to_access() self.assertEqual(len(avs), 0) avs = parser.to_access(only_denials=False) self.assertEqual(len(avs), 1)