1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
|
#
# ISA_fsa_plugin.py - Filesystem analyser plugin, part of ISA FW
#
# Copyright (c) 2015 - 2016, Intel Corporation
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# * Neither the name of Intel Corporation nor the names of its contributors
# may be used to endorse or promote products derived from this software
# without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
import os
from stat import *
try:
from lxml import etree
except ImportError:
try:
import xml.etree.cElementTree as etree
except ImportError:
import xml.etree.ElementTree as etree
FSAnalyzer = None
class ISA_FSChecker():
initialized = False
def __init__(self, ISA_config):
self.logfile = ISA_config.logdir + "/isafw_fsalog"
self.full_report_name = ISA_config.reportdir + "/fsa_full_report_" + \
ISA_config.machine + "_" + ISA_config.timestamp
self.problems_report_name = ISA_config.reportdir + \
"/fsa_problems_report_" + ISA_config.machine + "_" + ISA_config.timestamp
self.full_reports = ISA_config.full_reports
self.initialized = True
self.setuid_files = []
self.setgid_files = []
self.ww_files = []
self.no_sticky_bit_ww_dirs = []
with open(self.logfile, 'w') as flog:
flog.write("\nPlugin ISA_FSChecker initialized!\n")
def process_filesystem(self, ISA_filesystem):
if (self.initialized):
if (ISA_filesystem.img_name and ISA_filesystem.path_to_fs):
with open(self.logfile, 'a') as flog:
flog.write("Analyzing filesystem at: " + ISA_filesystem.path_to_fs +
" for the image: " + ISA_filesystem.img_name + "\n")
self.files = self.find_fsobjects(ISA_filesystem.path_to_fs)
with open(self.logfile, 'a') as flog:
flog.write("\nFilelist is: " + str(self.files))
if self.full_reports:
with open(self.full_report_name + "_" + ISA_filesystem.img_name, 'w') as ffull_report:
ffull_report.write(
"Report for image: " + ISA_filesystem.img_name + '\n')
ffull_report.write(
"With rootfs location at " + ISA_filesystem.path_to_fs + "\n\n")
for f in self.files:
st = os.lstat(f)
i = f.replace(ISA_filesystem.path_to_fs, "")
if self.full_reports:
with open(self.full_report_name + "_" + ISA_filesystem.img_name, 'a') as ffull_report:
ffull_report.write("File: " + i + ' mode: ' + str(oct(st.st_mode)) +
" uid: " + str(st.st_uid) + " gid: " + str(st.st_gid) + '\n')
if ((st.st_mode & S_ISUID) == S_ISUID):
self.setuid_files.append(i)
if ((st.st_mode & S_ISGID) == S_ISGID):
self.setgid_files.append(i)
if ((st.st_mode & S_IWOTH) == S_IWOTH):
if (((st.st_mode & S_IFDIR) == S_IFDIR) and ((st.st_mode & S_ISVTX) != S_ISVTX)):
self.no_sticky_bit_ww_dirs.append(i)
if (((st.st_mode & S_IFREG) == S_IFREG) and ((st.st_mode & S_IFLNK) != S_IFLNK)):
self.ww_files.append(i)
self.write_problems_report(ISA_filesystem)
self.write_problems_report_xml(ISA_filesystem)
else:
with open(self.logfile, 'a') as flog:
flog.write(
"Mandatory arguments such as image name and path to the filesystem are not provided!\n")
flog.write("Not performing the call.\n")
else:
with open(self.logfile, 'a') as flog:
flog.write(
"Plugin hasn't initialized! Not performing the call.\n")
def write_problems_report(self, ISA_filesystem):
with open(self.problems_report_name + "_" + ISA_filesystem.img_name, 'w') as fproblems_report:
fproblems_report.write(
"Report for image: " + ISA_filesystem.img_name + '\n')
fproblems_report.write(
"With rootfs location at " + ISA_filesystem.path_to_fs + "\n\n")
fproblems_report.write("Files with SETUID bit set:\n")
for item in self.setuid_files:
fproblems_report.write(item + '\n')
fproblems_report.write("\n\nFiles with SETGID bit set:\n")
for item in self.setgid_files:
fproblems_report.write(item + '\n')
fproblems_report.write("\n\nWorld-writable files:\n")
for item in self.ww_files:
fproblems_report.write(item + '\n')
fproblems_report.write(
"\n\nWorld-writable dirs with no sticky bit:\n")
for item in self.no_sticky_bit_ww_dirs:
fproblems_report.write(item + '\n')
def write_problems_report_xml(self, ISA_filesystem):
num_tests = len(self.setuid_files) + len(self.setgid_files) + \
len(self.ww_files) + len(self.no_sticky_bit_ww_dirs)
root = etree.Element(
'testsuite', name='FSA_Plugin', tests=str(num_tests))
if self.setuid_files:
for item in self.setuid_files:
tcase1 = etree.SubElement(
root, 'testcase', classname='Files_with_SETUID_bit_set', name=item)
etree.SubElement(
tcase1, 'failure', message=item, type='violation')
if self.setgid_files:
for item in self.setgid_files:
tcase2 = etree.SubElement(
root, 'testacase', classname='Files_with_SETGID_bit_set', name=item)
etree.SubElement(
tcase2, 'failure', message=item, type='violation')
if self.ww_files:
for item in self.ww_files:
tcase3 = etree.SubElement(
root, 'testase', classname='World-writable_files', name=item)
etree.SubElement(
tcase3, 'failure', message=item, type='violation')
if self.no_sticky_bit_ww_dirs:
for item in self.no_sticky_bit_ww_dirs:
tcase4 = etree.SubElement(
root, 'testcase', classname='World-writable_dirs_with_no_sticky_bit', name=item)
etree.SubElement(
tcase4, 'failure', message=item, type='violation')
tree = etree.ElementTree(root)
output = self.problems_report_name + "_" + ISA_filesystem.img_name + '.xml'
try:
tree.write(output, encoding='UTF-8',
pretty_print=True, xml_declaration=True)
except TypeError:
tree.write(output, encoding='UTF-8', xml_declaration=True)
def find_fsobjects(self, init_path):
list_of_files = []
for (dirpath, dirnames, filenames) in os.walk(init_path):
if (dirpath != init_path):
list_of_files.append(str(dirpath)[:])
for f in filenames:
list_of_files.append(str(dirpath + "/" + f)[:])
return list_of_files
# ======== supported callbacks from ISA ============= #
def init(ISA_config):
global FSAnalyzer
FSAnalyzer = ISA_FSChecker(ISA_config)
def getPluginName():
return "ISA_FSChecker"
def process_filesystem(ISA_filesystem):
global FSAnalyzer
return FSAnalyzer.process_filesystem(ISA_filesystem)
# ==================================================== #
|
