blob: 9b548d62353ac945969fc133609ea702f01424d3 (
plain)
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
|
#!/bin/bash
#
# Written by Vandoorselaere Yoann, <yoann@mandrakesoft.com>
#
if [[ -f /etc/security/msec/security.conf ]]; then
. /etc/security/msec/security.conf
else
echo "/etc/security/msec/security.conf don't exist."
exit 1
fi
if [[ ${CHECK_SECURITY} == no ]]; then
exit 0
fi
SECURITY_LOG="/var/log/security.log"
TMP=`mktemp /tmp/secure.XXXXXX`
### New Suid root files detection
if [[ ${CHECK_SUID_ROOT} == yes ]]; then
if [[ -f ${SUID_ROOT_YESTERDAY} ]]; then
if ! diff -u ${SUID_ROOT_YESTERDAY} ${SUID_ROOT_TODAY} > ${SUID_ROOT_DIFF}; then
printf "\nSecurity Warning: Change in Suid Root files found :\n" >> ${TMP}
grep '^+' ${SUID_ROOT_DIFF} | grep -vw "^+++ " | sed 's|^.||' | while read file; do
printf "\t\t- Added suid root files : ${file}\n"
done >> ${TMP}
grep '^-' ${SUID_ROOT_DIFF} | grep -vw "^--- " | sed 's|^.||' | while read file; do
printf "\t\t- Removed suid root files : ${file}\n"
done >> ${TMP}
fi
fi
fi
### New Suid group files detection
if [[ ${CHECK_SUID_GROUP} == yes ]]; then
if [[ -f ${SUID_GROUP_YESTERDAY} ]]; then
if ! diff -u ${SUID_GROUP_YESTERDAY} ${SUID_GROUP_TODAY} > ${SUID_GROUP_DIFF}; then
printf "\nSecurity Warning: Changes in Suid Group files found :\n" >> ${TMP}
grep '^+' ${SUID_GROUP_DIFF} | grep -vw "^+++ " | sed 's|^.||' | while read file; do
printf "\t\t- Added suid group files : ${file}\n"
done >> ${TMP}
grep '^-' ${SUID_GROUP_DIFF} | grep -vw "^--- " | sed 's|^.||' | while read file; do
printf "\t\t- Removed suid group files : ${file}\n"
done >> ${TMP}
fi
fi
fi
### Writable files detection
if [[ ${CHECK_WRITEABLE} == yes ]]; then
if [[ -f ${WRITEABLE_YESTERDAY} ]]; then
if ! diff -u ${WRITEABLE_YESTERDAY} ${WRITEABLE_TODAY} > ${WRITEABLE_DIFF}; then
printf "\nSecurity Warning: Change in World Writeable Files found :\n" >> ${TMP}
grep '^+' ${WRITEABLE_DIFF} | grep -vw "^+++ " | sed 's|^.||' | while read file; do
printf "\t\t- Added writables files : ${file}\n"
done >> ${TMP}
grep '^-' ${WRITEABLE_DIFF} | grep -vw "^--- " | sed 's|^.||' | while read file; do
printf "\t\t- Removed writables files : ${file}\n"
done >> ${TMP}
fi
fi
fi
### Search Non Owned files
if [[ ${CHECK_UNOWNED} == yes ]]; then
if [[ -f ${UNOWNED_USER_YESTERDAY} ]]; then
if ! diff -u ${UNOWNED_USER_YESTERDAY} ${UNOWNED_USER_TODAY} > ${UNOWNED_USER_DIFF}; then
printf "\nSecurity Warning: the following files aren't owned by an user :\n" >> ${TMP}
grep '^+' ${UNOWNED_USER_DIFF} | grep -vw "^+++ " | sed 's|^.||' | while read file; do
printf "\t\t- Added un-owned files : ${file}\n"
done >> ${TMP}
grep '^-' ${UNOWNED_USER_DIFF} | grep -vw "^--- " | sed 's|^.||' | while read file; do
printf "\t\t- Removed un-owned files : ${file}\n"
done >> ${TMP}
fi
fi
if [[ -f ${UNOWNED_GROUP_YESTERDAY} ]]; then
if ! diff -u ${UNOWNED_GROUP_YESTERDAY} ${UNOWNED_GROUP_TODAY} > ${UNOWNED_GROUP_DIFF}; then
printf "\nSecurity Warning: the following files aren't owned by a group :\n" >> ${TMP}
grep '^+' ${UNOWNED_GROUP_DIFF} | grep -vw "^+++ " | sed 's|^.||' | while read file; do
printf "\t\t- Added un-owned files : ${file}\n"
done >> ${TMP}
grep '^-' ${UNOWNED_GROUP_DIFF} | grep -vw "^--- " | sed 's|^.||' | while read file; do
printf "\t\t- Removed un-owned files : ${file}\n"
done >> ${TMP}
fi
fi
fi
### Md5 check for SUID root fileg
if [[ ${CHECK_SUID_MD5} == yes ]]; then
ctrl_md5=0;
if [[ -f ${SUID_MD5_YESTERDAY} ]]; then
if ! diff -u ${SUID_MD5_YESTERDAY} ${SUID_MD5_TODAY} > ${SUID_MD5_DIFF}; then
grep '^+' ${SUID_MD5_DIFF} | grep -vw "^+++ " | sed 's|^.||' | awk '{print $2}' | while read file; do
if cat ${SUID_MD5_YESTERDAY} | awk '{print $2}' | grep -qw ${file}; then
if [[ ${ctrl_md5} == 0 ]]; then
printf "\nSecurity Warning: the md5 checksum for one of your SUID files has changed,\n" >> ${TMP}
printf "\tmaybe an intruder modified one of these suid binary in order to put in a backdoor...\n" >> ${TMP}
ctrl_md5=1;
fi
printf "\t\t- Checksum changed files : ${file}\n"
fi
done >> ${TMP}
fi
fi
fi
### Changed open port
if [[ ${CHECK_OPEN_PORT} == yes ]]; then
if [[ -f ${OPEN_PORT_YESTERDAY} ]]; then
if ! diff -u ${OPEN_PORT_YESTERDAY} ${OPEN_PORT_TODAY} 1> ${OPEN_PORT_DIFF}; then
printf "\nSecurity Warning: There is modifications for port listening on your machine :\n" >> ${TMP}
grep '^+' ${OPEN_PORT_DIFF} | grep -vw "^+++ " | sed 's|^.||' | while read file; do
printf "\t\t- Opened ports : ${file}\n"
done >> ${TMP}
grep '^-' ${OPEN_PORT_DIFF} | grep -vw "^--- " | sed 's|^.||' | while read file; do
printf "\t\t- Closed ports : ${file}\n"
done >> ${TMP}
fi
fi
fi
######## Report ######
if [[ -s ${TMP} ]]; then
Syslog ${TMP}
Ttylog ${TMP}
date=`date`
echo -e "\n\n*** Diff Check, ${date} ***\n" >> ${SECURITY_LOG}
cat ${TMP} >> ${SECURITY_LOG}
Maillog "*** Diff Check, ${date} ***" "${TMP}"
fi
if [[ -f ${TMP} ]]; then
rm -f ${TMP}
fi
|
