aboutsummaryrefslogtreecommitdiffstats
path: root/cron-sh/security.sh
blob: e5a693a3990a2112314c7a34e29123a7177a2b91 (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
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
#!/bin/bash

LCK=/var/run/msec-security.pid

function cleanup() {
    rm -f $LCK
}

if [ -f $LCK ]; then
    if [ -d /proc/`cat $LCK` ]; then
    	exit 0
    else
    	rm -f $LCK
    fi
fi

echo -n $$ > $LCK

trap cleanup 0

if [[ ! -f /var/lib/msec/security.conf ]]; then
    echo "Can't access /var/lib/msec/security.conf."
    exit 1
fi

. /var/lib/msec/security.conf

if [ -r /etc/security/msec/security.conf ]; then
    . /etc/security/msec/security.conf
fi

if [ -r /etc/sysconfig/msec ]; then
    . /etc/sysconfig/msec
fi

umask ${UMASK_ROOT=077}

[[ ${MAIL_WARN} == yes ]] && [ -z ${MAIL_USER} ] && MAIL_USER="root"

export SUID_ROOT_TODAY="/var/log/security/suid_root.today"
SUID_ROOT_YESTERDAY="/var/log/security/suid_root.yesterday"
SUID_ROOT_DIFF="/var/log/security/suid_root.diff"
export SGID_TODAY="/var/log/security/sgid.today"
SGID_YESTERDAY="/var/log/security/sgid.yesterday"
SGID_DIFF="/var/log/security/sgid.diff"
export SUID_MD5_TODAY="/var/log/security/suid_md5.today"
SUID_MD5_YESTERDAY="/var/log/security/suid_md5.yesterday"
SUID_MD5_DIFF="/var/log/security/suid_md5.diff"
export OPEN_PORT_TODAY="/var/log/security/open_port.today"
OPEN_PORT_YESTERDAY="/var/log/security/open_port.yesterday"
OPEN_PORT_DIFF="/var/log/security/open_port.diff"
export WRITABLE_TODAY="/var/log/security/writable.today"
WRITABLE_YESTERDAY="/var/log/security/writable.yesterday"
WRITABLE_DIFF="/var/log/security/writable.diff"
export UNOWNED_USER_TODAY="/var/log/security/unowned_user.today"
UNOWNED_USER_YESTERDAY="/var/log/security/unowned_user.yesterday"
UNOWNED_USER_DIFF="/var/log/security/unowned_user.diff"
export UNOWNED_GROUP_TODAY="/var/log/security/unowned_group.today"
UNOWNED_GROUP_YESTERDAY="/var/log/security/unowned_group.yesterday"
UNOWNED_GROUP_DIFF="/var/log/security/unowned_group.diff"
export RPM_VA_TODAY="/var/log/security/rpm-va.today"
RPM_VA_YESTERDAY="/var/log/security/rpm-va.yesterday"
RPM_VA_DIFF="/var/log/security/rpm-va.diff"
export RPM_VA_CONFIG_TODAY="/var/log/security/rpm-va-config.today"
RPM_VA_CONFIG_YESTERDAY="/var/log/security/rpm-va-config.yesterday"
RPM_VA_CONFIG_DIFF="/var/log/security/rpm-va-config.diff"
export RPM_QA_TODAY="/var/log/security/rpm-qa.today"
RPM_QA_YESTERDAY="/var/log/security/rpm-qa.yesterday"
RPM_QA_DIFF="/var/log/security/rpm-qa.diff"
export CHKROOTKIT_TODAY="/var/log/security/chkrootkit.today"
CHKROOTKIT_YESTERDAY="/var/log/security/chkrootkit.yesterday"
CHKROOTKIT_DIFF="/var/log/security/chkrootkit.diff"
export EXCLUDE_REGEXP

# Modified filters coming from debian security scripts.
# rootfs is not listed among excluded types, because 
# / is mounted twice, and filtering it would mess with excluded dir list
TYPE_FILTER='(devpts|sysfs|usbfs|tmpfs|binfmt_misc|rpc_pipefs|securityfs|auto|proc|msdos|fat|vfat|iso9660|ncpfs|smbfs|hfs|nfs|afs|coda)'
MOUNTPOINT_FILTER='^\/mnt'
DIR=`awk '$3 !~ /'$TYPE_FILTER'/ && $2 !~ /'$MOUNTPOINT_FILTER'/ \
	{print $2}' /proc/mounts | uniq`
PRINT="%h/%f\n"
EXCLUDEDIR=`awk '$3 ~ /'$TYPE_FILTER'/ || $2 ~ /'$MOUNTPOINT_FILTER'/ \
	{print $2}' /proc/mounts | uniq`
export EXCLUDEDIR

if [[ ! -d /var/log/security ]]; then
    mkdir /var/log/security
fi

if [[ -f ${SUID_ROOT_TODAY} ]]; then
    mv ${SUID_ROOT_TODAY} ${SUID_ROOT_YESTERDAY};
fi

if [[ -f ${SGID_TODAY} ]]; then
    mv ${SGID_TODAY} ${SGID_YESTERDAY};
fi

if [[ -f ${WRITABLE_TODAY} ]]; then
    mv ${WRITABLE_TODAY} ${WRITABLE_YESTERDAY};
fi

if [[ -f ${UNOWNED_USER_TODAY} ]]; then
    mv ${UNOWNED_USER_TODAY} ${UNOWNED_USER_YESTERDAY};
fi

if [[ -f ${UNOWNED_GROUP_TODAY} ]]; then
    mv ${UNOWNED_GROUP_TODAY} ${UNOWNED_GROUP_YESTERDAY};
fi

if [[ -f ${OPEN_PORT_TODAY} ]]; then
    mv -f ${OPEN_PORT_TODAY} ${OPEN_PORT_YESTERDAY}
fi

if [[ -f ${SUID_MD5_TODAY} ]]; then
    mv ${SUID_MD5_TODAY} ${SUID_MD5_YESTERDAY};
fi

if [[ -f ${RPM_VA_TODAY} ]]; then
    mv -f ${RPM_VA_TODAY} ${RPM_VA_YESTERDAY}
fi

if [[ -f ${RPM_VA_CONFIG_TODAY} ]]; then
    mv -f ${RPM_VA_CONFIG_TODAY} ${RPM_VA_CONFIG_YESTERDAY}
fi

if [[ -f ${RPM_QA_TODAY} ]]; then
    mv -f ${RPM_QA_TODAY} ${RPM_QA_YESTERDAY}
fi

if [[ -f ${CHKROOTKIT_TODAY} ]]; then
    mv -f ${CHKROOTKIT_TODAY} ${CHKROOTKIT_YESTERDAY}
fi

netstat -pvlA inet,inet6 2> /dev/null > ${OPEN_PORT_TODAY};

# Hard disk related file check; the less priority the better...
nice --adjustment=+19 /usr/bin/msec_find ${DIR}

if [[ -f ${SUID_ROOT_TODAY} ]]; then
    sort < ${SUID_ROOT_TODAY} > ${SUID_ROOT_TODAY}.tmp
    mv -f ${SUID_ROOT_TODAY}.tmp ${SUID_ROOT_TODAY}
fi

if [[ -f ${SGID_TODAY} ]]; then
    sort < ${SGID_TODAY} > ${SGID_TODAY}.tmp
    mv -f ${SGID_TODAY}.tmp ${SGID_TODAY}
fi

if [[ -f ${WRITABLE_TODAY} ]]; then
    sort < ${WRITABLE_TODAY} | egrep -v '^(/var)?/tmp$' > ${WRITABLE_TODAY}.tmp
    mv -f ${WRITABLE_TODAY}.tmp ${WRITABLE_TODAY}    
fi

if [[ -f ${UNOWNED_USER_TODAY} ]]; then
    sort < ${UNOWNED_USER_TODAY} > ${UNOWNED_USER_TODAY}.tmp
    mv -f ${UNOWNED_USER_TODAY}.tmp ${UNOWNED_USER_TODAY}
fi

if [[ -f ${UNOWNED_GROUP_TODAY} ]]; then
    sort < ${UNOWNED_GROUP_TODAY} > ${UNOWNED_GROUP_TODAY}.tmp
    mv -f ${UNOWNED_GROUP_TODAY}.tmp ${UNOWNED_GROUP_TODAY}
fi

if [[ -f ${SUID_ROOT_TODAY} ]]; then
    while read line; do 
	md5sum ${line}
    done < ${SUID_ROOT_TODAY} > ${SUID_MD5_TODAY}
fi

### rpm database check

if [[ ${RPM_CHECK} == yes ]]; then
    rpm -qa --qf "%{NAME}-%{VERSION}-%{RELEASE}\t%{INSTALLTIME}\n" | sort > ${RPM_QA_TODAY}

    rm -f ${RPM_VA_TODAY}.tmp
    cut -f 1 < ${RPM_QA_TODAY} | grep -v '^dev-[0-9]' | xargs -s 1024 nice --adjustment=+19 rpm -V | grep '^..5' | sort > ${RPM_VA_TODAY}.tmp
    grep -v '^..........c.'  ${RPM_VA_TODAY}.tmp | sed 's/^............//' | sort > ${RPM_VA_TODAY}
    grep '^..........c.'  ${RPM_VA_TODAY}.tmp | sed 's/^............//' | sort > ${RPM_VA_CONFIG_TODAY}
    rm -f ${RPM_VA_TODAY}.tmp
fi

### chkrootkit checks
if [[ ${CHKROOTKIT_CHECK} == yes ]]; then
    if [ -x /usr/sbin/chkrootkit ]; then
	/usr/sbin/chkrootkit ${CHKROOTKIT_OPTION} > ${CHKROOTKIT_TODAY}
    fi
fi

### Functions ###

Syslog() {
    if [[ ${SYSLOG_WARN} == yes ]]; then
    while read line; do
        logger -- "${line}"
    done < ${1}
    fi
}

Ttylog() {
    if [[ ${TTY_WARN} == yes ]]; then
    for i in `w | grep -v "load\|TTY" | grep '^root' | awk '{print $2}'` ; do
        cat ${1} > /dev/$i
    done
    fi
}

Maillog() {
    subject=${1}
    text=${2}
    SOMETHING_TO_SEND=
    
    if [[ ${MAIL_WARN} == yes ]]; then
	if [[ -z ${MAIL_USER} ]]; then 
	    MAIL_USER="root"
	fi
	if [[ -x /bin/mail ]]; then
	    for f in ${text}; do
		if [[ -s $f ]]; then
		    SOMETHING_TO_SEND=1
		    break
		fi
	    done
	    if [[ -z ${SOMETHING_TO_SEND} ]]; then
		if [[ ${MAIL_EMPTY_CONTENT} != no ]]; then
		    /bin/mail -s "${subject}" "${MAIL_USER}" <<EOF
Nothing has changed since the last run.
EOF
                fi
            else
		# remove non-printable characters,
		# see http://qa.mandriva.com/show_bug.cgi?id=36848
		cat ${text} | sed -e 's,[^[:print:]],,' | /bin/mail -s "${subject}" "${MAIL_USER}"
	    fi
	fi
    fi
}

##################

. /usr/share/msec/diff_check.sh
. /usr/share/msec/security_check.sh