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
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
|
#!/bin/sh
#################################################################################
#
# Lynis
# ------------------
#
# Copyright 2007-2014, Michael Boelen (michael@rootkit.nl), The Netherlands
# Web site: http://www.rootkit.nl
#
# This software is licensed under GPL, version 3. See LICENSE file for
# usage of this software.
#
#################################################################################
#
# Functions
#
#################################################################################
#
# Function Description
# ----------------------- -------------------------------------------------
# AddHP Add Hardening points to plot a graph later
# CheckFilePermissions Check file permissions
# CheckUpdates Determine if a new version of Lynis is available
# counttests Count number of performed tests
# Debug Display additional information on the screen (not suited for cronjob)
# DirectoryExists Check if a directory exists on the disk
# Display Output text to screen with colors and identation
# ExitClean Stop the program (cleanly)
# ExitFatal Stop the program (cleanly), with fatal
# FileExists Check if a file exists on the disk
# FileIsReadable Check if a file is readable or directory accessible
# GetHostID Retrieve an unique ID for this host
# InsertSection Insert a section block
# InsertPluginSection Insert a section block for plugins
# IsRunning Check if a process is running
# ParseNginx Parse nginx configuration lines
# ReportException Add an exception to the report file (for debugging purposes)
# ReportSuggestion Add a suggestion to report file
# ReportWarning Add a warning and priority to report file
# Register Register a test (for logging and execution)
# SafePerms Check if a directory has safe permissions
# SearchItem Search a string in a file
# ViewCategories Display tests categories
# logtext Log text strings to logfile, prefixed with date/time
#
#################################################################################
# Add Hardening Points
AddHP()
{
HPADD=$1; HPADDMAX=$2
HPPOINTS=`expr ${HPPOINTS} + ${HPADD}`
HPTOTAL=`expr ${HPTOTAL} + ${HPADDMAX}`
logtext "Hardening: assigned ${HPADD} hardening points (max for this item: ${HPADDMAX}), current: ${HPPOINTS}, total: ${HPTOTAL}"
}
# Check file permissions
# Parameter 1 is file/dir
# Result: FILE_NOT_FOUND | OK | BAD
CheckFilePermissions()
{
CHECKFILE=$1
if [ ! -d $CHECKFILE -a ! -f $CHECKFILE ]; then
PERMS="FILE_NOT_FOUND"
else
# If 'file' is an directory, use -d
if [ -d ${CHECKFILE} ]; then
FILEVALUE=`ls -d -l ${CHECKFILE} | cut -c 2-10`
PROFILEVALUE=`cat ${PROFILE} | grep '^permdir' | grep ":${CHECKFILE}:" | cut -d: -f3`
else
FILEVALUE=`ls -l ${CHECKFILE} | cut -c 2-10`
PROFILEVALUE=`cat ${PROFILE} | grep '^permfile' | grep ":${CHECKFILE}:" | cut -d: -f3`
fi
if [ "${FILEVALUE}" = "${PROFILEVALUE}" ]; then PERMS="OK"; else PERMS="BAD"; fi
fi
}
################################################################################
# Name : CheckItem()
# Description : Check if a specific item exists in the report
# Returns : <nothing>
################################################################################
CheckItem()
{
ITEM_FOUND=0
if [ $# -eq 2 ]; then
# Don't search in /dev/null, it's too empty there
if [ ! "${REPORTFILE}" = "/dev/null" ]; then
# Check if we can find the main type (with or without brackets)
logtext "Test: search string $2 in earlier discovered results"
FIND=`egrep "^$1(\[\])?=" ${REPORTFILE} | egrep "$2"`
if [ ! "${FIND}" = "" ]; then
ITEM_FOUND=1
logtext "Result: found string"
else
logtext "Result: search string NOT found"
fi
else
logtext "Skipping search, as /dev/null is being used"
fi
else
ReportException ${TEST_NO} "Error in function call to CheckItem"
fi
}
# Check updates
CheckUpdates()
{
# Possible improvement: determine if host binary exists YYY
PROGRAM_LV="0000000000"; DB_MALWARE_LV="0000000000"; DB_FILEPERMS_LV="0000000000"
FIND=`which dig 2> /dev/null`
if [ ! "${FIND}" = "" ]; then
PROGRAM_LV=`dig +short +time=3 -t txt lynis-lv.rootkit.nl 2> /dev/null | grep -v "connection timed out" | sed 's/[".]//g'`
#DB_MALWARE_LV=`dig +short -t txt lynis-mw.rootkit.nl 2> /dev/null | sed 's/[".]//g'`
#DB_FILEPERMS_LV=`dig +short -t txt lynis-fp.rootkit.nl 2> /dev/null | sed 's/[".]//g'`
else
FIND=`which host 2> /dev/null`
if [ ! "${FIND}" = "" ]; then
PROGRAM_LV=`host -t txt -W 3 lynis-lv.rootkit.nl 2> /dev/null | grep -v "connection timed out" | awk '{ if ($1=="lynis-lv.rootkit.nl" && $3=="text") { print $4 }}' | sed 's/"//g'`
if [ "${PROGRAM_LV}" = "" ]; then PROGRAM_LV=0; fi
else
logtext "Result: dig and host not installed, update check skipped"
UPDATE_CHECK_SKIPPED=1
fi
fi
}
# Count the number of performed tests
counttests()
{
CTESTS_PERFORMED=`expr ${CTESTS_PERFORMED} + 1`
}
# Determine if a directory exists
DirectoryExists()
{
DIRECTORY_FOUND=0
logtext "Test: checking if directory $1 exists"
if [ -d $1 ]; then
logtext "Result: directory exists"
DIRECTORY_FOUND=1
else
logtext "Result: directory NOT found"
fi
}
# More information on the screen
Debug()
{
if [ ${DEBUG} -eq 1 ]; then echo "DEBUG: $1"; fi
}
# Display text
Display()
{
INDENT=0; TEXT=""; RESULT=""; COLOR=""
while [ $# -ge 1 ]; do
case $1 in
--color)
shift
case $1 in
GREEN) COLOR=$GREEN ;;
RED) COLOR=$RED ;;
WHITE) COLOR=$WHITE ;;
YELLOW) COLOR=$YELLOW ;;
esac
;;
--indent)
shift
INDENT=$1
;;
--no-break | --nobreak | -nb)
ECHOCMD="echo -en"
;;
--result)
shift
RESULT=$1
;;
--text)
shift
TEXT=$1
;;
*)
echo "INVALID OPTION (Display): $1"
exit 1
;;
esac
# Go to next parameter
shift
done
if [ "${RESULT}" = "" ]; then
RESULTPART=""
else
if [ ${CRONJOB} -eq 0 ]; then
RESULTPART=" [ ${COLOR}${RESULT}${NORMAL} ]"
else
RESULTPART=" [ ${RESULT} ]"
fi
fi
if [ ! "${TEXT}" = "" ]; then
# Show warnings always, and other messages if no quiet is being used
if [ ${QUIET} -eq 0 -o "${RESULT}" = "WARNING" ]; then
# Display
LINESIZE=`echo "${TEXT}" | wc -c | tr -d ' '`
SPACES=`expr 62 - ${INDENT} - ${LINESIZE}`
if [ ${CRONJOB} -eq 0 ]; then
${ECHOCMD} "\033[${INDENT}C${TEXT}\033[${SPACES}C${RESULTPART}"
else
echo "${TEXT}${RESULTPART}"
fi
fi
fi
}
# Clean exit (removing temp files, PID files)
ExitClean()
{
RemovePIDFile
exit 0
}
# Clean exit (removing temp files, PID files), with error code 1
ExitFatal()
{
RemovePIDFile
exit 1
}
# Determine if a file exists
FileExists()
{
FILE_FOUND=0
logtext "Test: checking if file $1 exists"
if [ -f $1 ]; then
logtext "Result: file exists"
FILE_FOUND=1
else
logtext "Result: file NOT found"
fi
}
################################################################################
# Name : FileIsReadable
# Description : Check if a file readable or directory is accessible
# Returns : CANREAD (0 or 1)
################################################################################
FileIsReadable()
{
CHECKFILE=$1
CANREAD=0
if [ -d ${CHECKFILE} ]; then
OTHERPERMS=`ls -d -l ${CHECKFILE} | cut -c 8`
elif [ -f ${CHECKFILE} ]; then
OTHERPERMS=`ls -d -l ${CHECKFILE} | cut -c 8`
else
OTHERPERMS="-"
fi
# Check if we have the read bit
if [ "${OTHERPERMS}" = "r" ]; then
CANREAD=1
fi
}
# Get Host ID
GetHostID()
{
HOSTID="-"
if [ ! "${SHA1SUMBINARY}" = "" ]; then
case "${OS}" in
"AIX")
FIND=`entstat en0 2>/dev/null | grep "Hardware Address" | awk -F ": " '{ print $2 }'`
if [ ! "${FIND}" = "" ]; then
HOSTID=`echo ${FIND} | ${SHA1SUMBINARY} | awk '{ print $1 }'`
else
ReportException "GetHostID" "No MAC address returned on AIX"
fi
;;
"DragonFly" | "FreeBSD")
FIND=`${IFCONFIGBINARY} | grep ether | head -1 | awk '{ print $2 }' | tr '[:upper:]' '[:lower:]'`
if [ ! "${FIND}" = "" ]; then
HOSTID=`echo ${FIND} | sha1`
else
ReportException "GetHostID" "No MAC address returned on DragonFly or FreeBSD"
fi
;;
"Linux")
# Define preferred interfaces
#PREFERRED_INTERFACES="eth0 eth1 eth2 enp0s25"
# Only use ifconfig if no ip binary has been found
if [ ! "${IFCONFIGBINARY}" = "" -a "${IPBINARY}" = "" ]; then
# Determine if we have ETH0 at all (not all Linux distro have this, e.g. Arch)
HASETH0=`${IFCONFIGBINARY} | grep "^eth0"`
# Check if we can find it with HWaddr on the line
FIND=`${IFCONFIGBINARY} 2> /dev/null | grep "^eth0" | grep -v "eth0:" | grep HWaddr | awk '{ print $5 }' | tr '[:upper:]' '[:lower:]'`
# If nothing found, then try first for alternative interface. Else other versions of ifconfig (e.g. Slackware/Arch)
if [ "${FIND}" = "" ]; then
FIND=`${IFCONFIGBINARY} 2> /dev/null | grep HWaddr`
if [ "${FIND}" = "" ]; then
# If possible directly address eth0 to avoid risking gathering the incorrect MAC address.
# If not, then falling back to getting first interface. Better than nothing.
if [ ! "${HASETH0}" = "" ]; then
FIND=`${IFCONFIGBINARY} eth0 2> /dev/null | grep "ether " | awk '{ print $2 }' | tr '[:upper:]' '[:lower:]'`
else
FIND=`${IFCONFIGBINARY} 2> /dev/null | grep "ether " | awk '{ print $2 }' | head -1 | tr '[:upper:]' '[:lower:]'`
if [ "${FIND}" = "" ]; then
ReportException "GetHostID" "No eth0 found (and no ether was found with ifconfig)"
else
logtext "Result: No eth0 found (ether found), using first network interface to determine hostid (with ifconfig)"
fi
fi
else
FIND=`${IFCONFIGBINARY} 2> /dev/null | grep HWaddr | head -1 | awk '{ print $5 }' | tr '[:upper:]' '[:lower:]'`
ReportException "GetHostID" "No eth0 found (but HWaddr was found), using first network interface to determine hostid, with ifconfig"
fi
fi
fi
# Check with ip binary (preferred to ifconfig)
if [ ! "${IPBINARY}" = "" ]; then
# Determine if we have the common available eth0 interface
FIND=`${IPBINARY} addr show eth0 2> /dev/null | egrep "link/ether " | head -1 | awk '{ print $2 }' | tr '[:upper:]' '[:lower:]'`
if [ "${FIND}" = "" ]; then
# Determine the MAC address of first interface with the ip command
FIND=`${IPBINARY} addr show 2> /dev/null | egrep "link/ether " | head -1 | awk '{ print $2 }' | tr '[:upper:]' '[:lower:]'`
if [ "${FIND}" = "" ]; then
ReportException "GetHostID" "Can't create hostid (no MAC addresses found)"
fi
fi
# Check if both commands give the same data
if [ ! "${FIND}" = "" ]; then
HOSTID=`echo ${FIND} | ${SHA1SUMBINARY} | awk '{ print $1 }'`
logtext "Result: Found HostID: ${HOSTID}"
fi
else
ReportException "GetHostID" "Can't create HOSTID, command ip not found"
fi
;;
"MacOS")
FIND=`${IFCONFIGBINARY} en0 | grep ether | head -1 | awk '{ print $2 }' | tr '[:upper:]' '[:lower:]'`
if [ ! "${FIND}" = "" ]; then
HOSTID=`echo ${FIND} | shasum | awk '{ print $1 }'`
else
ReportException "GetHostID" "No MAC address returned on Mac OS"
fi
;;
"NetBSD")
FIND=`${IFCONFIGBINARY} -a | grep "address:" | head -1 | awk '{ print $2 }' | tr '[:upper:]' '[:lower:]'`
if [ ! "${FIND}" = "" ]; then
HOSTID=`echo ${FIND} | sha1`
else
ReportException "GetHostID" "No MAC address returned on NetBSD"
fi
;;
"OpenBSD")
FIND=`${IFCONFIGBINARY} | grep "lladdr " | head -1 | awk '{ print $2 }' | tr '[:upper:]' '[:lower:]'`
if [ ! "${FIND}" = "" ]; then
HOSTID=`echo ${FIND} | sha1`
else
ReportException "GetHostID" "No MAC address returned on OpenBSD"
fi
;;
"Solaris")
INTERFACES_TO_TEST="e1000g1 net0"
FOUND=0
for I in ${INTERFACES_TO_TEST}; do
FIND=`${IFCONFIGBINARY} -a | grep "^${I}"`
if [ ! "${FIND}" = "" ]; then
FOUND=1; logtext "Found interface ${I} on Solaris"
fi
done
if [ ${FOUND} -eq 1 ]; then
FIND=`${IFCONFIGBINARY} ${I} | grep ether | awk '{ if ($1=="ether") { print $2 }}'`
HOSTID=`echo ${FIND} | ${SHA1SUMBINARY} | awk '{ print $1 }'`
else
ReportException "GetHostID" "No interface found op Solaris to create HostID"
fi
;;
*)
ReportException "GetHostID" "Can't create HOSTID as OS is not supported by this function"
;;
esac
else
report "exception[]=No SHA1/SHA1SUM binary found to create HOSTID"
fi
}
# Insert section block
InsertSection()
{
if [ ${QUIET} -eq 0 ]; then
echo ""
echo "[+] ${SECTION}$1${NORMAL}"
echo "------------------------------------"
fi
logtextbreak
logtext "Action: Performing tests from category: $1"
}
# Insert section block for plugins
InsertPluginSection()
{
if [ ${QUIET} -eq 0 ]; then
echo ""
echo "[+] ${MAGENTA}$1${NORMAL}"
echo "------------------------------------"
fi
logtext "Action: Performing plugin tests"
}
# Is a process running?
# Returns: RUNNING
IsRunning()
{
RUNNING=0
FIND=`${PSBINARY} ax | egrep "( |/)$1" | grep -v "grep"`
if [ ! "${FIND}" = "" ]; then
RUNNING=1
logtext "IsRunning: process '$1' found (${FIND})"
else
logtext "IsRunning: process '$1' not found"
fi
}
# Function IsWorldExecutable
IsWorldExecutable()
{
sFILE=$1
FileIsWorldExecutable=""
SYMLINK=0
# Check for symlink
if [ -L ${sFILE} ]; then
if [ ! "${READLINKBINARY}" = "" ]; then
tFILE=`${READLINKBINARY} ${sFILE}`
# Check if we can find the file now
if [ -f ${tFILE} ]; then
sFILE="${tFILE}"
logtext "Result: symlink found, pointing to ${sFILE}"
SYMLINK=1
else
# Check the full path of the symlink, strip the filename, copy the path and linked filename together
tDIR=`echo ${sFILE} | awk '{match($1, "^.*/"); print substr($1, 1, RLENGTH-1)}'`
tFILE="${tDIR}/${tFILE}"
if [ -f ${tFILE} ]; then
sFILE="${tFILE}"
logtext "Result: symlink found, seems to be ${sFILE}"
SYMLINK=1
fi
fi
fi
fi
# Only check the file if it isn't a symlink (after previous check)
if [ -f ${sFILE} -a ! -L ${sFILE} ]; then
FINDVAL=`ls -l ${sFILE} | cut -c 10`
if [ "${FINDVAL}" = "x" ]; then FileIsWorldExecutable="TRUE"; else FileIsWorldExecutable="FALSE"; fi
else
FileIsWorldExecutable="NOSUCHFILE"
fi
}
# Function IsWorldWritable
IsWorldWritable()
{
sFILE=$1
FileIsWorldWritable=""
# Check for symlink
if [ -L ${sFILE} ]; then
if [ ! "${READLINKBINARY}" = "" ]; then
tFILE=`${READLINKBINARY} ${sFILE}`
# Check if we can find the file now
if [ -f ${tFILE} ]; then
sFILE="${tFILE}"
logtext "Result: symlink found, pointing to ${sFILE}"
SYMLINK=1
else
# Check the full path of the symlink, strip the filename, copy the path and linked filename together
tDIR=`echo ${sFILE} | awk '{match($1, "^.*/"); print substr($1, 1, RLENGTH-1)}'`
tFILE="${tDIR}/${tFILE}"
if [ -f ${tFILE} ]; then
sFILE="${tFILE}"
logtext "Result: symlink found, seems to be ${sFILE}"
SYMLINK=1
fi
fi
fi
fi
# Only check the file if it isn't a symlink (after previous check)
if [ -f ${sFILE} -a ! -L ${sFILE} ]; then
FINDVAL=`ls -l ${sFILE} | cut -c 9`
if [ "${FINDVAL}" = "w" ]; then FileIsWorldWritable="TRUE"; else FileIsWorldWritable="FALSE"; fi
else
FileIsWorldWritable="NOSUCHFILE"
fi
}
# Function logtext (redirect data ($1) to log file)
logtext()
{
if [ ! "${LOGFILE}" = "" ]; then
CDATE=`date "+[%H:%M:%S]"`
echo "${CDATE} $1" >> ${LOGFILE}
fi
}
################################################################################
# Name : logtextbreak()
# Description : Add a separator to log file between sections, tests etc
# Returns : <nothing>
logtextbreak()
{
if [ ! "${LOGFILE}" = "" ]; then
CDATE=`date "+[%H:%M:%S]"`
echo "${CDATE} ===---------------------------------------------------------------===" >> ${LOGFILE}
fi
}
################################################################################
# Name : Maid()
# Description : Cleanup service
# Returns : <nothing>
Maid()
{
echo ""; echo "Interrupt detected."
# Remove PID
RemovePIDFile
# Clean up temp files
if [ ! "${TMPFILE}" = "" ]; then if [ -f ${TMPFILE} ]; then rm -f ${TMPFILE}; fi; fi
if [ ! "${TMPFILE2}" = "" ]; then if [ -f ${TMPFILE2} ]; then rm -f ${TMPFILE2}; fi; fi
Display --text "Cleaning up..." --result DONE --color GREEN
# Exit with exit code 1
exit 1
}
# Parse nginx configuration lines
ParseNginx()
{
FIND=`cat ${REPORTFILE} | grep "^nginx_config_option=" | awk -F= '{ if ($1=="nginx_config_option") { print $2 }}' | sed 's/ /:space:/g'`
for I in ${FIND}; do
I=`echo ${I} | sed 's/:space:/ /g' | sed 's/;$//'`
OPTION=`echo ${I} | awk '{ print $1 }'`
VALUE=`echo ${I}| cut -d' ' -f2-`
logtext "Result: found option ${OPTION} with parameters ${VALUE}"
case ${OPTION} in
access_log)
if [ "${VALUE}" = "off" ]; then
logtext "Result: found logging disabled for one virtual host"
NGINX_ACCESS_LOG_DISABLED=1
else
if [ ! -f ${VALUE} ]; then
logtext "Result: could not find referenced log file ${VALUE} in nginx configuration"
NGINX_ACCESS_LOG_MISSING=1
fi
fi
;;
# Headers
add_header)
;;
alias)
NGINX_ALIAS_FOUND=1
;;
allow)
NGINX_ALLOW_FOUND=1
;;
autoindex)
;;
deny)
NGINX_DENY_FOUND=1
;;
expires)
NGINX_EXPIRES_FOUND=1
;;
error_log)
# YYY Check if debug is appended
FIND=`echo ${VALUE} | awk '{ if ($2=="debug") { print 1 } else { print 0 }}'`
if [ ${FIND} -eq 1 ]; then
NGINX_ERROR_LOG_DEBUG=1
fi
# YYY Check if file exists
FILE=`echo ${VALUE} | awk '{ print $1 }'`
if [ ! "${FILE}" = "" ]; then
if [ ! -f ${FILE} ]; then
NGINX_ERROR_LOG_MISSING=1
fi
else
logtext "Warning: did not find a filename after error_log in nginx configuration"
fi
;;
error_page)
;;
fastcgi_intercept_errors)
;;
fastcgi_param)
NGINX_FASTCGI_FOUND=1
NGINX_FASTCGI_PARAMS_FOUND=1
;;
fastcgi_pass)
NGINX_FASTCGI_FOUND=1
NGINX_FASTCGI_PASS_FOUND=1
;;
fastcgi_pass_header)
;;
index)
;;
keepalive_timeout)
;;
listen)
NGINX_LISTEN_FOUND=1
# Test for ssl on listen statement
FIND_SSL=`echo ${VALUE} | grep ssl`
if [ ! "${FIND_SSL}" = "" ]; then NGINX_SSL_ON=1; fi
;;
location)
NGINX_LOCATION_FOUND=1
;;
return)
NGINX_RETURN_FOUND=1
;;
root)
NGINX_ROOT_FOUND=1
;;
server_name)
;;
ssl)
if [ "${VALUE}" = "on" ]; then NGINX_SSL_ON=1; fi
;;
ssl_certificate)
logtext "Found SSL certificate in nginx configuration"
;;
ssl_certificate_key)
;;
ssl_ciphers)
NGINX_SSL_CIPHERS=1
;;
ssl_prefer_server_ciphers)
if [ "${VALUE}" = "on" ]; then NGINX_SSL_PREFER_SERVER_CIPHERS=1; fi
;;
ssl_protocols)
;;
ssl_session_cache)
;;
ssl_session_timeout)
;;
types)
;;
*)
logtext "Found unknown option ${OPTION} in nginx configuration"
;;
esac
done
}
# Function to determine what the real file location is
RealFilename()
{
sFILE=$1
FileIsWorldExecutable=""
SYMLINK=0
# Check for symlink
if [ -L ${sFILE} ]; then
if [ ! "${READLINKBINARY}" = "" ]; then
tFILE=`${READLINKBINARY} ${sFILE}`
# Check if we can find the file now
if [ -f ${tFILE} ]; then
rFILE="${tFILE}"
logtext "Result: symlink found, pointing to ${sFILE}"
SYMLINK=1
else
# Check the full path of the symlink, strip the filename, copy the path and linked filename together
tDIR=`echo ${sFILE} | awk '{match($1, "^.*/"); print substr($1, 1, RLENGTH-1)}'`
tFILE="${tDIR}/${tFILE}"
if [ -f ${tFILE} ]; then
rFILE="${tFILE}"
logtext "Result: symlink found, seems to be ${sFILE}"
fi
fi
fi
else
# No symlinke
rFILE="${sFILE}"
fi
}
################################################################################
# Name : Register()
# Description : Register a test and see if it has to be run
# Returns : SKIPTEST (0 or 1)
Register()
{
# Do not insert a log break, if previous test was not logged
if [ ${SKIPLOGTEST} -eq 0 ]; then logtextbreak; fi
ROOT_ONLY=0; SKIPTEST=0; SKIPLOGTEST=0; TEST_NEED_OS=""; PREQS_MET=""
TEST_NEED_NETWORK=""; TEST_NEED_PLATFORM=""
TOTAL_TESTS=`expr ${TOTAL_TESTS} + 1`
while [ $# -ge 1 ]; do
case $1 in
--description)
shift
TEST_DESCRIPTION=$1
;;
--platform)
shift
TEST_NEED_PLATFORM=$1
;;
--network)
shift
TEST_NEED_NETWORK=$1
;;
--os)
shift
TEST_NEED_OS=$1
;;
--preqs-met)
shift
PREQS_MET=$1
;;
--root-only)
shift
if [ "$1" = "YES" -o "$1" = "yes" ]; then
ROOT_ONLY=1
elif [ "$1" = "NO" -o "$1" = "no" ]; then
ROOT_ONLY=0
else
Debug "Invalid option for --root-only parameter of Register function"
fi
;;
--test-no)
shift
TEST_NO=$1
;;
--weight)
shift
TEST_WEIGHT=$1
;;
*)
echo "INVALID OPTION (Register): $1"
exit 1
;;
esac
# Go to next parameter
shift
done
# Skip if a test is root only and we are running a non-privileged test
if [ ${ROOT_ONLY} -eq 1 -a ! ${MYID} = "0" ]; then
SKIPTEST=1; SKIPREASON="This test needs root permissions"
SKIPPED_TESTS_ROOTONLY="${SKIPPED_TESTS_ROOTONLY}====${TEST_NO}:space:-:space:${TEST_DESCRIPTION}"
#SkipTest "${TEST_NO}:Test:space:requires:space:root:space:permissions:-:-:"
fi
# Skip test if it's configured in profile
if [ ${SKIPTEST} -eq 0 ]; then
FIND=`echo "${TEST_SKIP_ALWAYS}" | grep "${TEST_NO}"`
if [ ! "${FIND}" = "" ]; then SKIPTEST=1; SKIPREASON="Skipped by configuration"; fi
fi
# Skip if test is not in the list
if [ ${SKIPTEST} -eq 0 -a ! "${TESTS_TO_PERFORM}" = "" ]; then
FIND=`echo "${TESTS_TO_PERFORM}" | grep "${TEST_NO}"`
if [ "${FIND}" = "" ]; then SKIPTEST=1; SKIPREASON="Test not in list of tests to perform"; fi
fi
# Do not run scans which have a higher intensity than what we prefer
if [ ${SKIPTEST} -eq 0 -a "${TEST_WEIGHT}" = "H" -a "${SCAN_TEST_HEAVY}" = "NO" ]; then SKIPTEST=1; SKIPREASON="Test to system intensive for scan mode (H)"; fi
if [ ${SKIPTEST} -eq 0 -a "${TEST_WEIGHT}" = "M" -a "${SCAN_TEST_MEDIUM}" = "NO" ]; then SKIPTEST=1; SKIPREASON="Test to system intensive for scan mode (M)"; fi
# Skip test if OS is different than requested
if [ ${SKIPTEST} -eq 0 -a ! -z "${TEST_NEED_OS}" -a ! "${OS}" = "${TEST_NEED_OS}" ]; then
SKIPTEST=1; SKIPREASON="Incorrect guest OS (${TEST_NEED_OS} only)"
if [ ${LOG_INCORRECT_OS} -eq 0 ]; then
SKIPLOGTEST=1
fi
fi
# Check for correct hardware platform
if [ ${SKIPTEST} -eq 0 -a ! -z "${TEST_NEED_PLATFORM}" -a ! "${HARDWARE}" = "${TEST_NEED_PLATFORM}" ]; then SKIPTEST=1; SKIPREASON="Incorrect hardware platform"; fi
# Not all prerequisites met, like missing tool
if [ ${SKIPTEST} -eq 0 -a "${PREQS_MET}" = "NO" ]; then SKIPTEST=1; SKIPREASON="Prerequisities not met (ie missing tool, other type of Linux distribution)"; fi
# Skip test?
if [ ${SKIPTEST} -eq 0 ]; then
# First wait X seconds (depending pause_between_tests)
if [ ${TEST_PAUSE_TIME} -gt 0 ]; then sleep ${TEST_PAUSE_TIME}; fi
# Increase counter for every registered test which is performed
counttests
if [ ${SKIPLOGTEST} -eq 0 ]; then logtext "Performing test ID ${TEST_NO} ($TEST_DESCRIPTION)"; fi
TESTS_EXECUTED="${TEST_NO}|${TESTS_EXECUTED}"
else
if [ ${SKIPLOGTEST} -eq 0 ]; then logtext "Skipped test ${TEST_NO} ($TEST_DESCRIPTION)"; fi
if [ ${SKIPLOGTEST} -eq 0 ]; then logtext "Reason to skip: ${SKIPREASON}"; fi
TESTS_SKIPPED="${TEST_NO}|${TESTS_SKIPPED}"
fi
}
# Remove PID file
RemovePIDFile()
{
# Test if PIDFILE is defined, before checking file presence
if [ ! "${PIDFILE}" = "" ]; then
if [ -f ${PIDFILE} ]; then
rm -f $PIDFILE;
logtext "PID file removed (${PIDFILE})"
else
logtext "PID file not found (${PIDFILE})"
fi
fi
}
# Dump to report file
report()
{
echo "$1" >> ${REPORTFILE}
}
# Log exceptions
ReportException()
{
# 1 parameters
# <ID>:<2 char numeric>|text|
report "exception_event[]=$1|$2|"
logtext "Exception: test has an exceptional event ($1) with text $2"
}
# Log manual actions to report file
ReportManual()
{
# 1 parameters
# <ID>:<2 char numeric>
report "manual_event[]=$1"
logtext "Manual: one or more manual actions are required for further testing of this control/plugin"
}
# Report data (TESTID STATUS IMPACT MESSAGE)
ReportResult()
{
if [ $1 = "" ]; then TESTID="UNKNOWN"; fi
# Status: OK, WARNING, NEUTRAL, SUGGESTION
# Impact: HIGH, SEVERE, LOW,
#report "result[]=TESTID-${TESTID},STATUS-$2,IMPACT-$3,MESSAGE-$4-"
# Reset ID before next test
TESTID=""
}
# Log suggestions to report file
ReportSuggestion()
{
# 2 parameters
# <ID> <suggestion text>
report "suggestion[]=$1|$2|"
logtext "Suggestion: $2 [$1]"
}
# Log warning to report file
ReportWarning()
{
# 3 parameters
# <ID> <priority/impact> <warning text>
if [ "$2" = "L" -o "$2" = "M" -o "$2" = "H" ]; then
# old style warning
report "warning[]=$1|$3|"
logtext "Warning: $3 [$1]"
else
# new style warning
report "warning[]=$1|$2|"
logtext "Warning: $2 [test:$1]"
fi
}
SafePerms()
{
PERMS_OK=0
logtext "Checking permissions of $1"
if [ $# -eq 1 ]; then
IS_PARAMETERS_FILE=`echo $1 | grep "/parameters"`
# Check file permissions
if [ ! -f "$1" ]; then
logtext "Fatal error: file $1 does not exist. Quitting."
echo "Fatal error: file $1 does not exist"
ExitFatal
else
PERMS=`ls -l $1`
# Owner permissions
OWNER=`echo ${PERMS} | awk -F" " '{ print $3 }'`
OWNERID=`ls -n $1 | awk -F" " '{ print $3 }'`
if [ ${PENTESTINGMODE} -eq 0 -a "${IS_PARAMETERS_FILE}" = "" ]; then
if [ ! "${OWNER}" = "root" -a ! "${OWNERID}" = "0" ]; then
echo "Fatal error: file $1 should be owned by user 'root' or similar (found: ${OWNER})."
ExitFatal
fi
else
logtext "Note: Owner permissions of file $1 to be expected similar as the UID executing the process"
fi
# Group permissions
GROUP=`echo ${PERMS} | awk -F" " '{ print $4 }'`
GROUPID=`ls -n $1 | awk -F" " '{ print $4 }'`
if [ ${PENTESTINGMODE} -eq 0 -a "${IS_PARAMETERS_FILE}" = "" ]; then
if [ ! "${GROUP}" = "root" -a ! "${GROUP}" = "wheel" -a ! "${GROUPID}" = "0" ]; then
echo "Fatal error: group owner of directory $1 should be owned by root user, wheel or similar (found: ${GROUP})."
ExitFatal
fi
else
logtext "Note: Group permissions of file $1 to be expected similar as the UID executing the process"
fi
# Other permissions
OTHER_PERMS=`echo ${PERMS} | cut -c8-10`
if [ ! "${OTHER_PERMS}" = "---" ]; then
echo "Fatal error: permissions of file $1 are not strict enough. Access to 'other' should be denied."
ExitFatal
fi
# Set PERMS_OK to 1 if no fatal errors occurred
PERMS_OK=1
logtext "File permissions are OK"
fi
else
logtext "Fatal error: invalid amount of parameters when calling function SafePerms()"
echo "Invalid amount of parameters for function SafePerms()"
ExitFatal
fi
}
################################################################################
# Name : SearchItem()
# Description : Search if a specific string exists in in a file
# Parameters : $1 = search string
# : $2 = file
# Returns : <nothing>
################################################################################
SearchItem()
{
ITEM_FOUND=0
if [ $# -eq 2 ]; then
# Don't search in /dev/null, it's too empty there
if [ -f $2 ]; then
# Check if we can find the main type (with or without brackets)
logtext "Test: search string $1 in file $2"
FIND=`egrep "$1" $2`
if [ ! "${FIND}" = "" ]; then
ITEM_FOUND=1
logtext "Result: found string"
logtext "Full string: ${FILE}"
else
logtext "Result: search string NOT found"
fi
else
logtext "Skipping search, file does not exist"
ReportException ${TEST_NO} "Test is trying to search for a string in nonexistent file"
fi
else
ReportException ${TEST_NO} "Error in function call to CheckItem"
fi
}
# Show result code
ShowResult()
{
case $1 in
OK)
echo "[ ${OK}OK${NORMAL} ]"
;;
WARNING)
echo "[ ${WARNING}WARNING${NORMAL} ]"
# log the warning to our log file
#logtext "Warning: $2"
# add the warning to our report file
#report "warning=$2"
;;
esac
}
ViewCategories()
{
if [ ! "${INCLUDEDIR}" = "" ]; then
InsertSection "Available test categories"
for I in `ls ${INCLUDEDIR}/tests_* | xargs -n 1 basename | sed 's/tests_//' | grep -v "custom.template"`; do
echo " - ${I}"
done
fi
echo ""
exit 0
}
# Wait for [ENTER] or manually break
wait_for_keypress()
{
if [ ! ${QUICKMODE} -eq 1 ]; then
echo ""; echo "[ ${WHITE}Press [ENTER] to continue, or [CTRL]+C to stop${NORMAL} ]"
read void
fi
}
#================================================================================
# Lynis - Copyright 2007-2014, Michael Boelen - www.rootkit.nl - The Netherlands
|