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12.11_find_sgid_files.sh

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This commit is contained in:
thibault.dewailly 2016-04-16 12:57:24 +02:00
parent d241ae57f9
commit fffd9842d6
5 changed files with 95 additions and 8 deletions
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32
bin/hardening/10.2_disable_system_accounts.sh
View File

@ -19,7 +19,20 @@ RESULT=''
# This function will be called if the script status is on enabled / audit mode
audit () {
info "Checking if admin accounts have login different from $SHELL"
eval $(RESULT=$(egrep -v "^\+" $FILE | awk -F: '($1!="root" && $1!="sync" && $1!="shutdown" && $1!="halt" && $3<1000 && $7!="/usr/sbin/nologin" && $7!="/bin/false") {print}' | grep -v "$EXCEPTIONS"))
RESULT=$(egrep -v "^\+" $FILE | awk -F: '($1!="root" && $1!="sync" && $1!="shutdown" && $1!="halt" && $3<1000 && $7!="/usr/sbin/nologin" && $7!="/bin/false") {print}')
for LINE in $RESULT; do
debug "line : $LINE"
ACCOUNT=$( echo $LINE | cut -d: -f 1 )
debug "Account : $ACCOUNT"
debug "Exceptions : $EXCEPTIONS"
debug "echo \"$EXCEPTIONS\" | grep -q $ACCOUNT"
if echo "$EXCEPTIONS" | grep -q $ACCOUNT; then
debug "$ACCOUNT is confirmed as an exception"
RESULT=$(sed "s!$LINE!!" <<< "$RESULT")
else
debug "$ACCOUNT not found in exceptions"
fi
done
if [ ! -z "$RESULT" ]; then
crit "Some admin accounts have not $SHELL as shell"
crit "$RESULT"
@ -30,7 +43,20 @@ audit () {
# This function will be called if the script status is on enabled mode
apply () {
eval $(RESULT=$(egrep -v "^\+" $FILE | awk -F: '($1!="root" && $1!="sync" && $1!="shutdown" && $1!="halt" && $3<1000 && $7!="/usr/sbin/nologin" && $7!="/bin/false") {print}' | grep -v "$EXCEPTIONS"))
RESULT=$(egrep -v "^\+" $FILE | awk -F: '($1!="root" && $1!="sync" && $1!="shutdown" && $1!="halt" && $3<1000 && $7!="/usr/sbin/nologin" && $7!="/bin/false") {print}')
for LINE in $RESULT; do
debug "line : $LINE"
ACCOUNT=$( echo $LINE | cut -d: -f 1 )
debug "Account : $ACCOUNT"
debug "Exceptions : $EXCEPTIONS"
debug "echo \"$EXCEPTIONS\" | grep -q $ACCOUNT"
if echo "$EXCEPTIONS" | grep -q $ACCOUNT; then
debug "$ACCOUNT is confirmed as an exception"
RESULT=$(sed "s!$LINE!!" <<< "$RESULT")
else
debug "$ACCOUNT not found in exceptions"
fi
done
if [ ! -z "$RESULT" ]; then
warn "Some admin accounts have not $SHELL as shell"
warn "$RESULT"
@ -45,7 +71,7 @@ apply () {
# This function will check config parameters required
check_config() {
if [ -z $EXCEPTIONS ]; then
if [ -z "$EXCEPTIONS" ]; then
EXCEPTIONS="@"
fi
}

7
bin/hardening/12.10_find_suid_files.sh
View File

@ -19,16 +19,15 @@ audit () {
for BINARY in $RESULT; do
if grep -q $BINARY <<< "$EXCEPTIONS"; then
debug "$BINARY is confirmed as an exception"
RESULT=$(sed '!'"$BINARY"'!d' <<< $RESULT)
RESULT=$(sed "s!$BINARY!!" <<< $RESULT)
fi
done
if [ ! -z "$RESULT" ]; then
crit "Some world writable file are present"
crit "Some suid files are present"
FORMATTED_RESULT=$(sed "s/ /\n/g" <<< $RESULT | sort | uniq | tr '\n' ' ')
crit "$FORMATTED_RESULT"
else
ok "No world writable files found"
ok "No unknown suid files found"
fi
}

58
bin/hardening/12.11_find_sgid_files.sh Executable file
View File

@ -0,0 +1,58 @@
#!/bin/bash
#
# CIS Debian 7 Hardening
# Authors : Thibault Dewailly, OVH <thibault.dewailly@corp.ovh.com>
#
#
# 12.11 Find SGID System Executables (Not Scored)
#
set -e # One error, it's over
set -u # One variable unset, it's over
# This function will be called if the script status is on enabled / audit mode
audit () {
info "Checking if there is sgid files"
RESULT=$(df --local -P | awk {'if (NR!=1) print $6'} | xargs -I '{}' find '{}' -xdev -type f -perm -2000 -print)
for BINARY in $RESULT; do
if grep -q $BINARY <<< "$EXCEPTIONS"; then
debug "$BINARY is confirmed as an exception"
RESULT=$(sed "s!$BINARY!!" <<< $RESULT)
fi
done
if [ ! -z "$RESULT" ]; then
crit "Some sgid files are present"
FORMATTED_RESULT=$(sed "s/ /\n/g" <<< $RESULT | sort | uniq | tr '\n' ' ')
crit "$FORMATTED_RESULT"
else
ok "No unknown sgid files found"
fi
}
# This function will be called if the script status is on enabled mode
apply () {
info "Removing sgid on valid binary may seriously harm your system, report only here"
}
# This function will check config parameters required
check_config() {
if [ -z "$EXCEPTIONS" ]; then
EXCEPTIONS="@"
fi
}
# Source Root Dir Parameter
if [ ! -r /etc/default/cis-hardenning ]; then
echo "There is no /etc/default/cis-hardenning file, cannot source CIS_ROOT_DIR variable, aborting"
exit 128
else
. /etc/default/cis-hardenning
if [ -z $CIS_ROOT_DIR ]; then
echo "No CIS_ROOT_DIR variable, aborting"
fi
fi
# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
[ -r $CIS_ROOT_DIR/lib/main.sh ] && . $CIS_ROOT_DIR/lib/main.sh

2
etc/conf.d/10.2_disable_system_accounts.cfg
View File

@ -1,4 +1,4 @@
# Configuration for script of same name
status=enabled
# Put here your exceptions concerning admin shells
# Put here your exceptions concerning admin accounts shells separated by spaces
EXCEPTIONS=""

4
etc/conf.d/12.11_find_sgid_files.cfg Normal file
View File

@ -0,0 +1,4 @@
# Configuration for script of same name
status=enabled
# Put here valid binaries with sgid enabled separated by spaces
EXCEPTIONS="/sbin/unix_chkpwd /usr/bin/bsd-write /usr/bin/chage /usr/bin/crontab /usr/bin/expiry /usr/bin/mutt_dotlock /usr/bin/screen /usr/bin/ssh-agent /usr/bin/wall /usr/sbin/postdrop /usr/sbin/postqueue"