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Add is_ipv6_disabled (#57)

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Modify some checks to make it pass when ipv6 is diabled

fix #50

	modified:   bin/hardening/3.1.1_disable_ipv6.sh
	modified:   bin/hardening/3.3.1_disable_source_routed_packets.sh
	modified:   bin/hardening/3.3.9_disable_ipv6_router_advertisement.sh
	modified:   lib/utils.sh

Co-authored-by: GoldenKiwi <thibault.dewailly@corp.ovh.com>
This commit is contained in:
Thibault Ayanides 2021-02-17 11:45:20 +01:00 committed by GitHub
parent 6ab1cab3ce
commit d1b371f410
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 36 additions and 24 deletions
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18
bin/hardening/3.1.1_disable_ipv6.sh
View File

@ -21,29 +21,17 @@ SYSCTL_PARAMS='net.ipv6.conf.all.disable_ipv6=1 net.ipv6.conf.default.disable_ip
# This function will be called if the script status is on enabled / audit mode
audit() {
does_sysctl_param_exists "net.ipv6"
is_ipv6_enabled
if [ "$FNRET" != 0 ]; then
ok "ipv6 is disabled"
else
for SYSCTL_VALUES in $SYSCTL_PARAMS; do
SYSCTL_PARAM=$(echo "$SYSCTL_VALUES" | cut -d= -f 1)
SYSCTL_EXP_RESULT=$(echo "$SYSCTL_VALUES" | cut -d= -f 2)
debug "$SYSCTL_PARAM should be set to $SYSCTL_EXP_RESULT"
has_sysctl_param_expected_result "$SYSCTL_PARAM" "$SYSCTL_EXP_RESULT"
if [ "$FNRET" != 0 ]; then
crit "$SYSCTL_PARAM was not set to $SYSCTL_EXP_RESULT"
elif [ "$FNRET" = 255 ]; then
warn "$SYSCTL_PARAM does not exist -- Typo?"
else
ok "$SYSCTL_PARAM correctly set to $SYSCTL_EXP_RESULT"
fi
done
crit "ipv6 is enabled"
fi
}
# This function will be called if the script status is on enabled mode
apply() {
does_sysctl_param_exists "net.ipv6"
is_ipv6_enabled
if [ "$FNRET" != 0 ]; then
ok "ipv6 is disabled"
else

2
bin/hardening/3.3.1_disable_source_routed_packets.sh
View File

@ -22,7 +22,7 @@ SYSCTL_PARAMS=''
# This function will be called if the script status is on enabled / audit mode
audit() {
for SYSCTL_VALUES in $SYSCTL_PARAMS; do
does_sysctl_param_exists "net.ipv6"
is_ipv6_enabled
if [ "$FNRET" = 0 ] || [[ ! "$SYSCTL_VALUES" =~ .*ipv6.* ]]; then # IPv6 is enabled or SYSCTL_VALUES doesn't contain ipv6
SYSCTL_PARAM=$(echo "$SYSCTL_VALUES" | cut -d= -f 1)
SYSCTL_EXP_RESULT=$(echo "$SYSCTL_VALUES" | cut -d= -f 2)

16
bin/hardening/3.3.9_disable_ipv6_router_advertisement.sh
View File

@ -21,10 +21,8 @@ SYSCTL_PARAMS='net.ipv6.conf.all.accept_ra=0 net.ipv6.conf.default.accept_ra=0'
# This function will be called if the script status is on enabled / audit mode
audit() {
does_sysctl_param_exists "net.ipv6"
if [ "$FNRET" != 0 ]; then
ok "ipv6 is disabled"
else
is_ipv6_enabled
if [ "$FNRET" = 0 ]; then
for SYSCTL_VALUES in $SYSCTL_PARAMS; do
SYSCTL_PARAM=$(echo "$SYSCTL_VALUES" | cut -d= -f 1)
SYSCTL_EXP_RESULT=$(echo "$SYSCTL_VALUES" | cut -d= -f 2)
@ -38,15 +36,15 @@ audit() {
ok "$SYSCTL_PARAM correctly set to $SYSCTL_EXP_RESULT"
fi
done
else
ok "ipv6 disabled"
fi
}
# This function will be called if the script status is on enabled mode
apply() {
does_sysctl_param_exists "net.ipv6"
if [ "$FNRET" != 0 ]; then
ok "ipv6 is disabled"
else
is_ipv6_enabled
if [ "$FNRET" = 0 ]; then
for SYSCTL_VALUES in $SYSCTL_PARAMS; do
SYSCTL_PARAM=$(echo "$SYSCTL_VALUES" | cut -d= -f 1)
SYSCTL_EXP_RESULT=$(echo "$SYSCTL_VALUES" | cut -d= -f 2)
@ -62,6 +60,8 @@ apply() {
ok "$SYSCTL_PARAM correctly set to $SYSCTL_EXP_RESULT"
fi
done
else
ok "ipv6 disabled"
fi
}

24
lib/utils.sh
View File

@ -46,6 +46,30 @@ set_sysctl_param() {
fi
}
#
# IPV6
#
is_ipv6_enabled() {
SYSCTL_PARAMS='net.ipv6.conf.all.disable_ipv6=1 net.ipv6.conf.default.disable_ipv6=1 net.ipv6.conf.lo.disable_ipv6=1'
does_sysctl_param_exists "net.ipv6"
local ENABLE=1
if [ "$FNRET" = 0 ]; then
for SYSCTL_VALUES in $SYSCTL_PARAMS; do
SYSCTL_PARAM=$(echo "$SYSCTL_VALUES" | cut -d= -f 1)
SYSCTL_EXP_RESULT=$(echo "$SYSCTL_VALUES" | cut -d= -f 2)
debug "$SYSCTL_PARAM should be set to $SYSCTL_EXP_RESULT"
has_sysctl_param_expected_result "$SYSCTL_PARAM" "$SYSCTL_EXP_RESULT"
if [ "$FNRET" != 0 ]; then
crit "$SYSCTL_PARAM was not set to $SYSCTL_EXP_RESULT"
ENABLE=0
fi
done
fi
FNRET=$ENABLE
}
#
# Dmesg
#