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Accept lower values (#95)

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* IMP(5.2.23): accept lower value as valid

* IMP(5.2.7): accept lower value as valid
This commit is contained in:
Thibault Ayanides 2021-04-27 16:04:13 +02:00 committed by GitHub
parent 1cade2e375
commit 9e6c9a0d8a
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GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 69 additions and 7 deletions
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21
bin/hardening/5.2.23_limit_ssh_max_sessions.sh
View File

@ -36,7 +36,17 @@ audit() {
if [ "$FNRET" = 0 ]; then
ok "$PATTERN is present in $FILE"
else
crit "$PATTERN is not present in $FILE"
does_pattern_exist_in_file_nocase "$FILE" "^${SSH_PARAM}"
if [ "$FNRET" != 0 ]; then
crit "$PATTERN is not present in $FILE"
else
VALUE=$($SUDO_CMD grep -i "^${SSH_PARAM}" "$FILE" | tr -s ' ' | cut -d' ' -f2)
if [ "$VALUE" -gt "$SSH_VALUE" ]; then
crit "$VALUE is higher than recommended $SSH_VALUE for $SSH_PARAM"
else
ok "$VALUE is lower than recommended $SSH_VALUE for $SSH_PARAM"
fi
fi
fi
done
fi
@ -64,8 +74,13 @@ apply() {
if [ "$FNRET" != 0 ]; then
add_end_of_file "$FILE" "$SSH_PARAM $SSH_VALUE"
else
info "Parameter $SSH_PARAM is present but with the wrong value -- Fixing"
replace_in_file "$FILE" "^${SSH_PARAM}[[:space:]]*.*" "$SSH_PARAM $SSH_VALUE"
VALUE=$(grep -i "^${SSH_PARAM}" "$FILE" | tr -s ' ' | cut -d' ' -f2)
if [ "$VALUE" -gt "$SSH_VALUE" ]; then
warn "$VALUE is higher than recommended $SSH_VALUE for $SSH_PARAM, replacing it"
replace_in_file "$FILE" "^${SSH_PARAM}[[:space:]]*.*" "$SSH_PARAM $SSH_VALUE"
else
ok "$VALUE is lower than recommended $SSH_VALUE for $SSH_PARAM"
fi
fi
/etc/init.d/ssh reload
fi

23
bin/hardening/5.2.7_sshd_maxauthtries.sh
View File

@ -36,7 +36,17 @@ audit() {
if [ "$FNRET" = 0 ]; then
ok "$PATTERN is present in $FILE"
else
crit "$PATTERN is not present in $FILE"
does_pattern_exist_in_file_nocase "$FILE" "^${SSH_PARAM}"
if [ "$FNRET" != 0 ]; then
crit "$PATTERN is not present in $FILE"
else
VALUE=$($SUDO_CMD grep -i "^${SSH_PARAM}" "$FILE" | tr -s ' ' | cut -d' ' -f2)
if [ "$VALUE" -gt "$SSH_VALUE" ]; then
crit "$VALUE is higher than recommended $SSH_VALUE for $SSH_PARAM"
else
ok "$VALUE is lower than recommended $SSH_VALUE for $SSH_PARAM"
fi
fi
fi
done
fi
@ -59,13 +69,18 @@ apply() {
if [ "$FNRET" = 0 ]; then
ok "$PATTERN is present in $FILE"
else
warn "$PATTERN is not present in $FILE, adding it"
warn "$PATTERN is not present in $FILE"
does_pattern_exist_in_file_nocase "$FILE" "^${SSH_PARAM}"
if [ "$FNRET" != 0 ]; then
add_end_of_file "$FILE" "$SSH_PARAM $SSH_VALUE"
else
info "Parameter $SSH_PARAM is present but with the wrong value -- Fixing"
replace_in_file "$FILE" "^${SSH_PARAM}[[:space:]]*.*" "$SSH_PARAM $SSH_VALUE"
VALUE=$(grep -i "^${SSH_PARAM}" "$FILE" | tr -s ' ' | cut -d' ' -f2)
if [ "$VALUE" -gt "$SSH_VALUE" ]; then
warn "$VALUE is higher than recommended $SSH_VALUE for $SSH_PARAM, replacing it"
replace_in_file "$FILE" "^${SSH_PARAM}[[:space:]]*.*" "$SSH_PARAM $SSH_VALUE"
else
ok "$VALUE is lower than recommended $SSH_VALUE for $SSH_PARAM"
fi
fi
/etc/init.d/ssh reload
fi

16
tests/hardening/5.2.23_limit_ssh_max_sessions.sh
View File

@ -7,6 +7,22 @@ test_audit() {
# shellcheck disable=2154
run blank /opt/debian-cis/bin/hardening/"${script}".sh --audit-all
echo "maxsessions 1" >>/etc/ssh/sshd_config
describe Running restrictive
register_test retvalshouldbe 0
register_test contain "[ OK ] 1 is lower than recommended 10"
run restrictive /opt/debian-cis/bin/hardening/"${script}".sh --audit-all
# delete last line
sed -i '$ d' /etc/ssh/sshd_config
echo "maxsessions 15" >>/etc/ssh/sshd_config
describe Running too permissive
register_test retvalshouldbe 1
register_test contain "[ KO ] 15 is higher than recommended 10"
run permissive /opt/debian-cis/bin/hardening/"${script}".sh --audit-all
describe Correcting situation
# `apply` performs a service reload after each change in the config file
# the service needs to be started for the reload to succeed

16
tests/hardening/5.2.7_sshd_maxauthtries.sh
View File

@ -7,6 +7,22 @@ test_audit() {
# shellcheck disable=2154
run blank /opt/debian-cis/bin/hardening/"${script}".sh --audit-all
echo "MaxAuthTries 2" >>/etc/ssh/sshd_config
describe Running restrictive
register_test retvalshouldbe 0
register_test contain "[ OK ] 2 is lower than recommended 4"
run restrictive /opt/debian-cis/bin/hardening/"${script}".sh --audit-all
# delete last line
sed -i '$ d' /etc/ssh/sshd_config
echo "MaxAuthTries 6" >>/etc/ssh/sshd_config
describe Running too permissive
register_test retvalshouldbe 1
register_test contain "[ KO ] 6 is higher than recommended 4"
run permissive /opt/debian-cis/bin/hardening/"${script}".sh --audit-all
describe Correcting situation
# `apply` performs a service reload after each change in the config file
# the service needs to be started for the reload to succeed