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allow multiple users in 5.2.18 (#228)
* allow multiple exception users for 99.5.2.4 * move clean up part of previous commit * split clean up part of previous commit * add tests for multiple allowed and denied ssh users * fix script to correctly set multiple allowed and denied ssh users * add cleanup resolved check to 5.2.18 * apply shellfmt to 5.2.18 --------- Co-authored-by: GoldenKiwi <thibault.dewailly@corp.ovh.com>
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lgaida
GitHub
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@ -22,13 +22,13 @@ FILE='/etc/ssh/sshd_config'
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# This function will be called if the script status is on enabled / audit mode
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audit() {
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OPTIONS="AllowUsers='$ALLOWED_USERS' AllowGroups='$ALLOWED_GROUPS' DenyUsers='$DENIED_USERS' DenyGroups='$DENIED_GROUPS'"
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OPTIONS=("AllowUsers='$ALLOWED_USERS'" "AllowGroups='$ALLOWED_GROUPS'" "DenyUsers='$DENIED_USERS'" "DenyGroups='$DENIED_GROUPS'")
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is_pkg_installed "$PACKAGE"
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if [ "$FNRET" != 0 ]; then
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ok "$PACKAGE is not installed!"
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else
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ok "$PACKAGE is installed"
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for SSH_OPTION in $OPTIONS; do
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for SSH_OPTION in "${OPTIONS[@]}"; do
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SSH_PARAM=$(echo "$SSH_OPTION" | cut -d= -f 1)
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SSH_VALUE=$(echo "$SSH_OPTION" | cut -d= -f 2)
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# shellcheck disable=SC2001
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@ -53,7 +53,7 @@ apply() {
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crit "$PACKAGE is absent, installing it"
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apt_install "$PACKAGE"
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fi
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for SSH_OPTION in $OPTIONS; do
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for SSH_OPTION in "${OPTIONS[@]}"; do
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SSH_PARAM=$(echo "$SSH_OPTION" | cut -d= -f 1)
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SSH_VALUE=$(echo "$SSH_OPTION" | cut -d= -f 2)
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# shellcheck disable=SC2001
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@ -22,4 +22,109 @@ test_audit() {
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register_test contain "^DenyUsers[[:space:]]*nobody is present in /etc/ssh/sshd_config"
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register_test contain "^DenyGroups[[:space:]]*nobody is present in /etc/ssh/sshd_config"
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run resolved "${CIS_CHECKS_DIR}/${script}.sh" --audit-all
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describe Check and report mismatch for allowed user
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useradd -s /bin/bash johnallow
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sed -i "s/ALLOWED_USERS=''/ALLOWED_USERS='johnallow'/" "${CIS_CONF_DIR}/conf.d/${script}.cfg"
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register_test retvalshouldbe 1
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register_test contain "^AllowUsers[[:space:]]*johnallow is not present in /etc/ssh/sshd_config"
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register_test contain "^AllowGroups[[:space:]]** is present in /etc/ssh/sshd_config"
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register_test contain "^DenyUsers[[:space:]]*nobody is present in /etc/ssh/sshd_config"
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register_test contain "^DenyGroups[[:space:]]*nobody is present in /etc/ssh/sshd_config"
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run allowed_user_mismatch "${CIS_CHECKS_DIR}/${script}.sh" --audit-all
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describe Correctly apply allowed user
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# the previous test checked that ALLOWED_USERS is set but not correctly applied in sshd_config so we apply it now
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"${CIS_CHECKS_DIR}/${script}.sh" || true
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# and check again that the fix was correctly applied
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register_test retvalshouldbe 0
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register_test contain "^AllowUsers[[:space:]]*johnallow is present in /etc/ssh/sshd_config"
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register_test contain "^AllowGroups[[:space:]]** is present in /etc/ssh/sshd_config"
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register_test contain "^DenyUsers[[:space:]]*nobody is present in /etc/ssh/sshd_config"
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register_test contain "^DenyGroups[[:space:]]*nobody is present in /etc/ssh/sshd_config"
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run fix_user_mismatch "${CIS_CHECKS_DIR}/${script}.sh" --apply-all
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describe Check and report mismatch for multiple allowed users
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useradd -s /bin/bash janeallow
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sed -i "s/johnallow/johnallow janeallow/" "${CIS_CONF_DIR}/conf.d/${script}.cfg"
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register_test retvalshouldbe 1
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register_test contain "^AllowUsers[[:space:]]*johnallow janeallow is not present in /etc/ssh/sshd_config"
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register_test contain "^AllowGroups[[:space:]]** is present in /etc/ssh/sshd_config"
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register_test contain "^DenyUsers[[:space:]]*nobody is present in /etc/ssh/sshd_config"
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register_test contain "^DenyGroups[[:space:]]*nobody is present in /etc/ssh/sshd_config"
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run multi_allowed_user_mismatch "${CIS_CHECKS_DIR}/${script}.sh" --audit-all
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describe Correctly apply multiple allowed users
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# the previous test checked that ALLOWED_USERS is set but not correctly applied in sshd_config so we apply it now
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"${CIS_CHECKS_DIR}/${script}.sh" || true
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# and check again that the fix was correctly applied
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tail -n 5 /etc/ssh/sshd_config
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register_test retvalshouldbe 0
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register_test contain "^AllowUsers[[:space:]]*johnallow janeallow is present in /etc/ssh/sshd_config"
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register_test contain "^AllowGroups[[:space:]]** is present in /etc/ssh/sshd_config"
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register_test contain "^DenyUsers[[:space:]]*nobody is present in /etc/ssh/sshd_config"
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register_test contain "^DenyGroups[[:space:]]*nobody is present in /etc/ssh/sshd_config"
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run fix_multi_allowed_user_mismatch "${CIS_CHECKS_DIR}/${script}.sh" --audit-all
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# reset allowed users to default before continuing
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sed -i "s/ALLOWED_USERS='johnallow janeallow'/ALLOWED_USERS=''/" "${CIS_CONF_DIR}/conf.d/${script}.cfg"
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describe Check and report mismatch for denied user
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useradd -s /bin/bash peterdeny
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sed -i "s/DENIED_USERS=''/DENIED_USERS='peterdeny'/" "${CIS_CONF_DIR}/conf.d/${script}.cfg"
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register_test retvalshouldbe 1
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register_test contain "^AllowUsers[[:space:]]** is present in /etc/ssh/sshd_config"
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register_test contain "^AllowGroups[[:space:]]** is present in /etc/ssh/sshd_config"
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register_test contain "^DenyUsers[[:space:]]*peterdeny is not present in /etc/ssh/sshd_config"
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register_test contain "^DenyGroups[[:space:]]*nobody is present in /etc/ssh/sshd_config"
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run denied_user_mismatch "${CIS_CHECKS_DIR}/${script}.sh" --audit-all
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describe Correctly apply denied user
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# the previous test checked that DENIED_USERS is set but not correctly applied in sshd_config so we apply it now
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"${CIS_CHECKS_DIR}/${script}.sh" || true
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# and check again that the fix was correctly applied
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register_test retvalshouldbe 0
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register_test contain "^AllowUsers[[:space:]]** is present in /etc/ssh/sshd_config"
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register_test contain "^AllowGroups[[:space:]]** is present in /etc/ssh/sshd_config"
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register_test contain "^DenyUsers[[:space:]]*peterdeny is present in /etc/ssh/sshd_config"
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register_test contain "^DenyGroups[[:space:]]*nobody is present in /etc/ssh/sshd_config"
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run fix_denied_user_mismatch "${CIS_CHECKS_DIR}/${script}.sh" --apply-all
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describe Check and report mismatch for multiple denied users
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useradd -s /bin/bash marrydeny
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sed -i "s/peterdeny/peterdeny marrydeny/" "${CIS_CONF_DIR}/conf.d/${script}.cfg"
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register_test retvalshouldbe 1
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register_test contain "^AllowUsers[[:space:]]** is present in /etc/ssh/sshd_config"
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register_test contain "^AllowGroups[[:space:]]** is present in /etc/ssh/sshd_config"
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register_test contain "^DenyUsers[[:space:]]*peterdeny marrydeny is not present in /etc/ssh/sshd_config"
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register_test contain "^DenyGroups[[:space:]]*nobody is present in /etc/ssh/sshd_config"
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run multi_denied_user_mismatch "${CIS_CHECKS_DIR}/${script}.sh" --audit-all
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describe Correctly apply multiple denied users
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# the previous test checked that DENIED_USERS is set but not correctly applied in sshd_config so we apply it now
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"${CIS_CHECKS_DIR}/${script}.sh" || true
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# and check again that the fix was correctly applied
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register_test retvalshouldbe 0
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register_test contain "^AllowUsers[[:space:]]** is present in /etc/ssh/sshd_config"
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register_test contain "^AllowGroups[[:space:]]** is present in /etc/ssh/sshd_config"
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register_test contain "^DenyUsers[[:space:]]*peterdeny marrydeny is present in /etc/ssh/sshd_config"
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register_test contain "^DenyGroups[[:space:]]*nobody is present in /etc/ssh/sshd_config"
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run fix_multi_denied_user_mismatch "${CIS_CHECKS_DIR}/${script}.sh" --audit-all
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# reset to prevent other test from possibly failing in the future
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sed -i "s/DENIED_USERS='peterdeny marrydeny'/DENIED_USERS=''/" "${CIS_CONF_DIR}/conf.d/${script}.cfg"
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"${CIS_CHECKS_DIR}/${script}.sh" || true
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describe Checking resolved state
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register_test retvalshouldbe 0
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register_test contain "^AllowUsers[[:space:]]** is present in /etc/ssh/sshd_config"
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register_test contain "^AllowGroups[[:space:]]** is present in /etc/ssh/sshd_config"
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register_test contain "^DenyUsers[[:space:]]*nobody is present in /etc/ssh/sshd_config"
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register_test contain "^DenyGroups[[:space:]]*nobody is present in /etc/ssh/sshd_config"
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run cleanup_resolved "${CIS_CHECKS_DIR}/${script}.sh" --audit-all
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# Cleanup
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userdel johnallow
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userdel janeallow
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userdel peterdeny
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userdel marrydeny
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}
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