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Merge pull request #30 from Samson-W/master

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Fix some bugs and apply rsyslog server
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Samson.W 2021-07-18 21:55:40 +08:00 committed by GitHub
commit 7e2bf1c5b5
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4 changed files with 32 additions and 13 deletions
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6
README.md
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@ -148,6 +148,12 @@ user.* -/var/log/user.log
``` ```
The log will be output to the file /var/log/harbian-audit.log. The log will be output to the file /var/log/harbian-audit.log.
If you apply docs/configurations/etc.iptables.rules.v4.sh to your firewall rules, and want to print the iptables log to a separate log file, insert the following lines to rsyslog.conf:
```
:msg,contains,"FW-" -/var/log/firewalllog.log
& stop
```
## After remediation (Very important) ## After remediation (Very important)
When exec --apply and set-hardening-level are set to 5 (the highest level), you need to do the following: When exec --apply and set-hardening-level are set to 5 (the highest level), you need to do the following:

3
bin/hardening/8.1.1.9_set_space_left_audit.sh
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@ -6,6 +6,7 @@
# #
# 8.1.1.9 Set space left for auditd service (Scored) # 8.1.1.9 Set space left for auditd service (Scored)
# If the value of the "space_left" keyword is set to more than 25 percent of the total partition size, this is a finding.
# Author : Samson wen, Samson <sccxboy@gmail.com> # Author : Samson wen, Samson <sccxboy@gmail.com>
# #
@ -34,7 +35,7 @@ audit () {
FNRET=3 FNRET=3
else else
SETSIZE=$(grep "^space_left.=.*" $FILE | awk '{printf $3}') SETSIZE=$(grep "^space_left.=.*" $FILE | awk '{printf $3}')
if [ "${SETSIZE}" -lt "${LEFTSIZE}" ]; then if [ "${SETSIZE}" -gt "${LEFTSIZE}" ]; then
crit "Space left value: ${SETSIZE} is more than audit log filesystem 25%" crit "Space left value: ${SETSIZE} is more than audit log filesystem 25%"
FNRET=4 FNRET=4
else else

12
bin/hardening/8.1.27_record_Events_that_modify_conf_files.sh
View File

@ -84,7 +84,11 @@ check_config() {
-a always,exit -F dir=/etc/sysconfig/ip6tables -F perm=wa -k config_file_change -a always,exit -F dir=/etc/sysconfig/ip6tables -F perm=wa -k config_file_change
-a always,exit -F dir=/etc/sysconfig/ip6tables-config -F perm=wa -k config_file_change -a always,exit -F dir=/etc/sysconfig/ip6tables-config -F perm=wa -k config_file_change
-a always,exit -F dir=/etc/sysconfig/iptables-config -F perm=wa -k config_file_change -a always,exit -F dir=/etc/sysconfig/iptables-config -F perm=wa -k config_file_change
-a always,exit -F path=/etc/sysctl.conf -F perm=wa -k config_file_change' -a always,exit -F path=/etc/sysctl.conf -F perm=wa -k config_file_change
-a always,exit -F path=/etc/rsyslog.conf -F perm=wa -k config_file_change
-a always,exit -F path=/etc/audisp/plugins.d/au-remote.conf -F perm=wa -k config_file_change
-a always,exit -F path=/etc/logrotate.conf -F perm=wa -k config_file_change
-a always,exit -F dir=/etc/logrotate.d/ -F perm=wa -k config_file_change'
# Debian # Debian
else else
AUDIT_PARAMS='-a always,exit -F path=/etc/audisp/audisp-remote.conf -F perm=wa -k config_file_change AUDIT_PARAMS='-a always,exit -F path=/etc/audisp/audisp-remote.conf -F perm=wa -k config_file_change
@ -99,7 +103,11 @@ check_config() {
-a always,exit -F dir=/etc/profile.d/ -F perm=wa -k config_file_change -a always,exit -F dir=/etc/profile.d/ -F perm=wa -k config_file_change
-a always,exit -F dir=/etc/security/ -F perm=wa -k config_file_change -a always,exit -F dir=/etc/security/ -F perm=wa -k config_file_change
-a always,exit -F dir=/etc/iptables/ -F perm=wa -k config_file_change -a always,exit -F dir=/etc/iptables/ -F perm=wa -k config_file_change
-a always,exit -F path=/etc/sysctl.conf -F perm=wa -k config_file_change' -a always,exit -F path=/etc/sysctl.conf -F perm=wa -k config_file_change
-a always,exit -F path=/etc/rsyslog.conf -F perm=wa -k config_file_change
-a always,exit -F path=/etc/audisp/plugins.d/au-remote.conf -F perm=wa -k config_file_change
-a always,exit -F path=/etc/logrotate.conf -F perm=wa -k config_file_change
-a always,exit -F dir=/etc/logrotate.d/ -F perm=wa -k config_file_change'
fi fi
} }

24
docs/configurations/etc.iptables.rules.v4.sh
View File

@ -43,18 +43,18 @@ $IPT -A INPUT -p icmp -m state --state ESTABLISHED -j ACCEPT
$IPT -A INPUT -p icmp -m state --state RELATED -j ACCEPT $IPT -A INPUT -p icmp -m state --state RELATED -j ACCEPT
$IPT -A INPUT -m limit --limit 3/min -j LOG --log-prefix "SFW2-IN-ILL-TARGET " --log-tcp-options --log-ip-options $IPT -A INPUT -m limit --limit 3/min -j LOG --log-prefix "FW-SFW2-IN-ILL-TARGET " --log-tcp-options --log-ip-options
$IPT -A FORWARD -m physdev --physdev-is-bridged -j ACCEPT $IPT -A FORWARD -m physdev --physdev-is-bridged -j ACCEPT
$IPT -A FORWARD -m limit --limit 3/min -j LOG --log-prefix "SFW2-FWD-ILL-ROUTING " --log-tcp-options --log-ip-options $IPT -A FORWARD -m limit --limit 3/min -j LOG --log-prefix "FW-SFW2-FWD-ILL-ROUTING " --log-tcp-options --log-ip-options
for PUB_IF in $PUB_IFS for PUB_IF in $PUB_IFS
do do
# sync # sync
$IPT -A INPUT -i ${PUB_IF} -p tcp ! --syn -m state --state NEW -m limit --limit 5/m --limit-burst 7 -j LOG --log-level 4 --log-prefix "Drop Syn" $IPT -A INPUT -i ${PUB_IF} -p tcp ! --syn -m state --state NEW -m limit --limit 5/m --limit-burst 7 -j LOG --log-level 4 --log-prefix "FW-Drop-Syn "
$IPT -A INPUT -i ${PUB_IF} -p tcp ! --syn -m state --state NEW -j DROP $IPT -A INPUT -i ${PUB_IF} -p tcp ! --syn -m state --state NEW -j DROP
# Fragments # Fragments
$IPT -A INPUT -i ${PUB_IF} -f -m limit --limit 5/m --limit-burst 7 -j LOG --log-level 4 --log-prefix "Fragments Packets" $IPT -A INPUT -i ${PUB_IF} -f -m limit --limit 5/m --limit-burst 7 -j LOG --log-level 4 --log-prefix "FW-Fragments Packets "
$IPT -A INPUT -i ${PUB_IF} -f -j DROP $IPT -A INPUT -i ${PUB_IF} -f -j DROP
@ -62,15 +62,15 @@ do
$IPT -A INPUT -i ${PUB_IF} -p tcp --tcp-flags ALL FIN,URG,PSH -j DROP $IPT -A INPUT -i ${PUB_IF} -p tcp --tcp-flags ALL FIN,URG,PSH -j DROP
$IPT -A INPUT -i ${PUB_IF} -p tcp --tcp-flags ALL ALL -j DROP $IPT -A INPUT -i ${PUB_IF} -p tcp --tcp-flags ALL ALL -j DROP
$IPT -A INPUT -i ${PUB_IF} -p tcp --tcp-flags ALL NONE -m limit --limit 5/m --limit-burst 7 -j LOG --log-level 4 --log-prefix "NULL Packets" $IPT -A INPUT -i ${PUB_IF} -p tcp --tcp-flags ALL NONE -m limit --limit 5/m --limit-burst 7 -j LOG --log-level 4 --log-prefix "FW-NULL Packets "
$IPT -A INPUT -i ${PUB_IF} -p tcp --tcp-flags ALL NONE -j DROP # NULL packets $IPT -A INPUT -i ${PUB_IF} -p tcp --tcp-flags ALL NONE -j DROP # NULL packets
$IPT -A INPUT -i ${PUB_IF} -p tcp --tcp-flags SYN,RST SYN,RST -j DROP $IPT -A INPUT -i ${PUB_IF} -p tcp --tcp-flags SYN,RST SYN,RST -j DROP
$IPT -A INPUT -i ${PUB_IF} -p tcp --tcp-flags SYN,FIN SYN,FIN -m limit --limit 5/m --limit-burst 7 -j LOG --log-level 4 --log-prefix "XMAS Packets" $IPT -A INPUT -i ${PUB_IF} -p tcp --tcp-flags SYN,FIN SYN,FIN -m limit --limit 5/m --limit-burst 7 -j LOG --log-level 4 --log-prefix "FW-XMAS Packets "
$IPT -A INPUT -i ${PUB_IF} -p tcp --tcp-flags SYN,FIN SYN,FIN -j DROP #XMAS $IPT -A INPUT -i ${PUB_IF} -p tcp --tcp-flags SYN,FIN SYN,FIN -j DROP #XMAS
$IPT -A INPUT -i ${PUB_IF} -p tcp --tcp-flags FIN,ACK FIN -m limit --limit 5/m --limit-burst 7 -j LOG --log-level 4 --log-prefix "Fin Packets Scan" $IPT -A INPUT -i ${PUB_IF} -p tcp --tcp-flags FIN,ACK FIN -m limit --limit 5/m --limit-burst 7 -j LOG --log-level 4 --log-prefix "FW-Fin Packets Scan "
$IPT -A INPUT -i ${PUB_IF} -p tcp --tcp-flags FIN,ACK FIN -j DROP # FIN packet scans $IPT -A INPUT -i ${PUB_IF} -p tcp --tcp-flags FIN,ACK FIN -j DROP # FIN packet scans
$IPT -A INPUT -i ${PUB_IF} -p tcp --tcp-flags ALL SYN,RST,ACK,FIN,URG -j DROP $IPT -A INPUT -i ${PUB_IF} -p tcp --tcp-flags ALL SYN,RST,ACK,FIN,URG -j DROP
@ -91,19 +91,23 @@ do
$IPT -A INPUT -p udp --dport 68 -m state --state NEW -j ACCEPT $IPT -A INPUT -p udp --dport 68 -m state --state NEW -j ACCEPT
# $IPT -A INPUT -p tcp --dport 80 -m state --state NEW -j ACCEPT # $IPT -A INPUT -p tcp --dport 80 -m state --state NEW -j ACCEPT
# $IPT -A INPUT -p tcp --dport 443 -m state --state NEW -j ACCEPT # $IPT -A INPUT -p tcp --dport 443 -m state --state NEW -j ACCEPT
# allow rsyslog and audit remote server
#$IPT -A INPUT -p tcp --dport 514 -m state --state NEW -j ACCEPT
#$IPT -A INPUT -p udp --dport 60 -m state --state NEW -j ACCEPT
# allow incoming ICMP ping pong stuff # allow incoming ICMP ping pong stuff
$IPT -A INPUT -p icmp --icmp-type 8 -m state --state NEW,ESTABLISHED,RELATED -j ACCEPT $IPT -A INPUT -p icmp --icmp-type 8 -m state --state NEW,ESTABLISHED,RELATED -j ACCEPT
$IPT -A OUTPUT -p icmp --icmp-type 0 -m state --state ESTABLISHED,RELATED -j ACCEPT $IPT -A OUTPUT -p icmp --icmp-type 0 -m state --state ESTABLISHED,RELATED -j ACCEPT
# prevent ssh brute force attack # prevent ssh brute force attack
$IPT -A LOGDROP -j LOG $IPT -A LOGDROP -j LOG --log-prefix "FW-LOGDROP "
$IPT -A LOGDROP -j DROP $IPT -A LOGDROP -j DROP
# Log everything else # Log everything else
# *** Required for psad **** # *** Required for psad ****
$IPT -A INPUT -j LOG $IPT -A INPUT -j LOG --log-prefix "FW-INPUT "
$IPT -A FORWARD -j LOG $IPT -A FORWARD -j LOG --log-prefix "FW-FORWARD "
$IPT -A INPUT -j DROP $IPT -A INPUT -j DROP
exit 0 exit 0