linux自动化安全基线脚本-ITB运维部落—http://www.itbcn.cn—ITB运维技术交流之家平台
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linux自动化安全基线脚本

前言:

由于没有相关自动化安全基线检查设备,自己写了个自动化基线检查脚本,由于各行各业的基线不一样,本脚步仅供参考

脚本功能说明:

检测密码设置策略的口令生存期是否符合规范
检测密码设置策略的口令更改最小间隔天数是否符合规范
检测密码设置策略的口令最小长度是否符合规范
检测密码设置策略的口令过期前警告天数是否符合规范
检测是否设置帐号超时自动注销
检测是否设置系统引导管理器密码
检测是否存在空口令账号
检查是否存在除root之外UID为0的用户
检查用户umask设置是否符合规范
检查重要目录或文件权限是否符合规范
检查系统core dump是否符合规范
检测是否禁止root用户远程登录
检查系统openssh安全配置,禁止使用协议1
检测保留历史命令的条数
检测重要文件是否设置不可修改
检测snmp团体字设置不能使用默认的团体字
检测是否关闭关闭系统信任主机
检测是否日志审核配置
检测系统磁盘分区是否有足够的剩余空间
脚本代码:

#!/bin/bash
#version 1.0
#author by 网服务
cat <<EOF
*************************************************************************************
***** linux基线检查脚本       *****
*************************************************************************************
***** linux基线配置规范设计 *****
***** 输出结果out.txt *****
*************************************************************************************
EOF
echo “***************************”
echo “账号策略检查中…”
echo “***************************”
passmax=`cat /etc/login.defs | grep PASS_MAX_DAYS | grep -v ^# | awk ‘{print $2}’`
passmin=`cat /etc/login.defs | grep PASS_MIN_DAYS | grep -v ^# | awk ‘{print $2}’`
passlen=`cat /etc/login.defs | grep PASS_MIN_LEN | grep -v ^# | awk ‘{print $2}’`
passage=`cat /etc/login.defs | grep PASS_WARN_AGE | grep -v ^# | awk ‘{print $2}’`
if [ $passmax -le 90 -a $passmax -gt 0];then
echo “口令生存周期为${passmax}天,符合要求” >> out.txt
else
echo “口令生存周期为${passmax}天,不符合要求,建议设置不大于90天” >> out.txt
fi
if [ $passmin -ge 6 ];then
echo “口令更改最小时间间隔为${passmin}天,符合要求” >> out.txt
else
echo “口令更改最小时间间隔为${passmin}天,不符合要求,建议设置大于等于6天” >> out.txt
fi
if [ $passlen -ge 8 ];then
echo “口令最小长度为${passlen},符合要求” >> out.txt
else
echo “口令最小长度为${passlen},不符合要求,建议设置最小长度大于等于8” >> out.txt
fi
if [ $passage -ge 30 -a $passage -lt $passmax ];then
echo “口令过期警告时间天数为${passage},符合要求” >> out.txt
else
echo “口令过期警告时间天数为${passage},不符合要求,建议设置大于等于30并小于口令生存周期” >> out.txt
fi
echo “***************************”
echo “账号是否会主动注销检查中…”
echo “***************************”
cat /etc/profile | grep TMOUT | awk -F[=] ‘{print $2}’
if [ $? -eq 0 ];then
TMOUT=`cat /etc/profile | grep TMOUT | awk -F[=] ‘{print $2}’`
if [ $TMOUT -le 600 -a $TMOUT -ge 10 ];then
echo “账号超时时间${TMOUT}秒,符合要求” >> out.txt
else
echo “账号超时时间${TMOUT}秒,不符合要求,建议设置小于600秒” >> out.txt
fi
else
echo “账号超时不存在自动注销,不符合要求,建议设置小于600秒” >> out.txt
fi
#grub和lilo密码是否设置检查
cat /etc/grub.conf | grep password 2> /dev/null
if [ $? -eq 0 ];then
echo “已设置grub密码,符合要求” >> out.txt
else
echo “没有设置grub密码,不符合要求,建议设置grub密码” >> out.txt
fi
cat /etc/lilo.conf | grep password 2> /dev/null
if [ $? -eq 0 ];then
echo “已设置lilo密码,符合要求” >> out.txt
else
echo “没有设置lilo密码,不符合要求,建议设置lilo密码” >> out.txt
fi
#查找非root账号UID为0的账号
UIDS=`awk -F[:] ‘NR!=1{print $3}’ /etc/passwd`
flag=0
for i in $UIDS
do
if [ $i = 0 ];then
echo “存在非root账号的账号UID为0,不符合要求” >> out.txt
else
flag=1
fi
done
if [ $flag = 1 ];then
echo “不存在非root账号的账号UID为0,符合要求” >> out.txt
fi
#检查umask设置
umask1=`cat /etc/profile | grep umask | grep -v ^# | awk ‘{print $2}’`
umask2=`cat /etc/csh.cshrc | grep umask | grep -v ^# | awk ‘{print $2}’`
umask3=`cat /etc/bashrc | grep umask | grep -v ^# | awk ‘NR!=1{print $2}’`
flags=0
for i in $umask1
do
if [ $i = “027” ];then
echo “/etc/profile文件中所设置的umask为${i},符合要求” >> out.txt
else
flags=1
fi
done
if [ $flags = 1 ];then
echo “/etc/profile文件中所所设置的umask为${i},不符合要求,建议设置为027” >> out.txt
fi
flags=0
for i in $umask2
do
if [ $i = “027” ];then
echo “/etc/csh.cshrc文件中所设置的umask为${i},符合要求” >> out.txt
else
flags=1
fi
done
if [ $flags = 1 ];then
echo “/etc/csh.cshrc文件中所所设置的umask为${i},不符合要求,建议设置为027” >> out.txt
fi
flags=0
for i in $umask3
do
if [ $i = “027” ];then
echo “/etc/bashrc文件中所设置的umask为${i},符合要求” >> out.txt
else
flags=1
fi
done
if [ $flags = 1 ];then
echo “/etc/bashrc文件中所设置的umask为${i},不符合要求,建议设置为027” >> out.txt
fi
echo “***************************”
echo “检查重要文件权限中…”
echo “***************************”
file1=`ls -l /etc/passwd | awk ‘{print $1}’`
file2=`ls -l /etc/shadow | awk ‘{print $1}’`
file3=`ls -l /etc/group | awk ‘{print $1}’`
file4=`ls -l /etc/securetty | awk ‘{print $1}’`
file5=`ls -l /etc/services | awk ‘{print $1}’`
file6=`ls -l /etc/xinetd.conf | awk ‘{print $1}’`
file7=`ls -l /etc/grub.conf | awk ‘{print $1}’`
file8=`ls -l /etc/lilo.conf | awk ‘{print $1}’`
if [ $file1 = “-rw-r–r–” ];then
echo “/etc/passwd文件权限为644,符合要求” >> out.txt
else
echo “/etc/passwd文件权限不为644,不符合要求,建议设置权限为644” >> out.txt
fi
if [ $file2 = “-r——–” ];then
echo “/etc/shadow文件权限为400,符合要求” >> out.txt
else
echo “/etc/shadow文件权限不为400,不符合要求,建议设置权限为400” >> out.txt
fi
if [ $file3 = “-rw-r–r–” ];then
echo “/etc/group文件权限为644,符合要求” >> out.txt
else
echo “/etc/group文件权限不为644,不符合要求,建议设置权限为644” >> out.txt
fi
if [ $file4 = “-rw——-” ];then
echo “/etc/security文件权限为600,符合要求” >> out.txt
else
echo “/etc/security文件权限不为600,不符合要求,建议设置权限为600” >> out.txt
fi
if [ $file5 = “-rw-r–r–” ];then
echo “/etc/services文件权限为644,符合要求” >> out.txt
else
echo “/etc/services文件权限不为644,不符合要求,建议设置权限为644” >> out.txt
fi
if [ $file6 = “-rw——-” ];then
echo “/etc/xinetd.conf文件权限为600,符合要求” >> out.txt
else
echo “/etc/xinetd.conf文件权限不为600,不符合要求,建议设置权限为600” >> out.txt
fi
if [ $file7 = “-rw——-” ];then
echo “/etc/grub.conf文件权限为600,符合要求” >> out.txt
else
echo “/etc/grub.conf文件权限不为600,不符合要求,建议设置权限为600” >> out.txt
fi
if [ -f /etc/lilo.conf ];then
if [ $file8 = “-rw——-” ];then
echo “/etc/lilo.conf文件权限为600,符合要求” >> out.txt
else
echo “/etc/lilo.conf文件权限不为600,不符合要求,建议设置权限为600” >> out.txt
fi

else
echo “/etc/lilo.conf文件夹不存在”
fi
cat /etc/security/limits.conf | grep -V ^# | grep core
if [ $? -eq 0 ];then
soft=`cat /etc/security/limits.conf | grep -V ^# | grep core | awk {print $2}`
for i in $soft
do
if [ $i = “soft” ];then
echo “* soft core 0 已经设置” >> out.txt
fi
if [ $i = “hard” ];then
echo “* hard core 0 已经设置” >> out.txt
fi
done
else
echo “没有设置core,建议在/etc/security/limits.conf中添加* soft core 0和* hard core 0” >> out.txt
fi
echo “***************************”
echo “检查ssh配置文件中…”
echo “***************************”
cat /etc/ssh/sshd_config | grep -v ^# |grep “PermitRootLogin no”
if [ $? -eq 0 ];then
echo “已经设置远程root不能登陆,符合要求” >> out.txt
else
echo “不已经设置远程root不能登陆,不符合要求,建议/etc/ssh/sshd_config添加PermitRootLogin no” >> out.txt
fi
#检查telnet是否开启
telnetd=`cat /etc/xinetd.d/telnet | grep disable | awk ‘{print $3}’`
if [ $telnetd = “yes” ];then
echo “检测到telnet服务开启,不符合要求,建议关闭telnet” >> out.txt
fi
Protocol=`cat /etc/ssh/sshd_config | grep -v ^# | grep Protocol | awk ‘{print $2}’`
if [ $Protocol = 2 ];then
echo “openssh使用ssh2协议,符合要求” >> out.txt
fi
if [ $Protocol = 1 ];then
echo “openssh使用ssh1协议,不符合要求” >> out.txt
fi
#检查保留历时命令条数
HISTSIZE=`cat /etc/profile|grep HISTSIZE|head -1|awk -F[=] ‘{print $2}’`
if [ $HISTSIZE -eq 5 ];then
echo “保留历时命令条数为$HISTSIZE,符合要求” >> out.txt
else
echo “保留历时命令条数为$HISTSIZE,不符合要求,建议/etc/profile的HISTSIZE设置为5” >> out.txt
fi
#检查重要文件的属性
flag=0
for ((x=1;x<=15;x++))
do
apend=`lsattr /etc/passwd | cut -c $x`
if [ $apend = “i” ];then
echo “/etc/passwd文件存在i安全属性” >> out.txt
flag=1
fi
if [ $apend = “a” ];then
echo “/etc/passwd文件存在a安全属性” >> out.txt
flag=1
fi
done
if [ $flag = 0 ];then
echo “/etc/passwd文件不存在相关安全属性,建议使用chattr +i或chattr +a防止/etc/passwd被删除或修改” >> out.txt
fi
flag=0
for ((x=1;x<=15;x++))
do
apend=`lsattr /etc/shadow | cut -c $x`
if [ $apend = “i” ];then
echo “/etc/shadow文件存在i安全属性” >> out.txt
flag=1
fi
if [ $apend = “a” ];then
echo “/etc/shadow文件存在a安全属性” >> out.txt
flag=1
fi
done
if [ $flag = 0 ];then
echo “/etc/shadow文件不存在相关安全属性,建议使用chattr +i或chattr +a防止/etc/shadow被删除或修改” >> out.txt
fi
flag=0
for ((x=1;x<=15;x++))
do
apend=`lsattr /etc/gshadow | cut -c $x`
if [ $apend = “i” ];then
echo “/etc/gshadow文件存在i安全属性” >> out.txt
flag=1
fi
if [ $apend = “a” ];then
echo “/etc/gshadow文件存在a安全属性” >> out.txt
flag=1
fi
done
if [ $flag = 0 ];then
echo “/etc/gshadow文件不存在相关安全属性,建议使用chattr +i或chattr +a防止/etc/gshadow被删除或修改” >> out.txt
fi
flag=0
for ((x=1;x<=15;x++))
do
apend=`lsattr /etc/group | cut -c $x`
if [ $apend = “i” ];then
echo “/etc/group文件存在i安全属性” >> out.txt
flag=1
fi
if [ $apend = “a” ];then
echo “/etc/group文件存在a安全属性” >> out.txt
flag=1
fi
done
if [ $flag = 0 ];then
echo “/etc/group文件不存在相关安全属性,建议使用chattr +i或chattr +a防止/etc/group被删除或修改” >> out.txt
fi
#检查snmp默认团体口令public、private
if [ -f /etc/snmp/snmpd.conf ];then
public=`cat /etc/snmp/snmpd.conf | grep public | grep -v ^# | awk ‘{print $4}’`
private=`cat /etc/snmp/snmpd.conf | grep private | grep -v ^# | awk ‘{print $4}’`
if [ $public = “public” ];then
echo “发现snmp服务存在默认团体名public,不符合要求” >> out.txt
fi
if [[ $private = “private” ]];then
echo “发现snmp服务存在默认团体名private,不符合要求” >> out.txt
fi
else
echo “snmp服务配置文件不存在,可能没有运行snmp服务”
fi
#检查主机信任关系
rhosts=`find / -name .rhosts`
rhosts2=`find / -name hosts.equiv`
for i in $rhosts
do
if [ -f $i ];then
echo “找到信任主机关系,请查看${i}文件,请自行判断是否属于正常业务需求,建议删除信任IP” >> out.txt
fi
done
#检查日志审核功能是否开启
service auditd status
if [ $? = 0 ];then
echo “系统日志审核功能已开启,符合要求” >> out.txt
fi
if [ $? = 3 ];then
echo “系统日志审核功能已关闭,不符合要求,建议service auditd start开启” >> out.txt
fi
#检查磁盘动态空间,是否大于等于80%
space=`df -h | awk -F “[ %]+” ‘NR!=1{print $5}’`
for i in $space
do
if [ $i -ge 80 ];then
echo “警告!磁盘存储容量大于80%,建议扩充磁盘容量或者删除垃圾文件” >> out.txt
fi
done
echo “***************************”
echo “*** 检查完毕      ***”
echo “***************************”
————————————————
版权声明:本文为CSDN博主「nono100」的原创文章,遵循 CC 4.0 BY-SA 版权协议,转载请附上原文出处链接及本声明。
原文链接:https://blog.csdn.net/weifangwei100/article/details/53667636

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