脚本环境：RHEL6.*
脚本说明：该脚本作用为纯执行检测不涉及更改配置等操作，与直接上来就改安全配置等基线脚本相比相对安全一些。虽然如此，在你执行该脚本之前仍然建议你备份或快照一下目标系统。
代码部分：
#! /bin/bash cat <<EOF ************************************************************************* linux安全配置扫描脚本: 1. 输出结果也可以在当前目录的out.txt中查看 2. 检查范围： -》账号策略检查 -》账号注销检查 -》GRUB密码检查 -》LILO密码检查 -》非root账号但UID为0的用户检查 -》/etc/profile中umask默认值检查 -》/etc/csh.cshrc中umask默认值检查 -》/etc/bashrc中umask默认值检查 -》重要文件权限检查 -》内核文件dump配置检查 ************************************************************************* EOF rm -rf ./out.txt echo -e "\n" echo "[1] 账号策略检查中..." 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 $passmax -gt 0 ];then echo " [OK]口令生存周期为${passmax}天，符合要求" >> out.txt else echo " [ X ] 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 [ $passmin -ge 6 ];then echo " [OK]口令更改最小时间间隔为${passmin}天，符合要求" >> out.txt else echo " [ X ] 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 [ $passlen -ge 8 ];then echo " [OK]口令最小长度为${passlen},符合要求" >> out.txt else echo " [ X ] 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 $passmax ];then echo " [OK]口令过期警告时间天数为${passage},符合要求" >> out.txt else echo " [ X ] 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 'check over' echo -e "\n" echo "[2] 账号注销检查中..." TMOUT=`cat /etc/profile | grep TMOUT | awk -F[=] '{print $2}'` if [ ! $TMOUT ];then echo " [ X ] 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 else 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 " [ X ] 账号超时时间$TMOUT秒,不符合要求，建议设置小于600秒" >> out.txt fi fi echo "..." echo 'check over' echo -e "\n" echo "[3] GRUB密码检查中..." grup_pwd=`cat /etc/grub.conf | grep -v ^# | grep password 2> /dev/null` if [ $? -eq 0 ];then echo " [ √ ] 已设置grub密码,符合要求" >> out.txt else echo " [ X ] 没有设置grub密码，不符合要求,建议设置grub密码" >> out.txt fi echo "..." echo "check over" echo -e "\n" echo "[4] LILO密码检查中..." if [ ! -f /etc/lilo.conf ] ; then echo " [ √ ] lilo.conf配置文件不存在，系统可能不是通过LILO引导" >> out.txt else lilo_pwd=`cat /etc/lilo.conf | grep -v ^# | grep password &> /dev/null` if [ $? -eq 0 ];then echo " [ √ ] 已设置lilo密码,符合要求" >> out.txt else echo " [ X ] 没有设置lilo密码，不符合要求,建议设置lilo密码(操作有风险，需慎重!)" >> out.txt fi fi echo "..." echo "check over" echo -e "\n" echo "[5] 非root账号但UID为0的用户检查中..." UIDS=`awk -F[:] 'NR!=1{print $3}' /etc/passwd` flag=0 for i in $UIDS do if [ $i = 0 ];then flag=1 fi done if [ $flag != 1 ];then echo " [ √ ] 不存在root账号外的UID为0的异常用户" >> out.txt else echo " [ X ] 存在非root但UID为0的异常用户，请立刻进行排查" >> out.txt fi echo "..." echo "check over" echo -e "\n" echo "[6] /etc/profile中umask默认值检查中..." umask1=`cat /etc/profile | grep umask | grep -v '^#' | awk '{print $2}'` flags=0 for i in $umask1 do if [ $i = "027" ];then flags=1 fi done if [ $flags = 1 ];then echo " [ √ ] /etc/profile文件中所设置的umask为${i},符合要求" >> out.txt else echo " [ X ] /etc/profile文件中所设置的umask为${i},不符合要求" >> out.txt echo " 【理论上建议设置值为027,但因系统重要程度不同请根据具体情况慎重操作,如不确定请暂忽略此项】" >> out.txt fi echo "..." echo "check over" echo -e "\n" echo "[7] /etc/csh.cshrc中umask默认值检查中..." umask2=`cat /etc/csh.cshrc | grep umask | grep -v '^#' | awk '{print $2}'` flags=0 for i in $umask2 do if [ $i = "027" ];then flags=1 fi done if [ $flags = 1 ];then echo " [ √ ] /etc/csh.cshrc文件中所设置的umask为${i},符合要求" >> out.txt else echo " [ X ] /etc/csh.cshrc文件中所设置的umask为${i},不符合要求" >> out.txt echo " 【理论上建议设置值为027,但因系统重要程度不同请根据具体情况慎重操作,如不确定请暂忽略此项】" >> out.txt fi echo "..." echo "check over" echo -e "\n" echo "[8] /etc/bashrc中umask默认值检查中..." umask3=`cat /etc/bashrc | grep umask | grep -v '^ #' | awk '{print $2}'` flags=0 for i in $umask3 do if [ $i = "027" ];then flags=1 fi done if [ $flags = 1 ];then echo " [ √ ] /etc/bashrc文件中所设置的umask为${i},符合要求" >> out.txt else echo " [ X ] /etc/bashrc文件中所设置的umask为${i},不符合要求" >> out.txt echo " 【理论上建议设置值为027,但因系统重要程度不同请根据具体情况慎重操作,如不确定请暂忽略此项】" >> out.txt fi echo "..." echo "check over" echo -e "\n" echo "[9] 重要文件权限检查中..." file1=`ls -l /etc/passwd | awk '{print $1}'` if [ $file1 = "-rw-r--r--." ];then echo " [ √ ] /etc/passwd文件权限为644，符合要求" >> out.txt else echo " [ X ] /etc/passwd文件权限为[$file1.],不符合要求" >> out.txt fi file2=`ls -l /etc/shadow | awk '{print $1}'` if [ $file2 = "-rw-r--r--." ] || [ $file2 = "----------." ];then echo " [ √ ] /etc/shadow文件权限为400或000，符合要求" >> out.txt else echo " [ X ] /etc/shadow文件权限为${file2},不符合要求" >> out.txt fi file3=`ls -l /etc/group | awk '{print $1}'` if [ $file3 = "-rw-r--r--." ];then echo " [ √ ] /etc/group文件权限为644，符合要求" >> out.txt else echo " [ X ] /etc/group文件权限为$file3，不符合要求" >> out.txt fi file4=`ls -l /etc/securetty | awk '{print $1}'` if [ $file4 = "-rw-------." ];then echo " [ √ ] /etc/security文件权限为600，符合要求" >> out.txt else echo " [ X ] /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 file5=`ls -l /etc/services | awk '{print $1}'` if [ $file5 = "-rw-r--r--." ];then echo " [ √ ] /etc/services文件权限为644，符合要求" >> out.txt else echo " [ X ] /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 file6=`ls -l /etc/xinetd.conf | awk '{print $1}'` if [ !-f $file6 ];then echo " [ √ ] /etc/xinetd.conf文件不存在,暂略此项" >> out.txt else if [ $file6 = "-rw-------." ];then echo " [ √ ] /etc/xinetd.conf文件权限为600，符合要求" >> out.txt else echo " [ X ] /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 fi file7=`ls -l /etc/grub.conf | awk '{print $1}'` if [ $file7 = "-rw-------." ];then echo " [ √ ] /etc/grub.conf文件权限为600，符合要求" >> out.txt else echo " [ X ] /etc/grub.conf文件权限为$file7，不符合要求，建议设置权限为600" >> out.txt fi file8=`ls -l /etc/lilo.conf | awk '{print $1}'` 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 " [ X ] /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文件不存在,暂略此项" >> out.txt fi echo "..." echo "check over" echo -e "\n" echo "[10] 内核文件dump配置检查中..." cat /etc/security/limits.conf | grep -v ^# | grep core if [ $? = 0 ];then #soft=`cat /etc/security/limits.conf| grep -V ^# | grep core | awk {print $2}` soft=`cat /etc/security/limits.conf| grep -v '^#' | awk '{print $2}'` &> /dev/null for i in $soft do if [ $i = "soft" ];then echo -e " [ √ ] 内核文件dump配置检查[*\tsoft\tcore\t0]已经设置" >> out.txt fi if [ $i = "hard" ];then echo -e " [ √ ] 内核文件dump配置检查[*\thard\tcore\t0]已经设置" >> out.txt fi done else echo -e " [ X ] 没有设置core，建议在/etc/security/limits.conf中添加[*\tsoft\tcore\t0]和[*\thard\tcore\t0]" >> out.txt fi echo "..." echo "check over" echo -e "\n" echo "--------------------------------------------------------------------------" echo "" echo "扫描结果：" echo "" cat ./out.txt echo "" echo "--------------------------------------------------------------------------" echo ""
执行结果：
[root@localhost ~]# ./linuxCheck.sh ************************************************************************* linux安全配置扫描脚本: 1. 输出结果也可以在当前目录的out.txt中查看 2. 检查范围： -》账号策略检查 -》账号注销检查 -》GRUB密码检查 -》LILO密码检查 -》非root账号但UID为0的用户检查 -》/etc/profile中umask默认值检查 -》/etc/csh.cshrc中umask默认值检查 -》/etc/bashrc中umask默认值检查 -》重要文件权限检查 -》内核文件dump配置检查 ************************************************************************* [1] 账号策略检查中... ... check over [2] 账号注销检查中... ... check over [3] GRUB密码检查中... ... check over [4] LILO密码检查中... ... check over [5] 非root账号但UID为0的用户检查中... ... check over [6] /etc/profile中umask默认值检查中... ... check over [7] /etc/csh.cshrc中umask默认值检查中... ... check over [8] /etc/bashrc中umask默认值检查中... ... check over [9] 重要文件权限检查中... ls: cannot access /etc/xinetd.conf: No such file or directory ls: cannot access /etc/lilo.conf: No such file or directory ... check over [10] 内核文件dump配置检查中... * soft core 0 ... check over -------------------------------------------------------------------------- 扫描结果： [ X ] 口令生存周期为99999天，不符合要求,建议设置不大于90天 [ X ] 口令更改最小时间间隔为0天，不符合要求，建议设置大于等于6天 [ X ] 口令最小长度为5,不符合要求，建议设置最小长度大于等于8 [ X ] 口令过期警告时间天数为7,不符合要求，建议设置大于等于30并小于口令生存周期 [ X ] 账号超时不存在自动注销,不符合要求，建议设置小于600秒 [ √ ] 已设置grub密码,符合要求 [ √ ] lilo.conf配置文件不存在，系统可能不是通过LILO引导 [ √ ] 不存在root账号外的UID为0的异常用户 [ X ] /etc/profile文件中所设置的umask为022,不符合要求 【理论上建议设置值为027,但因系统重要程度不同请根据具体情况慎重操作,如不确定请暂忽略此项】 [ X ] /etc/csh.cshrc文件中所设置的umask为022,不符合要求 【理论上建议设置值为027,但因系统重要程度不同请根据具体情况慎重操作,如不确定请暂忽略此项】 [ X ] /etc/bashrc文件中所设置的umask为022,不符合要求 【理论上建议设置值为027,但因系统重要程度不同请根据具体情况慎重操作,如不确定请暂忽略此项】 [ √ ] /etc/passwd文件权限为644，符合要求 [ √ ] /etc/shadow文件权限为400或000，符合要求 [ √ ] /etc/group文件权限为644，符合要求 [ √ ] /etc/security文件权限为600，符合要求 [ √ ] /etc/services文件权限为644，符合要求 [ √ ] /etc/xinetd.conf文件不存在,暂略此项 [ X ] /etc/grub.conf文件权限为lrwxrwxrwx.，不符合要求，建议设置权限为600 [ √ ] /etc/lilo.conf文件不存在,暂略此项 [ √ ] 内核文件dump配置检查[* soft core 0]已经设置 [ √ ] 内核文件dump配置检查[* hard core 0]已经设置 --------------------------------------------------------------------------