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Linux OpenSSH
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前言： 根据 国家信息安全漏洞共享平台 漏洞统计报告，信息安全数据泄露，漏洞入侵时时刻刻都在发生着，我们必须实时监控漏洞发现与威胁感知，及时预警网络安全漏洞的存在，以便及时整改修复漏洞，避免产生更大的安全事故，确保业务和系统的网络安全、稳定，促进社会的和谐发展。 一、OpenSSH 介绍OpenSSH 是 SSH （Secure SHell） 协议的免费开源实现。SSH协议族可以用来进行远程控制， 或在计算机之间传送文件。而实现此功能的传统方式，如telnet(终端仿真协议)、 rcp ftp、 rlogin、rsh都是极为不安全的，并且会使用明文传送密码。OpenSSH提供了服务端后台程序和客户端工具，用来加密远程控制和文件传输过程中的数据，并由此来代替原来的类似服务。 二、源码包官网目前基于最新版本 OpenSSH-9.0p1、OpenSSL1.1.1q 更新 ，测试环境为Centos7.x以上，请结合个人情况参考更新，其他版本请自测！ Zlib官网：http://www.zlib.net/ OpenSSL官网：https://www.openssl.org/ OpenSSH官网：https://www.openssh.com/ 注： 手动下载官方源码包时，可能会非常慢，可以去常用的镜像站点（比如 清华镜像站、阿里镜像站 等）去下载 三、OpenSSH 安装 1.开启 telnet 服务，临时关闭防火墙由于一般登录方式为ssh，所以需要安装其他登录方式，比如Telnet服务，防止升级失败 #安装telnet yum install xinetd telnet-server telnet -y #备份文件securetty mv /etc/securetty.bak #配置telnet登录的终端类型,增加一些pts终端 pts=$'pts/0\npts/1\npts/2\npts/3' && echo "$pts" >> /etc/securetty #开启服务 systemctl start telnet.socket service xinetd start #关闭防火墙（或者开启23端口） systemctl stop firewalld.service systemctl disable firewalld.service 2.环境准备 #安装wget yum install -y wget #安装tar yum install -y tar #软件包准备 cd /opt #解压目录 wget --no-check-certificate https://www.zlib.net/zlib-1.2.12.tar.gz wget --no-check-certificate https://www.openssl.org/source/openssl-1.1.1q.tar.gz wget --no-check-certificate https://cdn.openbsd.org/pub/OpenBSD/OpenSSH/portable/openssh-9.0p1.tar.gz #解压软件包 tar -zxvf zlib-1.2.12.tar.gz tar -zxvf openssl-1.1.1q.tar.gz tar -zxvf openssh-9.0p1.tar.gz #备份 mv /etc/ssh /etc/ssh.bak cp /etc/pam.d/sshd.pam /etc/pam.d/sshd.pam.bak cp /etc/init.d/sshd /etc/init.d/sshd.bak cp /usr/bin/openssl /usr/bin/openssl.bak ##卸载原有的openssh rpm -e --nodeps `rpm -qa | grep openssh` ###安装相关依赖包 yum install vim gcc gcc-c++ glibc make autoconf openssl openssl-devel pcre-devel pam-devel zlib-devel tcp_wrappers-devel tcp_wrappers; 3.SSH安装* 3.1 Zlib安装 #进入zlib解压目录 cd /opt/zlib-1.2.12 #编译安装 ./configure --prefix=/usr/local/zlib make && make test && make install # ll /usr/local/zlib ldconfig -v /sbin/ldconfig 3.2 OpenSSL安装注： 1. SSL更新前如果编译目录下有原版本，需删除后编译，防止SSH编译失败！ 2.结尾处截图为初发文时间更新版本，和操作语句新版本不冲突 #进入openssl解压目录 cd /opt/openssl-1.1.1p #编译安装 ./config shared zlib --prefix=/usr/local/ssl make clean && make -j 4 && make install #更新函数库 echo "/usr/lcoal/ssl/lib" >> /etc/ld.so.conf ldconfig ln -s /usr/local/ssl/bin/openssl /usr/bin/openssl ln -s /usr/local/ssl/lib/libssl.so.1.1 /usr/lib64/libssl.so.1.1 ln -s /usr/local/ssl/lib/libcrypto.so.1.1 /usr/lib64/libcrypto.so.1.1 #检查是否升级成功 openssl version -a
5.1. Permissions 0737 for ‘/etc/ssh/ssh_host_rsa_key’ are too open”问题 解决方法：更改报错文件权限 chmod 600 /etc/ssh/ssh_host_rsa_key chmod 600 /etc/ssh/ssh_host_dsa_key chmod 600 /etc/ssh/ssh_host_ecdsa_key chmod 600 /etc/ssh/ssh_host_ed25519_key5.2. 升级完openssh后root账号无法登录的问题 解决方法：查下/etc/ssh/sshd_config的配置文件中。UsePAM 这个是否注释了，去掉注释并修改为UsePAM yes 四、OpenSSH-9.0p1 升级脚本*注：考虑系统内容环境因素，脚本请根据个人情况，进行升级，固有些差异的地方需要根据实际情况修改！！ #!/bin/bash # ######################################################### # Function :openssh-9.0p1 update # # Platform :Centos7.X # # Version :2.0 # # Date :2022-05-01 # ######################################################### clear export LANG="en_US.UTF-8" #版本号 zlib_version="zlib-1.2.12" openssl_version="openssl-1.1.1q" openssh_version="openssh-9.0p1" #安装包地址 file="/opt" #默认编译路径 default="/usr/local" date_time=`date +%Y-%m-%d—%H:%M` #安装目录 file_install="$file/openssh_install" file_backup="$file/openssh_backup" file_log="$file/openssh_log" #源码包链接 zlib_download="https://www.zlib.net/$zlib_version.tar.gz" openssl_download="https://www.openssl.org/source/$openssl_version.tar.gz" openssh_download="https://cdn.openbsd.org/pub/OpenBSD/OpenSSH/portable/$openssh_version.tar.gz" Install_make() { # Check if user is root if [ $(id -u) != "0" ]; then echo -e "\033[33m--------------------------------------------------------------- \033[0m" echo -e " 当前用户为普通用户，必须使用root用户运行，脚本退出中......" "\033[31m Error\033[0m" echo -e "\033[33m--------------------------------------------------------------- \033[0m" echo "" sleep 4 exit fi #判断是否安装wget echo -e "\033[33m 正在安装Wget...... \033[0m" sleep 2 echo "" if ! type wget >/dev/null 2>&1; then yum install -y wget else echo -e "\033[33m--------------------------------------------------------------- \033[0m" echo -e " wget已经安装了：" "\033[32m Please continue\033[0m" echo -e "\033[33m--------------------------------------------------------------- \033[0m" echo "" fi #判断是否安装tar echo -e "\033[33m 正在安装TAR...... \033[0m" sleep 2 echo "" if ! type tar >/dev/null 2>&1; then yum install -y tar else echo "" echo -e "\033[33m--------------------------------------------------------------- \033[0m" echo -e " tar已经安装了：" "\033[32m Please continue\033[0m" echo -e "\033[33m--------------------------------------------------------------- \033[0m" fi echo "" #安装相关依赖包 echo -e "\033[33m 正在安装依赖包...... \033[0m" sleep 3 echo "" yum install gcc gcc-c++ glibc make autoconf openssl openssl-devel pcre-devel pam-devel zlib-devel tcp_wrappers-devel tcp_wrappers if [ $? -eq 0 ];then echo "" echo -e "\033[33m--------------------------------------------------------------- \033[0m" echo -e " 安装软件依赖包成功 " "\033[32m Success\033[0m" echo -e "\033[33m--------------------------------------------------------------- \033[0m" else echo -e "\033[33m--------------------------------------------------------------- \033[0m" echo -e " 解压源码包失败，脚本退出中......" "\033[31m Error\033[0m" echo -e "\033[33m--------------------------------------------------------------- \033[0m" sleep 4 exit fi echo "" } Install_backup() { #创建文件（可修改） mkdir -p $file_install mkdir -p $file_backup mkdir -p $file_log mkdir -p $file_backup/zlib mkdir -p $file_backup/ssl mkdir -p $file_backup/ssh mkdir -p $file_log/zlib mkdir -p $file_log/ssl mkdir -p $file_log/ssh #备份文件（可修改） cp -rf /usr/bin/openssl $file_backup/ssl/openssl_$date_time.bak > /dev/null cp -rf /etc/init.d/sshd $file_backup/ssh/sshd_$date_time.bak > /dev/null cp -rf /etc/ssh $file_backup/ssh/ssh_$date_time.bak > /dev/null cp -rf /usr/lib/systemd/system/sshd.service $file_backup/ssh/sshd_$date_time.service.bak > /dev/null cp -rf /etc/pam.d/sshd.pam $file_backup/ssh/sshd_$date_time.pam.bak > /dev/null } Remove_openssh() { ##并卸载原有的openssh（可修改） rpm -e --nodeps `rpm -qa | grep openssh` } Install_tar() { #下载的源码包，检查是否解压（可修改） # if [ -e $file/$zlib_version.tar.gz ] && [ -e $file/$openssl_version.tar.gz ] && [ -e /$file/$openssh_version.tar.gz ];then # echo -e " 下载软件源码包已存在 " "\033[32m Please continue\033[0m" # else # echo -e "\033[33m 未发现本地源码包，链接检查获取中........... \033[0m " # echo "" # cd $file # wget --no-check-certificate $zlib_download # wget --no-check-certificate $openssl_download # wget --no-check-certificate $openssh_download # echo "" # fi #zlib echo -e "\033[33m 正在下载Zlib软件包...... \033[0m" sleep 3 echo "" if [ -e $file/$zlib_version.tar.gz ] ;then echo -e " 下载软件源码包已存在 " "\033[32m Please continue\033[0m" else echo -e "\033[33m 未发现zlib本地源码包，链接检查获取中........... \033[0m " sleep 1 echo "" cd $file wget --no-check-certificate $zlib_download echo "" fi #openssl echo -e "\033[33m 正在下载Openssl软件包...... \033[0m" sleep 3 echo "" if [ -e $file/$openssl_version.tar.gz ] ;then echo -e " 下载软件源码包已存在 " "\033[32m Please continue\033[0m" else echo -e "\033[33m 未发现openssl本地源码包，链接检查获取中........... \033[0m " echo "" sleep 1 cd $file wget --no-check-certificate $openssl_download echo "" fi #openssh echo -e "\033[33m 正在下载Openssh软件包...... \033[0m" sleep 3 echo "" if [ -e /$file/$openssh_version.tar.gz ];then echo -e " 下载软件源码包已存在 " "\033[32m Please continue\033[0m" else echo -e "\033[33m 未发现openssh本地源码包，链接检查获取中........... \033[0m " echo "" sleep 1 cd $file wget --no-check-certificate $openssh_download fi } echo "" echo "" #安装zlib Install_zlib(){ echo -e "\033[33m 1.1-正在解压Zlib软件包...... \033[0m" sleep 3 echo "" cd $file && mkdir -p $file_install && tar -xzf zlib*.tar.gz -C $file_install > /dev/null if [ -d $file_install/$zilb_version ];then echo -e "\033[33m--------------------------------------------------------------- \033[0m" echo -e " zilb解压源码包成功" "\033[32m Success\033[0m" echo -e "\033[33m--------------------------------------------------------------- \033[0m" echo "" else echo -e "\033[33m--------------------------------------------------------------- \033[0m" echo -e " zilb解压源码包失败，脚本退出中......" "\033[31m Error\033[0m" echo -e "\033[33m--------------------------------------------------------------- \033[0m" echo "" sleep 4 exit fi echo -e "\033[33m 1.2-正在编译安装Zlib服务.............. \033[0m" sleep 3 echo "" cd $file_install/zlib* ./configure --prefix=$default/$zlib_version > $file_log/zlib/zlib_configure_$date_time.txt #> /dev/null 2>&1 if [ $? -eq 0 ];then echo -e "\033[33m make... \033[0m" make > /dev/null 2>&1 echo $? echo -e "\033[33m make test... \033[0m" make test > /dev/null 2>&1 echo $? echo -e "\033[33m make install... \033[0m" make install > /dev/null 2>&1 echo $? else echo -e "\033[33m--------------------------------------------------------------- \033[0m" echo -e " 编译安装压缩库失败，脚本退出中..." "\033[31m Error\033[0m" echo -e "\033[33m--------------------------------------------------------------- \033[0m" echo "" sleep 4 exit fi if [ -e $default/$zlib_version/lib/libz.so ];then sed -i '/zlib/'d /etc/ld.so.conf echo "$default/$zlib_version/lib" >> /etc/ld.so.conf echo "$default/$zlib_version/lib" >> /etc/ld.so.conf.d/zlib.conf ldconfig -v > $file_log/zlib/zlib_ldconfig_$date_time.txt > /dev/null 2>&1 /sbin/ldconfig fi } echo "" echo "" Install_openssl(){ echo -e "\033[33m 2.1-正在解压Openssl...... \033[0m" sleep 3 echo "" cd $file && tar -xvzf openssl*.tar.gz -C $file_install > /dev/null if [ -d $file_install/$openssl_version ];then echo -e "\033[33m--------------------------------------------------------------- \033[0m" echo -e " OpenSSL解压源码包成功" "\033[32m Success\033[0m" echo -e "\033[33m--------------------------------------------------------------- \033[0m" else echo -e "\033[33m--------------------------------------------------------------- \033[0m" echo -e " OpenSSL解压源码包失败，脚本退出中......" "\033[31m Error\033[0m" echo -e "\033[33m--------------------------------------------------------------- \033[0m" echo "" sleep 4 exit fi echo "" echo -e "\033[33m 2.2-正在编译安装Openssl服务...... \033[0m" sleep 3 echo "" cd $file_install/$openssl_version ./config shared zlib --prefix=$default/$openssl_version > $file_log/ssl/ssl_config_$date_time.txt #> /dev/null 2>&1 if [ $? -eq 0 ];then echo -e "\033[33m make clean... \033[0m" make clean > /dev/null 2>&1 echo $? echo -e "\033[33m make -j 4... \033[0m" make -j 4 > /dev/null 2>&1 echo $? echo -e "\033[33m make install... \033[0m" make install > /dev/null 2>&1 echo $? else echo -e "\033[33m--------------------------------------------------------------- \033[0m" echo -e " 编译安装OpenSSL失败，脚本退出中..." "\033[31m Error\033[0m" echo -e "\033[33m--------------------------------------------------------------- \033[0m" echo "" sleep 4 exit fi mv /usr/bin/openssl /usr/bin/openssl_$date_time.bak #先备份 if [ -e $default/$openssl_version/bin/openssl ];then sed -i '/openssl/'d /etc/ld.so.conf echo "$default/$openssl_version/lib" >> /etc/ld.so.conf ln -s $default/$openssl_version/bin/openssl /usr/bin/openssl ln -s $default/$openssl_version/lib/libssl.so.1.1 /usr/lib64/libssl.so.1.1 ln -s $default/$openssl_version/lib/libcrypto.so.1.1 /usr/lib64/libcrypto.so.1.1 ldconfig -v > $file_log/ssl/ssl_ldconfig_$date_time.txt > /dev/null 2>&1 /sbin/ldconfig echo -e "\033[33m--------------------------------------------------------------- \033[0m" echo -e " 编译安装OpenSSL " "\033[32m Success\033[0m" echo -e "\033[33m--------------------------------------------------------------- \033[0m" echo "" echo -e "\033[33m 2.3-正在输出 OpenSSL 版本状态.............. \033[0m" sleep 3 echo "" echo -e "\033[32m====================== OpenSSL veriosn ===================== \033[0m" echo "" openssl version -a echo "" echo -e "\033[32m======================================================= \033[0m" sleep 2 else echo "" echo -e "\033[33m--------------------------------------------------------------- \033[0m" echo -e " OpenSSL软连接失败，脚本退出中..." "\033[31m Error\033[0m" echo -e "\033[33m--------------------------------------------------------------- \033[0m" fi } echo "" echo "" Install_openssh(){ echo -e "\033[33m 3.1-正在解压OpenSSH...... \033[0m" sleep 3 echo "" cd $file && tar -xvzf openssh*.tar.gz -C $file_install > /dev/null if [ -d $file_install/$openssh_version ];then echo -e "\033[33m--------------------------------------------------------------- \033[0m" echo -e " OpenSSh解压源码包成功" "\033[32m Success\033[0m" echo -e "\033[33m--------------------------------------------------------------- \033[0m" else echo -e "\033[33m--------------------------------------------------------------- \033[0m" echo -e " OpenSSh解压源码包失败，脚本退出中......" "\033[31m Error\033[0m" echo -e "\033[33m--------------------------------------------------------------- \033[0m" echo "" sleep 4 exit fi echo "" echo -e "\033[33m 3.2-正在编译安装OpenSSH服务...... \033[0m" sleep 3 echo "" mv /etc/ssh /etc/ssh_$date_time.bak #先备份 cd $file_install/$openssh_version ./configure --prefix=$default/$openssh_version --sysconfdir=/etc/ssh --with-ssl-dir=$default/$openssl_version --with-zlib=$default/$zlib_version > $file_log/ssh/ssh_configure_$date_time.txt #> /dev/null 2>&1 if [ $? -eq 0 ];then echo -e "\033[33m make -j 4... \033[0m" make -j 4 > /dev/null 2>&1 echo $? echo -e "\033[33m make install... \033[0m" make install > /dev/null 2>&1 echo $? else echo -e "\033[33m--------------------------------------------------------------- \033[0m" echo -e " 编译安装OpenSSH失败，脚本退出中......" "\033[31m Error\033[0m" echo -e "\033[33m--------------------------------------------------------------- \033[0m" echo "" sleep 4 exit fi echo "" echo -e "\033[33m--------------------------------------------------------------- \033[0m" echo -e " 编译安装OpenSSH " "\033[32m Success\033[0m" echo -e "\033[33m--------------------------------------------------------------- \033[0m" echo "" sleep 2 echo -e "\033[32m==================== OpenSSH—file veriosn =================== \033[0m" echo "" /usr/local/$openssh_version/bin/ssh -V echo "" echo -e "\033[32m======================================================= \033[0m" sleep 3 echo "" echo -e "\033[33m 3.3-正在迁移OpenSSH配置文件...... \033[0m" sleep 3 echo "" #迁移sshd if [ -f "/etc/init.d/sshd" ];then mv /etc/init.d/sshd /etc/init.d/sshd_$date_time.bak else echo -e " /etc/init.d/sshd不存在 " "\033[31m Not backed up(可忽略)\033[0m" fi cp -rf $file_install/$openssh_version/contrib/redhat/sshd.init /etc/init.d/sshd; chmod u+x /etc/init.d/sshd; chkconfig --add sshd ##自启动 chkconfig --list |grep sshd; chkconfig sshd on #备份启动脚本,不一定有 if [ -f "/usr/lib/systemd/system/sshd.service" ];then mv /usr/lib/systemd/system/sshd.service /usr/lib/systemd/system/sshd.service_bak else echo -e " sshd.service不存在" "\033[31m Not backed up(可忽略)\033[0m" fi #备份复制sshd.pam文件 if [ -f "/etc/pam.d/sshd.pam" ];then mv /etc/pam.d/sshd.pam /etc/pam.d/sshd.pam_$date_time.bak else echo -e " sshd.pam不存在" "\033[31m Not backed up(可忽略)\033[0m" fi cp -rf $file_install/$openssh_version/contrib/redhat/sshd.pam /etc/pam.d/sshd.pam #迁移ssh_config cp -rf $file_install/$openssh_version/sshd_config /etc/ssh/sshd_config sed -i 's/Subsystem/#Subsystem/g' /etc/ssh/sshd_config echo "Subsystem sftp $default/$openssh_version/libexec/sftp-server" >> /etc/ssh/sshd_config cp -rf $default/$openssh_version/sbin/sshd /usr/sbin/sshd cp -rf /$default/$openssh_version/bin/ssh /usr/bin/ssh cp -rf $default/$openssh_version/bin/ssh-keygen /usr/bin/ssh-keygen sed -i 's/#PasswordAuthentication\ yes/PasswordAuthentication\ yes/g' /etc/ssh/sshd_config #grep -v "[[:space:]]*#" /etc/ssh/sshd_config |grep "PubkeyAuthentication yes" echo 'PermitRootLogin yes' >> /etc/ssh/sshd_config #重启sshd service sshd start > /dev/null 2>&1 if [ $? -eq 0 ];then echo -e "\033[33m--------------------------------------------------------------- \033[0m" echo -e " 启动OpenSSH服务成功" "\033[32m Success\033[0m" echo -e "\033[33m--------------------------------------------------------------- \033[0m" echo "" sleep 2 #删除源码包（可修改） rm -rf $file/*$zlib_version.tar.gz rm -rf $file/*$openssl_version.tar.gz rm -rf $file/*$openssh_version.tar.gz #rm -rf $file_install echo -e "\033[33m 3.4-正在输出 OpenSSH 版本...... \033[0m" sleep 3 echo "" echo -e "\033[32m==================== OpenSSH veriosn =================== \033[0m" echo "" ssh -V echo "" echo -e "\033[32m======================================================== \033[0m" else echo -e "\033[33m--------------------------------------------------------------- \033[0m" echo -e " 启动OpenSSH服务失败，脚本退出中......" "\033[31m Error\033[0m" echo -e "\033[33m--------------------------------------------------------------- \033[0m" sleep 4 exit fi echo "" } End_install() { ##sshd状态 echo "" echo -e "\033[33m 输出sshd服务状态： \033[33m" sleep 2 echo "" systemctl status sshd.service echo "" echo "" echo "" sleep 1 echo -e "\033[33m==================== OpenSSH file =================== \033[0m" echo "" echo -e " Openssh升级安装目录请前往: " cd $file_install && pwd cd ~ echo "" echo -e " Openssh升级备份目录请前往: " cd $file_backup && pwd cd ~ echo "" echo -e " Openssh升级日志目录请前往: " cd $file_log && pwd cd ~ echo "" echo -e "\033[33m======================================================= \033[0m" } Install_make Install_backup Remove_openssh Install_tar Install_zlib Install_openssl Install_openssh End_install |
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