open全部操作请使用root
一、前序准备条件
wget https://cdn.openbsd.org/pub/OpenBSD/OpenSSH/portable/openssh-8.3p1.tar.gz
wget http://www.openssl.org/source/openssl-1.1.1g.tar.gz
mkdir /data/lib64-bak
cp -p /usr/lib64/libssl.so.1.* /data/lib64-bak/
cp -p /usr/lib64/libcrypto.so.1.* /data/lib64-bak/

二、升级openssl环境至openssl-1.1.1g
–（1）查看源版本
[root@zj ~]# openssl version -a
OpenSSL 1.0.2e-fips-rhel5 01 Jul 2008

yum install -y zlib

–（2）卸载原有openssl

rpm -qa| grep openssl
rpm -e `rpm -qa | grep openssl` --nodeps 

–（3）解压安装
tar zxf openssl-1.1.1g.tar.gz
cd openssl-1.1.1g
./config shared zlib
make
make install
mv /usr/bin/openssl /usr/bin/openssl.bak
mv /usr/include/openssl /usr/include/openssl.bak
ln -s /usr/local/bin/openssl /usr/bin/openssl
ln -s /usr/local/include/openssl /usr/include/openssl
echo “/usr/local/lib” >> /etc/ld.so.conf
ldconfig -v
–（4）查看是否升级成功
openssl version -a

OpenSSL 1.1.1g 7 Apr 2014

–（5）***遇到openssl: error while loading shared libraries: libssl.so.1.1: cannot open shared object file: No such file or directory执行以下
ln -s /usr/local/lib64/libssl.so.1.1 /usr/lib64/libssl.so.1.1
ln -s /usr/local/lib64/libcrypto.so.1.1 /usr/lib64/libcrypto.so.1.1

三、Openssh-8.4P1修复
–（1）检查openssh
rpm -qa|grep openssh

–（2）避免openssh失败无法登陆安装telnet --连网或者单机传包
rpm -Uvh telnet-server-0.17-64.el7.x86_64.rpm
rpm -Uvh xinetd-2.3.15-13.el7.x86_64.rpm

yum install -y telnet-server xinetd

注意：yum如果报错的话是因为缺少文件，即执行下面四的步骤即可
echo -e ‘pts/0\npts/1\npts/2\npts/3’ >>/etc/securetty
systemctl enable xinetd.service
systemctl enable telnet.socket
systemctl start telnet.socket
systemctl start xinetd

–（3）验证telnet已可用，通过telnet23端口连接主机

–（4）安装必要的软件:–连网或者单机传包
gcc pam pam-devel zlib zlib-devel openssl-devel
rpm -Uvh 程序包名

yum -y update pam zlib

yum -y install gcc pam pam-devel zlib zlib-devel openssl-devel

–（5）卸载旧的openssh

rpm -e `rpm -qa | grep openssh` --nodeps

–（6）解压编译

tar -zxvf openssh-8.4p1.tar.gz

cd openssh-8.4p1

./configure --prefix=/usr --sysconfdir=/etc/ssh --with-md5-passwords --with-zlib --with-ssl-dir=/usr/local/ssl --with-privsep-path=/var/lib/sshd

make

make install

如果遇到如下报错：chmod 600 /etc/ssh/ssh_host_*

chmod 600 /etc/ssh/ssh_host_rsa_key
chmod 600 /etc/ssh/ssh_host_ed25519_key
chmod 600 /etc/ssh/ssh_host_ecdsa_key

#修订配置文件
echo ‘PermitRootLogin no’ >> /etc/ssh/sshd_config （注意：执行这句代表root不能登录，请根据情况操作）
cp -p contrib/redhat/sshd.init /etc/init.d/sshd
chmod +x /etc/init.d/sshd
chkconfig --add sshd

#加入开机启动
chkconfig sshd on
chkconfig --list sshd
service sshd start

#停止telnet服务
systemctl stop telnet.socket
systemctl disable telnet.socket
systemctl stop xinetd.service
systemctl disable xinetd.service

四、整体验证，及修复
–（1）测试yum ping ssh cp等命令以及上传、重新打开新的ssh连接情况
cp /data/lib64-bak/* /usr/lib64/
cd /usr/lib64/
ll libssl*
ll libcrypt*

–（2）将原来备份的libssl和libcrypto进行软连接
ln -s libssl.so.1.0.1e /usr/lib64/libssl.so.10
ln -s libcrypto.so.1.0.1e /usr/lib64/libcrypto.so.10

–（3）再次验证之前使用有问题的功能
查看当前openssh和openssl版本
ssh -V
openssl version -a

报错解析

最近新发现的一个问题rpm会因为升级openssl而报错

解决：下载rpm依赖包