openssh8.3p1 RPM 升级

1.下载openssh8.3p1升级包

centos7 https://download.csdn.net/download/ChongDanYiQieHuiYi/12570967

centos6 https://download.csdn.net/download/ChongDanYiQieHuiYi/12507873

cp ssh.repo /etc/yum.repos.d/ssh.repo
mv x86_64 /tmp/
yum clean all
yum install -y openssh
[root@VM_0_11_centos RPMS]# sshd -v
unknown option -- v
OpenSSH_8.3p1, OpenSSL 1.0.2k-fips  26 Jan 2017
usage: sshd [-46DdeiqTt] [-C connection_spec] [-c host_cert_file][-E log_file] [-f config_file] [-g login_grace_time][-h host_key_file] [-o option] [-p port] [-u len]

2.异常处理：

a.CRT7.0.0由于sshd升级弱算法将不采用

Key exchange failed.
No compatible key exchange method. The server supports these methods: curve25519-sha256,curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group14-sha256
No compatible hostkey. The server supports these methods: ssh-ed25519

增加配置

cat >>/etc/ssh/sshd_config <<-EOF
KexAlgorithms curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group14-sha1,diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1
EOF
systemctl restart sshd

3.安全扫描合规

4.2020-7-2 修复BUG

centos7.x-7.6登录异常及systemctl 管理失败

[root@192 ~]# tar -xf openssh8.3p1.tar
[root@192 ~]# ls
anaconda-ks.cfg  openssh8.3p1.tar  original-ks.cfg  x86_64
[root@192 ~]# mv x86_64/ /tmp/
[root@192 ~]# mv /tmp/x86_64/ssh.repo /etc/yum.repos.d/
[root@192 ~]# yum install -y openssh
Loaded plugins: langpacks, product-id, search-disabled-repos, subscription-manager
This system is not registered with an entitlement server. You can use subscription-manager to register.
ssh                                                                                                          | 2.9 kB  00:00:00
ssh/primary_db                                                                                               | 6.2 kB  00:00:00
Resolving Dependencies
--> Running transaction check
---> Package openssh.x86_64 0:7.4p1-21.el7 will be updated
--> Processing Dependency: openssh = 7.4p1-21.el7 for package: openssh-clients-7.4p1-21.el7.x86_64
--> Processing Dependency: openssh = 7.4p1-21.el7 for package: openssh-server-7.4p1-21.el7.x86_64
---> Package openssh.x86_64 0:8.3p1-1.el7 will be an update
--> Running transaction check
---> Package openssh-clients.x86_64 0:7.4p1-21.el7 will be updated
---> Package openssh-clients.x86_64 0:8.3p1-1.el7 will be an update
---> Package openssh-server.x86_64 0:7.4p1-21.el7 will be updated
---> Package openssh-server.x86_64 0:8.3p1-1.el7 will be an update
--> Finished Dependency ResolutionDependencies Resolved====================================================================================================================================Package                              Arch                        Version                            Repository                Size
====================================================================================================================================
Updating:openssh                              x86_64                      8.3p1-1.el7                        ssh                      562 k
Updating for dependencies:openssh-clients                      x86_64                      8.3p1-1.el7                        ssh                      568 kopenssh-server                       x86_64                      8.3p1-1.el7                        ssh                      411 kTransaction Summary
====================================================================================================================================
Upgrade  1 Package (+2 Dependent packages)Total download size: 1.5 M
Downloading packages:
------------------------------------------------------------------------------------------------------------------------------------
Total                                                                                               177 MB/s | 1.5 MB  00:00:00
Running transaction check
Running transaction test
Transaction test succeeded
Running transactionUpdating   : openssh-8.3p1-1.el7.x86_64                                                                                       1/6 Updating   : openssh-clients-8.3p1-1.el7.x86_64                                                                               2/6 Updating   : openssh-server-8.3p1-1.el7.x86_64                                                                                3/6 Cleanup    : openssh-server-7.4p1-21.el7.x86_64                                                                               4/6 Cleanup    : openssh-clients-7.4p1-21.el7.x86_64                                                                              5/6 Cleanup    : openssh-7.4p1-21.el7.x86_64                                                                                      6/6 Verifying  : openssh-clients-8.3p1-1.el7.x86_64                                                                               1/6 Verifying  : openssh-8.3p1-1.el7.x86_64                                                                                       2/6 Verifying  : openssh-server-8.3p1-1.el7.x86_64                                                                                3/6 Verifying  : openssh-clients-7.4p1-21.el7.x86_64                                                                              4/6 Verifying  : openssh-7.4p1-21.el7.x86_64                                                                                      5/6 Verifying  : openssh-server-7.4p1-21.el7.x86_64                                                                               6/6 Updated:openssh.x86_64 0:8.3p1-1.el7                                                                                                      Dependency Updated:openssh-clients.x86_64 0:8.3p1-1.el7                              openssh-server.x86_64 0:8.3p1-1.el7                             Complete!
[root@192 ~]# systemctl status sshd
● sshd.service - SYSV: OpenSSH server daemonLoaded: loaded (/etc/rc.d/init.d/sshd; bad; vendor preset: enabled)Active: active (running) since Thu 2020-07-02 04:31:58 PDT; 25s agoDocs: man:systemd-sysv-generator(8)Process: 31010 ExecStop=/etc/rc.d/init.d/sshd stop (code=exited, status=0/SUCCESS)Process: 31016 ExecStart=/etc/rc.d/init.d/sshd start (code=exited, status=0/SUCCESS)Main PID: 1142 (code=exited, status=0/SUCCESS)CGroup: /system.slice/sshd.service└─31024 sshd: /usr/sbin/sshd [listener] 0 of 10-100 startupsJul 02 04:31:58 192.168.1.15 systemd[1]: Stopped SYSV: OpenSSH server daemon.
Jul 02 04:31:58 192.168.1.15 systemd[1]: Starting SYSV: OpenSSH server daemon...
Jul 02 04:31:58 192.168.1.15 sshd[31016]: ssh-keygen: generating new host keys: DSA
Jul 02 04:31:58 192.168.1.15 sshd[31016]: Starting sshd:[  OK  ]
Jul 02 04:31:58 192.168.1.15 systemd[1]: Can't open PID file /var/run/sshd.pid (yet?) after start: No such file or directory
Jul 02 04:31:58 192.168.1.15 systemd[1]: Started SYSV: OpenSSH server daemon.
Jul 02 04:31:59 192.168.1.15 sshd[31024]: Server listening on 0.0.0.0 port 22.
Jul 02 04:31:59 192.168.1.15 sshd[31024]: Server listening on :: port 22.
Jul 02 04:32:03 192.168.1.15 sshd[31026]: Accepted password for root from 192.168.1.6 port 11657 ssh2

6.安装了之前版本的修复安装下面步骤修复一下就行

/usr/bin/cat >/etc/pam.d/sshd<<EOF
#%PAM-1.0
auth       required     pam_sepermit.so
auth       substack     password-auth
auth       include      postlogin
account    required     pam_nologin.so
account    include      password-auth
password   include      password-auth
# pam_selinux.so close should be the first session rule
session    required     pam_selinux.so close
session    required     pam_loginuid.so
# pam_selinux.so open should only be followed by sessions to be executed in the user context
session    required     pam_selinux.so open env_params
session    optional     pam_keyinit.so force revoke
session    include      password-auth
session    include      postlogin
EOF
[ -f /etc/ssh/ssh_host_rsa_key ] && /usr/bin/chmod 600 /etc/ssh/ssh_host_rsa_key
[ -f /etc/ssh/ssh_host_ecdsa_key ] && /usr/bin/chmod 600 /etc/ssh/ssh_host_ecdsa_key
[ -f /etc/ssh/ssh_host_ed25519_key ] && /usr/bin/chmod 600 /etc/ssh/ssh_host_ed25519_key代码复制粘贴运行之后
1.vim /etc/ssh/sshd_config
PermitRootLogin yes
UsePAM yes 2.重启sshd
systemctl restart sshd

注意事项:

目前测试centos 7.2至7.7版本没有异常，有问题及时发给我修复bug

7.0及7.1如果想使用想先挂载7.2及ssh.repo 镜像源，然后升级openssh

1.会覆盖原来的配置文件/etc/ssh/sshd_config 注意保存

2.默认root可以登录

vim /etc/ssh/sshd_config

#注释了就需要从普通用户跳转登录了

#PermitRootLogin yes

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