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SSH/SSL 源码编译安装简易操作说明

安全加固需求,由于某盟扫描系统主机有SSL系列漏洞,客户要求必须修复;
解决方案:将SSH/SSL升级到最新版本,删除SSL旧版本(实测不删除旧版本某盟扫描无法通过)。
当前版本:OpenSSH_5.3p1, OpenSSL 1.0.1e-fips
当前最新版本:OpenSSH_7.3p1, OpenSSL 1.0.2h

  • 1.查看SSH/SSL当前版本
  • 2.下载最新的SSH/SSL
  • 3.源码编译安装SSL
  • 4.源码编译安装SSH
  • 5.删除SSL旧版本
  • 6.写在后面

1.查看SSH/SSL当前版本

查看SSH/SSL当前版本:
ssh -V
openssl version

[root@test0823 ~]# ssh -V
OpenSSH_5.3p1, OpenSSL 1.0.1e-fips 11 Feb 2013

[root@test0823 ssh]# openssl version
OpenSSL 1.0.1e-fips 11 Feb 2013

备份ssh配置文件:
tar zcvf /etc/ssh.tar.gz /etc/ssh/

[root@test0823 ~]# tar zcvf /etc/ssh.tar.gz /etc/ssh/  
ssh/  
ssh/ssh_host_dsa_key.pub  
ssh/ssh_host_rsa_key.pub  
ssh/ssh_host_rsa_key  
ssh/sshd_config  
ssh/ssh_config  
ssh/moduli  
ssh/ssh_host_dsa_key  
ssh/ssh_host_key.pub  
ssh/ssh_host_key  

2.下载最新的SSH/SSL

目前最新版本:
OpenSSH_7.3p1, OpenSSL 1.0.2h
本次安装介质到Linux公社资源站下载:

——————————————分割线——————————————

免费下载地址在 http://linux.linuxidc.com/

用户名与密码都是www.linuxidc.com

具体下载目录在 /2016年资料/9月/22日/SSH-SSL源码编译安装简易操作说明/

下载方法见 http://www.linuxidc.com/Linux/2013-07/87684.htm

——————————————分割线——————————————

SSH/SSL安装配置参考:
SSL安装:
参考 http://www.linuxfromscratch.org/blfs/view/svn/postlfs/openssl.html
SSH安装:
参考 http://www.linuxfromscratch.org/blfs/view/svn/postlfs/openssh.html

3.源码编译安装SSL

本次测试所有源码包均默认上传到服务器的/root目录下。
需要先安装SSL,再安装SSH

3.1 解压SSL源码包

[root@test0823 ~]# tar -zxvf openssl-1.0.2h.tar.gz 
[root@test0823 ~]# cd openssl-1.0.2h

3.2 配置并编译

复制下面的命令执行:

./config --prefix=/usr         \
         --openssldir=/etc/ssl \
         --libdir=lib          \
         shared                \
         zlib-dynamic &&
make depend           &&
make

操作如下:

[root@test0823 openssl-1.0.2h]# ./config --prefix=/usr         \
>          --openssldir=/etc/ssl \
>          --libdir=lib          \
>          shared                \
>          zlib-dynamic &&
> make depend           &&
> make

3.3 安装SSL

复制下面的命令执行:

make MANDIR=/usr/share/man MANSUFFIX=ssl install &&
install -dv -m755 /usr/share/doc/openssl-1.0.2h  &&
cp -vfr doc/*     /usr/share/doc/openssl-1.0.2h

操作如下:

[root@test0823 openssl-1.0.2h]# make MANDIR=/usr/share/man MANSUFFIX=ssl install &&
> install -dv -m755 /usr/share/doc/openssl-1.0.2h  &&
> cp -vfr doc/*     /usr/share/doc/openssl-1.0.2h

3.4 验证SSL版本

openssl version

操作如下:

[root@test0823 openssl-1.0.2h]# openssl version
OpenSSL 1.0.2h  3 May 2016
[root@test0823 openssl-1.0.2h]# ssh -V
OpenSSH_5.3p1, OpenSSL 1.0.1e-fips 11 Feb 2013

4.源码编译安装SSH

4.1 解压SSH源码包

[root@test0823 ~]# tar -zxvf openssh-7.3p1.tar.gz 
[root@test0823 ~]# cd openssh-7.3p1

4.2 配置

4.2.1 配置前准备

复制下面的命令执行:

install  -v -m700 -d /var/lib/sshd &&
chown    -v root:sys /var/lib/sshd &&

groupadd -g 50 sshd        &&
useradd  -c 'sshd PrivSep' \
         -d /var/lib/sshd  \
         -g sshd           \
         -s /bin/false     \
         -u 50 sshd

操作如下:

[root@test0823 openssh-7.3p1]# install  -v -m700 -d /var/lib/sshd &&
> chown    -v root:sys /var/lib/sshd &&
> 
> groupadd -g 50 sshd        &&
> useradd  -c 'sshd PrivSep' \
>          -d /var/lib/sshd  \
>          -g sshd           \
>          -s /bin/false     \
>          -u 50 sshd

4.2.2 配置并编译

复制下面的命令执行:

./configure --prefix=/usr                     \
            --sysconfdir=/etc/ssh             \
            --with-md5-passwords              \
            --with-privsep-path=/var/lib/sshd &&
make

操作如下:

[root@test0823 openssh-7.3p1]# ./configure --prefix=/usr                     \
>             --sysconfdir=/etc/ssh             \
>             --with-md5-passwords              \
>             --with-privsep-path=/var/lib/sshd &&
> make

4.3 安装SSH

复制下面的命令执行:

make install &&
install -v -m755    contrib/ssh-copy-id /usr/bin     &&

install -v -m644    contrib/ssh-copy-id.1 \
                    /usr/share/man/man1              &&
install -v -m755 -d /usr/share/doc/openssh-7.3p1     &&
install -v -m644    INSTALL LICENCE OVERVIEW README* \
                    /usr/share/doc/openssh-7.3p1

操作如下:

[root@test0823 openssh-7.3p1]# make install &&
> install -v -m755    contrib/ssh-copy-id /usr/bin     &&
> 
> install -v -m644    contrib/ssh-copy-id.1 \
>                     /usr/share/man/man1              &&
> install -v -m755 -d /usr/share/doc/openssh-7.3p1     &&
> install -v -m644    INSTALL LICENCE OVERVIEW README* \
>                     /usr/share/doc/openssh-7.3p1

4.4 验证SSH版本

[root@test0823 openssh-7.3p1]# ssh -V
OpenSSH_7.3p1, OpenSSL 1.0.2h  3 May 2016

4.5 重启sshd服务

将之前的sshd重命名备份,做一个sshd的软连接:

mv /usr/sbin/sshd /usr/sbin/sshd.OFF
ln -s /root/openssh-7.3p1/sshd /usr/sbin/sshd

使用 service sshd restart 重启一下服务

[root@test0823 openssh-7.3p1]# service sshd restart
Stopping sshd: [  OK  ]
Starting sshd: /etc/ssh/sshd_config line 81: Unsupported option GSSAPIAuthentication
/etc/ssh/sshd_config line 83: Unsupported option GSSAPICleanupCredentials
/etc/ssh/sshd_config line 97: Unsupported option UsePAM
[  OK  ]

上面的报错并不影响sshd正常启动,为了不再显示上述提示,可以注释掉相关配置行:
vi /etc/ssh/sshd_config
注释掉 81,83,97 三行。

再次重启sshd服务就不会有那三行的提示报错。

允许root用户ssh登录(默认可能就是允许,如果不允许,可以在文件末尾追加下面的一行配置到配置文件,或者直接vi编辑修改)

echo "PermitRootLogin yes" >> /etc/ssh/sshd_config

5.删除SSL旧版本

之前没有删除旧版本的SSL,SSH是因为不了解相关联的程序,
但是最后扫描发现如果不删除旧版本的SSL,某盟的扫描依然会扫出SSL的系列漏洞。

查看rpm安装的openssl相关包:

rpm -qa|grep openssl

对旧版本的SSL(这里是openssl-1.0.1e-42.el6.x86_64)进行删除:
rpm -e openssl-1.0.1e-42.el6.x86_64
直接尝试删除会提示如下库文件的依赖:

[root@test0823 ~]# rpm -e openssl-1.0.1e-42.el6.x86_64
error: Failed dependencies:
        libcrypto.so.10()(64bit) is needed by (installed) qt-1:4.6.2-28.el6_5.x86_64
        libcrypto.so.10()(64bit) is needed by (installed) libarchive-2.8.3-4.el6_2.x86_64
        libcrypto.so.10()(64bit) is needed by (installed) libssh2-1.4.2-1.el6_6.1.x86_64
        libcrypto.so.10()(64bit) is needed by (installed) wget-1.12-5.el6_6.1.x86_64
        libcrypto.so.10()(64bit) is needed by (installed) wpa_supplicant-1:0.7.3-6.el6.x86_64
        libcrypto.so.10()(64bit) is needed by (installed) bind-libs-32:9.8.2-0.37.rc1.el6.x86_64
        libcrypto.so.10()(64bit) is needed by (installed) bind-utils-32:9.8.2-0.37.rc1.el6.x86_64
        libcrypto.so.10()(64bit) is needed by (installed) mysql-libs-5.1.73-5.el6_6.x86_64
        libcrypto.so.10()(64bit) is needed by (installed) fipscheck-1.2.0-7.el6.x86_64
        libcrypto.so.10()(64bit) is needed by (installed) httpd-tools-2.2.15-45.el6.CentOS.x86_64
        libcrypto.so.10()(64bit) is needed by (installed) cyrus-sasl-md5-2.1.23-15.el6_6.2.x86_64
        libcrypto.so.10()(64bit) is needed by (installed) gnome-vfs2-2.24.2-6.el6.x86_64
        libcrypto.so.10()(64bit) is needed by (installed) ptlib-2.6.5-3.el6.x86_64
        libcrypto.so.10()(64bit) is needed by (installed) opal-3.6.6-4.el6.x86_64
        libcrypto.so.10()(64bit) is needed by (installed) Python-libs-2.6.6-64.el6.x86_64
        libcrypto.so.10()(64bit) is needed by (installed) python-ldap-0:2.3.10-1.el6.x86_64
        libcrypto.so.10()(64bit) is needed by (installed) pyOpenSSL-0.13.1-2.el6.x86_64
        libcrypto.so.10()(64bit) is needed by (installed) net-snmp-libs-1:5.5-54.el6.x86_64
        libcrypto.so.10()(64bit) is needed by (installed) evolution-data-server-2.32.3-23.el6.x86_64
        libcrypto.so.10()(64bit) is needed by (installed) gstreamer-plugins-bad-free-0.10.19-3.el6_5.x86_64
        libcrypto.so.10()(64bit) is needed by (installed) xorg-x11-server-Xorg-1.15.0-36.el6.centos.x86_64
        libcrypto.so.10()(64bit) is needed by (installed) hplip-libs-3.14.6-3.el6.x86_64
        libcrypto.so.10()(64bit) is needed by (installed) ntpdate-4.2.6p5-5.el6.centos.x86_64
        libcrypto.so.10()(64bit) is needed by (installed) ntp-4.2.6p5-5.el6.centos.x86_64
        libcrypto.so.10()(64bit) is needed by (installed) certmonger-0.77.5-1.el6.x86_64
        libcrypto.so.10()(64bit) is needed by (installed) cyrus-sasl-2.1.23-15.el6_6.2.x86_64
        libcrypto.so.10()(64bit) is needed by (installed) postfix-2:2.6.6-6.el6_5.x86_64
        libcrypto.so.10()(64bit) is needed by (installed) hpijs-1:3.14.6-3.el6.x86_64
        libcrypto.so.10()(64bit) is needed by (installed) ekiga-3.2.6-4.el6.x86_64
        libcrypto.so.10()(64bit) is needed by (installed) gnome-vfs2-smb-2.24.2-6.el6.x86_64
        libcrypto.so.10()(64bit) is needed by (installed) tcpdump-14:4.0.0-5.20090921gitdf3cb4.2.el6.x86_64
        libcrypto.so.10()(64bit) is needed by (installed) vsftpd-2.2.2-14.el6.x86_64
        libcrypto.so.10()(64bit) is needed by (installed) openssh-5.3p1-111.el6.x86_64
        libcrypto.so.10()(64bit) is needed by (installed) openssh-server-5.3p1-111.el6.x86_64
        libcrypto.so.10()(64bit) is needed by (installed) openssh-clients-5.3p1-111.el6.x86_64
        libcrypto.so.10(OPENSSL_1.0.1)(64bit) is needed by (installed) pyOpenSSL-0.13.1-2.el6.x86_64
        libcrypto.so.10(OPENSSL_1.0.1)(64bit) is needed by (installed) net-snmp-libs-1:5.5-54.el6.x86_64
        libcrypto.so.10(OPENSSL_1.0.1)(64bit) is needed by (installed) ntpdate-4.2.6p5-5.el6.centos.x86_64
        libcrypto.so.10(OPENSSL_1.0.1)(64bit) is needed by (installed) ntp-4.2.6p5-5.el6.centos.x86_64
        libcrypto.so.10(OPENSSL_1.0.1)(64bit) is needed by (installed) postfix-2:2.6.6-6.el6_5.x86_64
        libcrypto.so.10(OPENSSL_1.0.1)(64bit) is needed by (installed) openssh-5.3p1-111.el6.x86_64
        libcrypto.so.10(OPENSSL_1.0.1)(64bit) is needed by (installed) openssh-server-5.3p1-111.el6.x86_64
        libcrypto.so.10(OPENSSL_1.0.1)(64bit) is needed by (installed) openssh-clients-5.3p1-111.el6.x86_64
        libcrypto.so.10(OPENSSL_1.0.1_EC)(64bit) is needed by (installed) certmonger-0.77.5-1.el6.x86_64
        libcrypto.so.10(OPENSSL_1.0.1_EC)(64bit) is needed by (installed) postfix-2:2.6.6-6.el6_5.x86_64
        libcrypto.so.10(OPENSSL_1.0.1_EC)(64bit) is needed by (installed) openssh-5.3p1-111.el6.x86_64
        libcrypto.so.10(OPENSSL_1.0.1_EC)(64bit) is needed by (installed) openssh-server-5.3p1-111.el6.x86_64
        libcrypto.so.10(OPENSSL_1.0.1_EC)(64bit) is needed by (installed) openssh-clients-5.3p1-111.el6.x86_64
        libcrypto.so.10(libcrypto.so.10)(64bit) is needed by (installed) qt-1:4.6.2-28.el6_5.x86_64
        libcrypto.so.10(libcrypto.so.10)(64bit) is needed by (installed) libssh2-1.4.2-1.el6_6.1.x86_64
        libcrypto.so.10(libcrypto.so.10)(64bit) is needed by (installed) wget-1.12-5.el6_6.1.x86_64
        libcrypto.so.10(libcrypto.so.10)(64bit) is needed by (installed) wpa_supplicant-1:0.7.3-6.el6.x86_64
        libcrypto.so.10(libcrypto.so.10)(64bit) is needed by (installed) bind-libs-32:9.8.2-0.37.rc1.el6.x86_64
        libcrypto.so.10(libcrypto.so.10)(64bit) is needed by (installed) mysql-libs-5.1.73-5.el6_6.x86_64
        libcrypto.so.10(libcrypto.so.10)(64bit) is needed by (installed) httpd-tools-2.2.15-45.el6.centos.x86_64
        libcrypto.so.10(libcrypto.so.10)(64bit) is needed by (installed) cyrus-sasl-md5-2.1.23-15.el6_6.2.x86_64
        libcrypto.so.10(libcrypto.so.10)(64bit) is needed by (installed) python-libs-2.6.6-64.el6.x86_64
        libcrypto.so.10(libcrypto.so.10)(64bit) is needed by (installed) pyOpenSSL-0.13.1-2.el6.x86_64
        libcrypto.so.10(libcrypto.so.10)(64bit) is needed by (installed) net-snmp-libs-1:5.5-54.el6.x86_64
        libcrypto.so.10(libcrypto.so.10)(64bit) is needed by (installed) gstreamer-plugins-bad-free-0.10.19-3.el6_5.x86_64
        libcrypto.so.10(libcrypto.so.10)(64bit) is needed by (installed) xorg-x11-server-Xorg-1.15.0-36.el6.centos.x86_64
        libcrypto.so.10(libcrypto.so.10)(64bit) is needed by (installed) ntpdate-4.2.6p5-5.el6.centos.x86_64
        libcrypto.so.10(libcrypto.so.10)(64bit) is needed by (installed) ntp-4.2.6p5-5.el6.centos.x86_64
        libcrypto.so.10(libcrypto.so.10)(64bit) is needed by (installed) certmonger-0.77.5-1.el6.x86_64
        libcrypto.so.10(libcrypto.so.10)(64bit) is needed by (installed) cyrus-sasl-2.1.23-15.el6_6.2.x86_64
        libcrypto.so.10(libcrypto.so.10)(64bit) is needed by (installed) postfix-2:2.6.6-6.el6_5.x86_64
        libcrypto.so.10(libcrypto.so.10)(64bit) is needed by (installed) tcpdump-14:4.0.0-5.20090921gitdf3cb4.2.el6.x86_64
        libcrypto.so.10(libcrypto.so.10)(64bit) is needed by (installed) vsftpd-2.2.2-14.el6.x86_64
        libcrypto.so.10(libcrypto.so.10)(64bit) is needed by (installed) openssh-5.3p1-111.el6.x86_64
        libcrypto.so.10(libcrypto.so.10)(64bit) is needed by (installed) openssh-server-5.3p1-111.el6.x86_64
        libcrypto.so.10(libcrypto.so.10)(64bit) is needed by (installed) openssh-clients-5.3p1-111.el6.x86_64
        libssl.so.10()(64bit) is needed by (installed) qt-1:4.6.2-28.el6_5.x86_64
        libssl.so.10()(64bit) is needed by (installed) libssh2-1.4.2-1.el6_6.1.x86_64
        libssl.so.10()(64bit) is needed by (installed) wget-1.12-5.el6_6.1.x86_64
        libssl.so.10()(64bit) is needed by (installed) wpa_supplicant-1:0.7.3-6.el6.x86_64
        libssl.so.10()(64bit) is needed by (installed) mysql-libs-5.1.73-5.el6_6.x86_64
        libssl.so.10()(64bit) is needed by (installed) httpd-tools-2.2.15-45.el6.centos.x86_64
        libssl.so.10()(64bit) is needed by (installed) gnome-vfs2-2.24.2-6.el6.x86_64
        libssl.so.10()(64bit) is needed by (installed) ptlib-2.6.5-3.el6.x86_64
        libssl.so.10()(64bit) is needed by (installed) opal-3.6.6-4.el6.x86_64
        libssl.so.10()(64bit) is needed by (installed) python-libs-2.6.6-64.el6.x86_64
        libssl.so.10()(64bit) is needed by (installed) python-ldap-0:2.3.10-1.el6.x86_64
        libssl.so.10()(64bit) is needed by (installed) pyOpenSSL-0.13.1-2.el6.x86_64
        libssl.so.10()(64bit) is needed by (installed) evolution-data-server-2.32.3-23.el6.x86_64
        libssl.so.10()(64bit) is needed by (installed) gstreamer-plugins-bad-free-0.10.19-3.el6_5.x86_64
        libssl.so.10()(64bit) is needed by (installed) postfix-2:2.6.6-6.el6_5.x86_64
        libssl.so.10()(64bit) is needed by (installed) ekiga-3.2.6-4.el6.x86_64
        libssl.so.10()(64bit) is needed by (installed) gnome-vfs2-smb-2.24.2-6.el6.x86_64
        libssl.so.10()(64bit) is needed by (installed) vsftpd-2.2.2-14.el6.x86_64
        libssl.so.10(libssl.so.10)(64bit) is needed by (installed) qt-1:4.6.2-28.el6_5.x86_64
        libssl.so.10(libssl.so.10)(64bit) is needed by (installed) wget-1.12-5.el6_6.1.x86_64
        libssl.so.10(libssl.so.10)(64bit) is needed by (installed) wpa_supplicant-1:0.7.3-6.el6.x86_64
        libssl.so.10(libssl.so.10)(64bit) is needed by (installed) mysql-libs-5.1.73-5.el6_6.x86_64
        libssl.so.10(libssl.so.10)(64bit) is needed by (installed) httpd-tools-2.2.15-45.el6.centos.x86_64
        libssl.so.10(libssl.so.10)(64bit) is needed by (installed) python-libs-2.6.6-64.el6.x86_64
        libssl.so.10(libssl.so.10)(64bit) is needed by (installed) pyOpenSSL-0.13.1-2.el6.x86_64
        libssl.so.10(libssl.so.10)(64bit) is needed by (installed) postfix-2:2.6.6-6.el6_5.x86_64
        libssl.so.10(libssl.so.10)(64bit) is needed by (installed) vsftpd-2.2.2-14.el6.x86_64
        openssl is needed by (installed) postfix-2:2.6.6-6.el6_5.x86_64

记录好依赖的这两个库文件

libcrypto.so.10
libssl.so.10

然后忽略依赖删除:

rpm -e --nodeps openssl-1.0.1e-42.el6.x86_64

做新的软连接映射:

[root@test0823 openssl-1.0.2h]# ln -s /root/openssl-1.0.2h/libssl.so.1.0.0 /usr/lib64/libssl.so.10
[root@test0823 openssl-1.0.2h]# ln -s /root/openssl-1.0.2h/libcrypto.so.1.0.0 /usr/lib64/libcrypto.so.10

如果是最后删除的openssl,那么还需要注意openssl软连接的情况,如下:

[root@test0823 apps]# ln -s /root/openssl-1.0.2h/apps/openssl /usr/bin/openssl

然后再次扫描已经没有SSL相关漏洞了。

6.写在后面

我的专业不是SA,对Linux的编译安装了解也不多,所以这个加固过程中不免有所纰漏或错误,欢迎内行指出供大家一起参考学习。
另外感谢网友:游荡 早期提供给我的ssh安装说明参考。
感谢www.linuxfromscratch.org网站提供的SSH/SSL安装操作说明。

下面关于SSH相关的文章您也可能喜欢,不妨参考下:

Ubuntu 下配置 SSH服务全过程及问题解决 http://www.linuxidc.com/Linux/2011-09/42775.htm

Ubuntu 14.04 下安装Samba 及SSH 服务端的方法 http://www.linuxidc.com/Linux/2015-01/111971.htm

SSH服务远程访问Linux服务器登陆慢 http://www.linuxidc.com/Linux/2011-08/39742.htm

提高Ubuntu的SSH登陆认证速度的办法 http://www.linuxidc.com/Linux/2014-09/106810.htm

开启SSH服务让Android手机远程访问 Ubuntu 14.04  http://www.linuxidc.com/Linux/2014-09/106809.htm

如何为Linux系统中的SSH添加双重认证 http://www.linuxidc.com/Linux/2014-08/105998.htm

在 Linux 中为非 SSH 用户配置 SFTP 环境 http://www.linuxidc.com/Linux/2014-08/105865.htm

Linux 上SSH 服务的配置和管理 http://www.linuxidc.com/Linux/2014-06/103627.htm

本文永久更新链接地址:http://www.linuxidc.com/Linux/2016-09/135433.htm

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