Nginx目前爆出在HTTP/2 和 MP4 模块中存在安全漏洞,容易被DOS攻击。
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Nginx官方于11月6日发布了新版本,用于修复影响 1.15.6, 1.14.1 之前版本的多个安全问题,被发现的安全问题有一种这样的情况 —— 允许潜在的攻击者触发拒绝服务(DoS)状态并访问敏感的信息,见官方公告:http://nginx.org/en/security_advisories.html
低版本升级到目前最新版nginx-1.14.1方法步骤如下:
1、查看原来安装nginx的版本以及编译的参数:

[root@xshell ~]# /usr/local/nginx/sbin/nginx -V
nginx version: nginx/1.14.0
built by gcc 4.8.5 20150623 (Red Hat 4.8.5-28) (GCC) 
built with OpenSSL 1.0.2o  27 Mar 2018
TLS SNI support enabled
configure arguments: --user=www --group=www --prefix=/usr/local/nginx --with-http_stub_status_module --with-http_ssl_module --with-http_v2_module --with-http_gzip_static_module --with-http_sub_module --with-stream --with-stream_ssl_module --with-openssl=/data/lnmp1.5-full/src/openssl-1.0.2o

2、下载nginx最新稳定版本

wget http://nginx.org/download/nginx-1.14.1.tar.gz

3、解压ningx压缩包并编译make

tar xvf nginx-1.14.1.tar.gz
cd nginx-1.14.1
./configure --user=www --group=www --prefix=/usr/local/nginx --with-http_stub_status_module --with-http_ssl_module --with-http_v2_module --with-http_gzip_static_module --with-http_sub_module --with-stream --with-stream_ssl_module --with-openssl=/data/lnmp1.5-full/src/openssl-1.0.2o
make

4、make编译完后会在安装目录下生成一个objs目录且在该目录下有一个nginx执行文件

[root@xshell nginx-1.14.1]# ll
total 756
-rw-r--r-- 1 www  www  287441 Nov  6 21:52 CHANGES
-rw-r--r-- 1 www  www  438114 Nov  6 21:52 CHANGES.ru
-rw-r--r-- 1 www  www    1397 Nov  6 21:52 LICENSE
-rw-r--r-- 1 root root    376 Nov  9 10:56 Makefile
-rw-r--r-- 1 www  www      49 Nov  6 21:52 README
drwxr-xr-x 6 www  www    4096 Nov  9 10:55 auto
drwxr-xr-x 2 www  www    4096 Nov  9 10:55 conf
-rwxr-xr-x 1 www  www    2502 Nov  6 21:52 configure
drwxr-xr-x 4 www  www    4096 Nov  9 10:55 contrib
drwxr-xr-x 2 www  www    4096 Nov  9 10:55 html
drwxr-xr-x 2 www  www    4096 Nov  9 10:55 man
drwxr-xr-x 3 root root   4096 Nov  9 11:00 objs
drwxr-xr-x 9 www  www    4096 Nov  9 10:55 src
[root@xshell nginx-1.14.1]# ll objs/
total 10348
-rw-r--r-- 1 root root    52252 Nov  9 10:56 Makefile
-rw-r--r-- 1 root root    17763 Nov  9 10:55 autoconf.err
-rwxr-xr-x 1 root root 10394568 Nov  9 11:00 nginx
-rw-r--r-- 1 root root     5341 Nov  9 11:00 nginx.8
-rw-r--r-- 1 root root     7555 Nov  9 10:56 ngx_auto_config.h
-rw-r--r-- 1 root root      657 Nov  9 10:55 ngx_auto_headers.h
-rw-r--r-- 1 root root     8401 Nov  9 10:55 ngx_modules.c
-rw-r--r-- 1 root root    89712 Nov  9 11:00 ngx_modules.o
drwxr-xr-x 9 root root     4096 Nov  9 10:55 src

5、备份老的nginx文件,复制新文件

mv /usr/local/nginx/sbin/nginx /usr/local/nginx/sbin/nginx_bak
cp objs/nginx /usr/local/nginx/sbin/

6、检测配置文件是否正常

/usr/local/nginx/sbin/nginx -t
nginx: the configuration file /usr/local/nginx/conf/nginx.conf syntax is ok
nginx: configuration file /usr/local/nginx/conf/nginx.conf test is successful

7、使用make upgrade替换老的nginx进程

make upgrade
/usr/local/nginx/sbin/nginx -t
nginx: the configuration file /usr/local/nginx/conf/nginx.conf syntax is ok
nginx: configuration file /usr/local/nginx/conf/nginx.conf test is successful
kill -USR2 `cat /usr/local/nginx/logs/nginx.pid`
sleep 1
test -f /usr/local/nginx/logs/nginx.pid.oldbin
kill -QUIT `cat /usr/local/nginx/logs/nginx.pid.oldbin`

8、执行/usr/local/nginx2/sbin/nginx -V查看nginx最新的版本及编译的参数

/usr/local/nginx/sbin/nginx -V
nginx version: nginx/1.14.1
built by gcc 4.8.5 20150623 (Red Hat 4.8.5-28) (GCC) 
built with OpenSSL 1.0.2o  27 Mar 2018
TLS SNI support enabled
configure arguments: --user=www --group=www --prefix=/usr/local/nginx --with-http_stub_status_module --with-http_ssl_module --with-http_v2_module --with-http_gzip_static_module --with-http_sub_module --with-stream --with-stream_ssl_module --with-openssl=/data/lnmp1.5-full/src/openssl-1.0.2o

9、重新reload服务

/usr/local/nginx/sbin/nginx -s reload

至此平滑升级完成

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