IBM HTTPServer - HTTP 메소드 차단

WebServer 메소드 차단

WebServer 메소드 차단 방법

  • Test OS : CentOS 7.2
  • Test Version : IBM HTTPServer v8.5

IBM HTTPServer 에서 보안상의 이유로 HTTP 메소드 차단 요청이 들어와 테스트한 내용 정리.

  • IHS의 경우 apache 기반이기 때문에 해당 설정은 apache에서도 같이 적용이 가능.

httpd.conf 파일 수정

#GET, POST를 제외한 메소드 제한
<Directory />
Options FollowSymLinks
AllowOverride None
 <LimitExcept GET POST>
 Order allow,deny
 Deny from all
 </LimitExcept>
</Directory>

보통 디렉토리 속성안에 넣어서 사용하지만 디렉토리 속성을 안사용할경우 로케이션을 사용.

<Location "/*">
  <LimitExcept GET POST>
  Order allow,deny
  Deny from all
  </LimitExcept>
</Location>

다른 방안으로 rewrite 사용하는 방법도 있다.

LoadModule rewrite_module modules/mod_rewrite.so
<IfModule mod_rewrite.c>
 RewriteEngine On
 # GET, POST를 제외하고 모두 405 페이지로 이동
 RewriteCond %{REQUEST_METHOD} !^(GET|POST)
 RewriteRule .* - [R=405,L]
</IfModule>

메소드 차단 테스트로는 해당 메소드 파일을 만들어서 요청하는 방법도 있지만, 간단하게 telnet으로 테스트 가능.

$telnet {domain_address} 80
OPTIONS http://{domain_address}/ HTTP/1.0
OPTIONS http://google.com/ HTTP/1.0
Enter Enter

#모든 메소드 허용의 경우
HTTP/1.1 200 OK
Date: Wed, 04 Jul 2018 01:44:40 GMT
Allow: GET,HEAD,POST,OPTIONS
Content-Length: 0
Connection: close
Content-Type: text/html

#메소드가 차단된 경우
HTTP/1.0 405 Method Not Allowed
Allow: GET, HEAD
#
HTTP/1.1 403 Forbidden
Allow: GET, HEAD

위와 같은 방법으로 안대는 경우

web.xml에 secutity-constraint 속성으로 해당 메소드 제한

#web.xml 아래와 같이 메소드 제한 설정
<security-constraint>
<web-resource-collection>
<web-resource-name></web-resource-name>
<url-pattern>/*</url-pattern>
<http-method>HEAD</http-method>
<http-method>DELETE</http-method>
<http-method>PUT</http-method>
<http-method>OPTIONS</http-method>
</web-resource-collection>
</security-constraint>




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IBM HTTPServer version info

IHS v8.5, v9.0 apache version Info


PS E:\app\was\HTTPServer\bin> .\apache.exe -V
Server version: IBM_HTTP_Server/8.5.5.0 (Win32)
Apache version: 2.2.8 (with additional fixes)
Server built:   Feb 20 2013 13:50:05
Build level:    IHS90/webIHS1307.02
Server's Module Magic Number: 20051115:21
Server loaded:  APR 1.2.12, APR-Util 1.2.12
Compiled using: APR 1.2.12, APR-Util 1.2.12
Architecture:   32-bit
Server MPM:     WinNT
  threaded:     yes (fixed thread count)
    forked:     no
Server compiled with....
 -D APACHE_MPM_DIR="server/mpm/winnt"
 -D APR_HAS_SENDFILE
 -D APR_HAS_MMAP
 -D APR_HAVE_IPV6 (IPv4-mapped addresses disabled)
 -D APR_HAS_OTHER_CHILD
 -D AP_HAVE_RELIABLE_PIPED_LOGS
 -D DYNAMIC_MODULE_LIMIT=128
 -D HTTPD_ROOT="/apache"
 -D DEFAULT_SCOREBOARD="logs/apache_runtime_status"
 -D DEFAULT_ERRORLOG="logs/error.log"
 -D AP_TYPES_CONFIG_FILE="conf/mime.types"
 -D SERVER_CONFIG_FILE="conf/httpd.conf"
Apache vulnerability fixes included:
  CVE-2005-3352  CVE-2005-3357  CVE-2006-3918  CVE-2006-3747
  CVE-2007-4465  CVE-2007-1862  CVE-2006-5752  CVE-2007-3304
  CVE-2007-1863  CVE-2007-3847  CVE-2008-0005  CVE-2007-5000
  CVE-2007-6388  CVE-2007-6422  CVE-2007-6421  CVE-2006-7225
  CVE-2007-6420  CVE-2008-2364  CVE-2008-2939  CVE-2009-1195
  CVE-2009-1955  CVE-2009-0023  CVE-2009-1956  CVE-2009-1890
  CVE-2009-1891  CVE-2009-2412  CVE-2009-1191  CVE-2009-3094
  CVE-2009-3095  CVE-2009-3555  CVE-2010-0408  CVE-2010-0434
  CVE-2010-1452  CVE-2010-1623  CVE-2009-3560  CVE-2009-3720
  CVE-2011-0419  CVE-2011-1928  CVE-2011-3192  CVE-2011-3348
  CVE-2011-3368  CVE-2011-3639  CVE-2011-4317  CVE-2011-3607
  CVE-2012-0717  CVE-2012-0031  CVE-2012-0053  CVE-2012-0883
  CVE-2012-2190  CVE-2012-2191  CVE-2012-2687  CVE-2012-4558
  CVE-2012-3499  CVE-2012-4557  


PS E:\software\IBM\HTTPServer9\bin> .\apache.exe -V
Server version: IBM_HTTP_Server/9.0.0.0-PI56034 (Win32)
Apache version: 2.4.12 (with additional fixes)
Server built:   Apr 18 2016 20:28:53
Build level:    RIHSX.IHS/webIHS1616.01
Server's Module Magic Number: 20120211:57
Server loaded:  APR 1.5.1, APR-UTIL 1.5.2
Compiled using: APR 1.5.1, APR-UTIL 1.5.2
Architecture:   32-bit
Operating System: Windows
Server MPM:     WinNT
  threaded:     yes (fixed thread count)
    forked:     no
Server compiled with....
 -D APR_HAS_SENDFILE
 -D APR_HAS_MMAP
 -D APR_HAVE_IPV6 (IPv4-mapped addresses disabled)
 -D APR_HAS_OTHER_CHILD
 -D AP_HAVE_RELIABLE_PIPED_LOGS
 -D DYNAMIC_MODULE_LIMIT=256
 -D HTTPD_ROOT="/apache"
 -D DEFAULT_PIDLOG="logs/httpd.pid"
 -D DEFAULT_SCOREBOARD="logs/apache_runtime_status"
 -D DEFAULT_ERRORLOG="logs/error.log"
 -D AP_TYPES_CONFIG_FILE="conf/mime.types"
 -D SERVER_CONFIG_FILE="conf/httpd.conf"
Apache vulnerability fixes included:
  CVE-2009-1191  CVE-2009-1890  CVE-2009-3094  CVE-2009-3095
  CVE-2010-0434  CVE-2010-0425  CVE-2010-0408  CVE-2009-3555
  CVE-2010-1452  CVE-2010-1623  CVE-2011-3368  CVE-2011-3607
  CVE-2011-3192  CVE-2011-3348  CVE-2011-4317  CVE-2012-0021
  CVE-2012-0031  CVE-2012-0053  CVE-2012-0883  CVE-2012-2687
  CVE-2012-3502  CVE-2012-4558  CVE-2012-3499  CVE-2013-2249
  CVE-2013-1896  CVE-2013-4352  CVE-2013-6438  CVE-2014-0098
  CVE-2014-0963  CVE-2014-0231  CVE-2014-0118  CVE-2014-0226
  CVE-2014-3523  CVE-2014-0117  CVE-2013-5704  CVE-2014-8109
  CVE-2014-3581  CVE-2014-3583  CVE-2015-0253  CVE-2015-3185
  CVE-2015-3183  CVE-2015-1829  CVE-2014-8730  CVE-2015-0228
  CVE-2015-4947  CVE-2015-1283  CVE-2015-7420  CVE-2016-0201

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