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 Topic: mod_security block Apache totally !!!! |
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underxp
Joined: 16 Jan 2006
Posts: 34
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 Posted: Mon 29 May '06 5:08 Post subject: mod_security block Apache totally !!!! |
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Hello, I want to use mod_status with Apache 2.0.x, I download from here and install it, copy and paste rules from here as:
| Code: |
<IfModule mod_security.c>
SecFilterEngine On
#SecFilterScanPOST On
SecFilterCheckURLEncoding On
SecFilterCheckUnicodeEncoding Off
# Accept almost all byte values
SecFilterForceByteRange 10 128
# Server masking is optional
SecServerSignature "Microsoft-IIS/4.0"
#SecUploadDir logs
#SecUploadKeepFiles Off
# Only record the interesting stuff
SecAuditEngine RelevantOnly
SecAuditLog logs/security.log
## -- Common attacks --------------------
SecFilterDefaultAction "deny,log,msg:'Common attacks',status:403"
#Web Proxy GET Request
SecFilter "^GET (http|https|ftp)\:/"
#Web Proxy HEAD Request
SecFilter "^HEAD (http|https|ftp)\:/"
#Proxy POST Request
SecFilter "^POST (http|https|ftp)\:/"
#Proxy CONNECT Request
SecFilterSelective THE_REQUEST "^CONNECT "
# Only accept request encodings we know how to handle.
SecFilterSelective HTTP_Content-Type "!(^application/x-www-form-urlencoded$|^multipart/form-data;)"
# Do not accept GET or HEAD requests with bodies
SecFilterSelective REQUEST_METHOD "^(GET|HEAD)$" chain
SecFilterSelective HTTP_Content-Length "!^$"
# Restrict which request methods can be used
SecFilterSelective REQUEST_METHOD "!^(GET|HEAD|POST)$"
# Restrict protocol versions.
SecFilterSelective SERVER_PROTOCOL "!^HTTP/(0\.9|1\.0|1\.1)$"
# Require Content-Length to be provided with every POST request.
SecFilterSelective REQUEST_METHOD "^POST$" chain
SecFilterSelective HTTP_Content-Length "^$"
# Don't accept transfer encodings we know we don't know how to handle
SecFilterSelective HTTP_Transfer-Encoding "!^$"
## -- PHP attacks --------------------
SecFilterSignatureAction "log,deny,msg:'PHP attack'"
# Possible code execution attack (targets valid PHP streams constructs)
SecFilterSelective ARGS_NAMES "^php:/"
#phpBB attack
SecFilterSelective ARG_highlight "(\x27|%27|\x2527|%2527)"
## -- Awstats-------------------------
SecFilterSignatureAction "log,deny,msg:'Awstats Attack'"
SecFilterSelective ARGS_NAMES "configdir"
## -- SQL Injection Attacks --------------------
SecFilterSignatureAction "log,deny,msg:'SQL Injection attack'"
# Generic
SecFilterSelective ARGS "delete[[:space:]]+from"
SecFilterSelective ARGS "drop[[:space:]]+database"
SecFilterSelective ARGS "drop[[:space:]]+table"
SecFilterSelective ARGS "drop[[:space:]]+column"
SecFilterSelective ARGS "drop[[:space:]]+procedure"
SecFilterSelective ARGS "create[[::space:]]+table"
SecFilterSelective ARGS "update.+set.+="
SecFilterSelective ARGS "insert[[:space:]]+into.+values"
SecFilterSelective ARGS "select.+from"
SecFilterSelective ARGS "bulk[[:space:]]+insert"
SecFilterSelective ARGS "union.+select"
SecFilterSelective ARGS "or.+1[[:space:]]*=[[:space:]]1"
SecFilterSelective ARGS "alter[[:space:]]+table"
SecFilterSelective ARGS "or 1=1--'"
SecFilterSelective ARGS "'.+--"
# MySQL
SecFilterSelective ARGS "into[[:space:]]+outfile"
SecFilterSelective ARGS "load[[:space:]]+data
SecFilterSelective ARGS "/\*.+\*/"
## -- Command execution --------------------
SecFilterSignatureAction "log,deny,msg:'Command execution attack'"
SecFilterSelective ARGS_VALUES "^(uname|id|ls|rm|kill)"
SecFilterSelective ARGS_VALUES "^(ls|id|pwd|wget)"
SecFilterSelective ARGS_VALUES ";[[:space:]]*(ls|id|pwd|wget)"
</IfModule>
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When i activated this module, NONE page is accesible now, security.log says:
| Code: |
==29000000==============================
Request: Ap2058 127.0.0.1 - - [28/May/2006:23:22:05 --0400] "GET / HTTP/1.1" 403 179 "-" "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)" - "-"
----------------------------------------
GET / HTTP/1.1
Accept: */*
Accept-Language: es-ve
Accept-Encoding: gzip, deflate
If-Modified-Since: Sat, 20 Nov 2004 18:16:24 GMT
If-None-Match: "2233-2c-9efc6e00"
User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)
Host: localhost
Connection: Keep-Alive
mod_security-message: Access denied with code 403. Pattern match "!(^application/x-www-form-urlencoded$|^multipart/form-data;)" at HEADER("Content-Type") [msg "Common attacks"] [severity "EMERGENCY"]
mod_security-action: 403
HTTP/1.1 403 Forbidden
Vary: Accept-Encoding
Content-Encoding: gzip
Content-Length: 179
Keep-Alive: timeout=2, max=100
Connection: Keep-Alive
Content-Type: text/html; charset=iso-8859-1
--29000000--
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I can't open any page. I think that is a problem with mod_deflate and the rule:
SecFilterSelective HTTP_Content-Type "!(^application/x-www-form-urlencoded$|^multipart/form-data;)"
I disabled this rule and Apache serves page fine. Can anyone tell me why mod_security block any request ? |
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underxp
Joined: 16 Jan 2006
Posts: 34
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| Posted: Mon 29 May '06 5:10 Post subject: |
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Btw, i have this directives for mod_deflate:
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<IfModule mod_deflate.c>
AddOutputFilterByType DEFLATE text/html text/plain text/xml
BrowserMatch ^Mozilla/4 gzip-only-text/html
BrowserMatch ^Mozilla/4\.0[678] no-gzip
BrowserMatch \bMSI[E] !no-gzip !gzip-only-text/html
DeflateCompressionLevel 9
DeflateMemLevel 9
DeflateWindowSize 15
DeflateBufferSize 8096
DeflateFilterNote deflate_ratio
LogFormat "%v %h %l %u %t \"%r\" %>s %b mod_deflate: %{deflate_ratio}n pct." vhost_with_deflate_info
CustomLog logs/deflate.log vhost_with_deflate_info
</IfModule>
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Steffen
Moderator
Joined: 15 Oct 2005
Posts: 3092
Location: Hilversum, NL, EU
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| Posted: Mon 29 May '06 17:36 Post subject: |
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Nothing to do with deflate.
Looks like you removed the line with "chain" at the end:
You have:
# Only accept request encodings we know how to handle.
SecFilterSelective HTTP_Content-Type "!(^application/x-www-form-urlencoded$|^multipart/form-data;)"
It must be:
# Only accept request encodings we know how to handle.
SecFilterSelective REQUEST_METHOD "!^(GET|HEAD)$" chain
SecFilterSelective HTTP_Content-Type "!(^application/x-www-form-urlencoded$|^multipart/form-data;)"
Steffen |
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underxp
Joined: 16 Jan 2006
Posts: 34
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| Posted: Tue 30 May '06 2:37 Post subject: |
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| Thanks Stefen I'll try and post results laters |
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underxp
Joined: 16 Jan 2006
Posts: 34
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| Posted: Tue 30 May '06 2:39 Post subject: |
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I catch the error:
| Code: |
# Do not accept GET or HEAD requests with bodies
SecFilterSelective REQUEST_METHOD "^(GET|HEAD)$" chain
SecFilterSelective HTTP_Content-Length "!^$"
# Restrict which request methods can be used
SecFilterSelective REQUEST_METHOD "!^(GET|HEAD|POST)$"
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REQUEST_METHOD is duplicated and the last don't have chain |
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