IBM Support

IT39416: WEB APPLICATION FIREWALL INCORRECTLY BLOCKS ALL JSON TRAFFIC IF SQL INJECTION FILTERING IS ENABLED FOR A REQUEST PROFILE

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APAR status

  • Closed as program error.

Error description

  • When using Web Application Firewall (WAF) with SQL injection
filter enabled, and a request is received with
Content-Type=application/json in the header, the request is
rejected with:

<body>The Web Application Firewall has denied your transaction
due to a violation of policy.
   <P />You may want to clear the cookies in your
browser.</body>

You may also see the following error message:

20211109T114345.473Z
[some_domain][0x02030028][webapp-firewall][error]
web-application-firewall(MY_WAF): tid(12345)[error][x.x.x.x]:
SQL Signature Detected

Local fix

  • Turn off sql filter for json requests, by adding a specific
request profile just for json requests that does not have sql
injection enabled.  So instead of having 1 rule for all traffic,
there would be 1 rule for json traffic (that does not do sql
filtering) and another rule for all other traffic (that does do
sql filtering).

Problem summary

  • Allow JSON traffic through if the URI does not match the
criteria.

Problem conclusion

Temporary fix

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    IT39416
    • 

  • Reported component name
    DATAPOWER
    • 

  • Reported component ID
    DP1234567
    • 

  • Reported release
    18X
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt / Xsystem
    • 

  • Submitted date
    2021-12-15
    • 

  • Closed date
    2023-04-18
    • 

  • Last modified date
    2023-04-18
    • 





    

  • APAR is sysrouted FROM one or more of the following:
    

    • 

  • APAR is sysrouted TO one or more of the following:
    

    • 



Fix information


    

  • Fixed component name
    DATAPOWER
    • 

  • Fixed component ID
    DP1234567
    • 



Applicable component levels


    








      
              
                            

              

              [{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SS9H2Y","label":"IBM DataPower Gateways"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"18X","Line of Business":{"code":"LOB45","label":"Automation"}}]
              

                          

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            19 April 2023
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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