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Sriram_Shanmuga's avatar
Sriram_Shanmuga
Icon for Altostratus rankAltostratus
Sep 20, 2018

JSON Parser Attack

Hi All,

 

I have enabled WAF policy in blocking mode and i could see the WAF is blocking. Client is using JSON scripts and its being blocked by WAF.

 

How to bypass the JSON parser attack .

 

Thanks

 

application delivery
ASM Advanced WAF
security

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  • Sriram_Shanmuga's avatar
    Sriram_Shanmuga
    Icon for Altostratus rankAltostratus
    Sep 20, 2018

    I have enabled WAF policy and apply to a Virtual server in Transparent mode. When the user execute JSON script in Postman tool, they are thrown a support id.

     

    Is it an expected behavior from WAF ?

     

    Regaards RAM

     

  • OM's avatar
    OM
    Icon for Nimbostratus rankNimbostratus
    Apr 07, 2022

    enabling WAF may block requests if you don't custom your policy according to your needs.

    if your json content has some special characters or any pattern that may match a signature, the request may get blocked.

    you can look at the logs and see what is the reason of the blocking.