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david_berg_3177's avatar
david_berg_3177
Icon for Nimbostratus rankNimbostratus
Nov 24, 2018

no signature id in blocked request and no accept button available

hi everyone i have an issue with f5 logging. i have a request that is blocked, but no attack signature id is available in request log. attack type is path traversal and Violation Rating is Request is most likely a false positive. i have attached a screenshot below:

 

  • Path Traversal is an Evasion technique, not an Attack Signature.

     

    Security ›› Application Security : Policy Building : Learning and Blocking Settings

     

    Evasion Technique detected

     

    > Directory traversals

     

  • thank you for your response. in request log it hasnt specified (in the header or post payload) that where directory traversal has been detected.how can i find it?

     

    • Simon_Blakely's avatar
      Simon_Blakely
      Icon for Employee rankEmployee

      Directory Traversal can only occur in the URI Path (i.e /../../ or similar).

       

  • but threre is no directory traversal in uri:

     

    POST /Module/Template/Item/DataItem.aspx?SiteId=d358f6f2-0g23b-4be0-857e-a11b763fb7bd&WebpartId=e02541c7-eccf-4d96-8bf2-ac352bfa367 HTTP/1.1

     

    there is no violation name available above the URL in request log and i cant determine which violation has occurred.see screenshot below:

     

     

    • Simon_Blakely's avatar
      Simon_Blakely
      Icon for Employee rankEmployee

      Is the POST content a multipart form or file upload?

       

      File upload elements can have paths as well.

       

      You will probably get a better result by raising a support ticket with F5, so the engineer can review the actual violation and policy.