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how can i block brute force in 2 separated login parameters in 2 diff pages?

how can i block brute force for 2 separated parameters in 2 diff pages?

the application has username in first page when u enter it it will redirect to password page . can i block brute force in that case?

does this way of authentication in application prevent brute force without applying f5 brute force ?

if i use brute force tool can i use it to brute force 2 separated parameters in 2 diff pages?

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Comments on this Question
Comment made 26-Dec-2017 by boneyard 5637

are you using the ASM module?

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Comment made 27-Dec-2017 by yosry92 69

yes

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Comment made 10-Jan-2018 by Jeff Maddox

Does the password page only get presented with a valid username, or does it accept any username and then presents the credential pair with the submit action on the password page?

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Comment made 10-Jan-2018 by youssef 4097

Hello,

I used this kind of deployment in an Identity fédération (SAML). I asked first Username for IDP discovery in order to fw user on the idp he is attached to... Then I asked Password.

I tried to do it with the ASM without success (I'm not sure that's possible on 2 different context with asm) and finally I did it with the apm: with localDB lockout... Are you using apm ?

regards,

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Answers to this Question

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USER ACCEPTED ANSWER & F5 ACCEPTED ANSWER

Hi,

You can try code like this (not tested)

it capture username in the first request, then store it for next request.

when the user send the password, it insert the username in the payload to allow ASM burteforce protection.

when ASM allowed the request, replace the payload by the previous one (in HTTP_REQUEST_SEND event)

when HTTP_REQUEST {
    if {[HTTP::uri] equals "/login"} {
        # replace the cookie name by the application cookie used to follow the session
        set key [HTTP::cookie value mycookie]
        if {[HTTP::header exists "Content-Length"] && [HTTP::header "Content-Length"] <= 1048576}{
            set content_length [HTTP::header "Content-Length"]
        } else {
            set content_length 1048576
        }
        # Check if $content_length is not set to 0
        if {($content_length > 0)} {
            HTTP::collect $content_length
        }
    }
}



when HTTP_REQUEST_DATA {
    if {[set username [URI::query "?[HTTP::payload]" username]] ne ""} {
        table set -subtable BruteForceProtection $key $username 300 900
    } elseif {[set username [URI::query "?[HTTP::payload]" password]] ne ""} {
        set username [table lifetime -subtable BruteForceProtection -remaining $key]
        set payload [HTTP::payload]
        HTTP::payload replace 0 [HTTP::payload length] "$payload&username=$username"
        set plength [HTTP::payload length]
        HTTP::release 
    }
}

when HTTP_REQUEST_SEND {
    if {[info exists $payload]} {
        HTTP::payload replace 0 $plength "$payload"
        unset payload
    }
}
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Comments on this Answer
Comment made 11-Jan-2018 by Dan Bowman 227

This looks promising thank you, I've been trying to achieve something similar:

https://devcentral.f5.com/questions/asm-brute-force-when-app-success-fail-isnt-the-first-response-56048

How would the password be inspected in the request_data event is the initial collect is only done on the first /login page? (assuming page 2 for password entry has different URI)

Also is the elseif 'set username' meant to read 'set password' or am I misreading? (reusing already set variable for convenience?)

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