Two years ago, something very strange happened to me while working from my home network. I was exploiting a blind XXE vulnerability that required an external HTTP server to smuggle out files, so I spun up an AWS box and ran a simple Python webserver to receive the traffic from the vulnerable server.

Unbelievable…

  • treadful@lemmy.zipEnglish
    3·
    2 years ago

    I’ve generally been under the impression that my modern wasn’t worth worrying about, since it’s impossible to access via IP. Guess I have another thing to keep me awake at night.

    One of the things I’ll never understand was why the attacker was replaying my traffic? They were clearly in my network and could access everything without being detected, why replay all the HTTP requests? So odd.

    Was hoping to get an answer to this.

  • Deebster@programming.devEnglish
    1·
    2 years ago

    To fuzz this, I simply used Burp’s intruder to enumerate from %00 to %FF at the end of the URL.

    I like to think about what normal people would think when they read something like this. It sounds like a line from a cyberpunk wizard.

    We had confirmed that we could bypass authorization for the API endpoints by simply replaying the HTTP request multiple times

    Not really replaying, since his initial request worked. Feels like it’s going through a load balancer and one from that group of servers didn’t have authentication enabled (accidentally included a test/dev server, maybe).