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The Intruder broke in 2021.8. x (the Resource pool does not work)

Dmitriy | Last updated: Aug 25, 2021 09:14AM UTC

Hi! In the last two updates, my Intruder broke down. It ignores concurrent requests in the Resource pool. It doesn't matter whether I set 10 concurrent requests or 999, the process is extremely slow, 1-3 requests per second. Before these updates, everything was fine. What can you recommend? P.S. I understand that I can use a Turbo Intruder instead of the usual one, but in some situations it is the usual Intruder that is needed. Thank you!

Uthman, PortSwigger Agent | Last updated: Aug 25, 2021 10:27AM UTC

Hi Dmitriy, I have just double-checked this behavior in the latest version (2021.8.2) of Burp and it appears to be working as expected. I have tested it with the max concurrent requests set to 4, 10, and 200. Has anything changed with the application you are testing? Or can you replicate this on any site/application (e.g. https://portswigger-labs.net)? Can you replicate it with all extensions disabled? Have you set anything under 'Delay between requests' on your resource pool? Can you please share a screen recording, steps to replicate, and some diagnostics with support@portswigger.net?

Dmitriy | Last updated: Aug 25, 2021 10:57AM UTC

Hi Uthman and team! I sent the video to support@portswigger.net. It shows that the intruder ignores concurrent requests in the Resource pool (regardless of whether there is a delay between requests or not). All plugins are disabled. Thank you in advance for your help! Best Regards, Dmitriy.

Uthman, PortSwigger Agent | Last updated: Aug 25, 2021 11:55AM UTC