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some questions about using burp suite professional

Ilqar | Last updated: Feb 20, 2022 06:35PM UTC

Hello. I have some questions about using burp suite professional . My questions : 1)How to fix high memory usage of Burp suite professional ? It uses decent memory and computer freezes while Burp suite is working. I have configured JAVA with options -Xms100m -Xmx5g. But this doesnot helped. I have launched crawl and audit large web-site and after some time my computer is freezes . I saw that on task manager my physical memory usage is 92 % while Burp suite is working. My computer processor is i7-4790 and RAM is 8 Gb. I have increased heap size memory to 8 gb and this didnot helped too .So how i can configure JAVA or Burp suite to use memory partially with data writen to hard disk not fully memory usage because computer is freezes and i cannot do other work on computer ? 2)Why Burp suite didnot crawl some web-sites ? Crawl starts and finishes immediatly with no errors.My crawl strategy was most complete. I saw in target tab it crawled just 12 locations but web-site have more than 5000 links. I crawled these web-sites with OWASP ZAP successfully .All web-sites that Burp suite didnot crawled was successfully fully crawled by OWASP ZAP. 3) Can i import crawled urls by OWASP ZAP to Burp suite ? thanks for answers

Uthman, PortSwigger Agent | Last updated: Feb 21, 2022 10:57AM UTC

Hi,

Please see the answers to your questions below:

  1. Have you tried applying some of the optimization techniques described in our documentation?

By default, Burp will use half of the memory available on your system (if -Xmx is not manually specified) so specifying 100% of the memory available will not help.

Can you also share the information below?

  • Can you also describe the exact steps to replicate your issue?
  • Do you have multiple scans and Intruder attacks running at the same time?
  • Do you have any resource-intensive applications (e.g. Docker or a local web server) running at the same time as Burp?
  • Do you have any extensions enabled? If you disable them, do you notice any improvement in performance?

  1. Please email support@portswigger.net with the information below:
    • Comparison of the Burp vs ZAP output
    • Is the site publicly accessible? If so, can you provide us permission to scan it to investigate this further?
    • Run a new scan with the crawl debug mode enabled and share the log file. You can enable debug mode via Dashboard > New scan > Scan configuration > New > Crawling > Crawl Optimization > click the cog button > Enabling logging
  1. You can do this using the Import To Sitemap extension. Further information can be found below:

For your crawl issue, please share the information requested so that we can investigate this properly for you.



Ilqar | Last updated: Feb 21, 2022 01:57PM UTC

Hello. Thanks for answers. Regarding your questions. 1)I didnot have multiple scans and/or Intruder attacks running at the same time.I didnot have any resource-intensive applications running while Burp was working.I didnot have any extensions enabled.However i will try to run crawl and audit with no options of JAVA run.I will answer if high memory usage will again occur.But i doubt that high memory usage will not occur. 2)The web-site that Burp didnot crawled is publicly accessible.I have emailed to support@portswigger.net log file of this crawl.I cannot give you permissions because the site not mine.I just gave you an example of Burp not crawling some sites. 3)Thanks. I will use this extension. Can you advice me good web crawler for windows ? I cannot found good web crawler.Some of them cannot use https protocol,some of them is limited to number of urls,some of them give errors,some of them crashes. I cannot use OWASP ZAP crawler too because OWASP ZAP uses high memory too.

Uthman, PortSwigger Agent | Last updated: Feb 21, 2022 02:15PM UTC