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Scanner stucks when pausing

Chris | Last updated: Sep 11, 2017 02:26PM UTC

Hello, Many times I see that the scanner doesn't send any more requests and the I pause it. However the message "waiting for pause" never disappears and the scanner is only again usable when I close burp and restart it.

Liam, PortSwigger Agent | Last updated: Sep 11, 2017 02:29PM UTC

Are you pausing the Scanner after it stops sending requests? Is the application you are testing still functioning as normal when this occurs?

Burp User | Last updated: Sep 11, 2017 03:51PM UTC

Yes to both of them

Liam, PortSwigger Agent | Last updated: Sep 12, 2017 09:52AM UTC

Are you able to reproduce this issue consistently? Do you see any errors in the Alerts tab?

Burp User | Last updated: Sep 12, 2017 03:40PM UTC

No, this happens randomly. Yes, I see alerts that connection to host is timed out, which is not true as I can access the host with any other tool. Also this issue is not host-specific.

Liam, PortSwigger Agent | Last updated: Sep 12, 2017 03:46PM UTC

Thanks Chris. We think we have been able to reproduce this issue. We'll investigate further and get back to you.

Liam, PortSwigger Agent | Last updated: Sep 12, 2017 03:54PM UTC

Hi Chris We haven't been able to reproduce the issue you are encountering. When this issue does happen, is the issue always resolved when you restart Burp?

Burp User | Last updated: Sep 13, 2017 06:46PM UTC

Hi Liam, yes the only workaround to make scanner work again is to restart burp. This is not host specific, it happens quite often, randomly. What info you want me to collect when this happen again? Thank you

Burp User | Last updated: Sep 13, 2017 07:11PM UTC

Hi, I forgot to mention that this happens since a long time ago. Also it is worth mentioning that this happens only if the scanner stops sending requests. For example imagine a thread is 79%, it doesnt send any other request while the host is responsive (maybe this is the main problem). Then I try to pause the scanner and the scanner is unusable. I cannot resume it again to continue scanning on other threads for example (until I restart burp).

Liam, PortSwigger Agent | Last updated: Sep 14, 2017 08:34AM UTC

We can look for exceptions in your instance of Burp Suite. Please can you send us your debug ID (at User options / Misc / Performance feedback)?

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