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Flipping bit attack base64

Vicky | Last updated: May 21, 2022 12:23PM UTC

The cookie of interest is encrypted and encoded two times with base64 I need Burp to decode two times, flip bit, and encode two times each attack. It looks like I can decode under Payload's "Payload Processing" section. How do I configure Burp so it would flip a bit and encode two times as my final payload?

Michelle, PortSwigger Agent | Last updated: May 23, 2022 12:16PM UTC

Thanks for your message. Would you be happy to send us an email with a sample of the cookie you're working with and some details on which bits you want to flip so we can take a closer look at the options for you, please?

Vicky | Last updated: Jun 14, 2022 03:01AM UTC

An email as sent to support@portswigger.net Please let me know if I should send it to a different one.

Michelle, PortSwigger Agent | Last updated: Jun 14, 2022 09:58AM UTC

Thanks for the update, we've got your email and we'll be in touch soon.

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