[bounty] Usurping Mastodon and Broken Signature Schemes

Just a few issues this week, a Mastodon normalization issue leading to the potential to impersonate another account. Then we have a more complex chain starting again with a normalization leading to a fairly interesting request smuggling (CL.0 via malformed content-type header) and cache poisoning to leak credentials. Finally a crypto issue with a signature not actually being a signature.

Links and vulnerability summaries for this episode are available at: https://dayzerosec.com/podcast/223.html

[00:00:00] Introduction

[00:00:23] Usurping Mastodon instances - mastodon.so/cial [CVE-2023-42451]

[00:09:59] From Akamai to F5 to NTLM... with love.

[00:33:36] Our Pwn2Own journey against time and randomness (part 2)

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