Collected research
Exploiting padding oracles with fixed IVs
A session token is encrypted with AES-CBC but never signed and uses a fixed IV, so a padding oracle can forge chosen plaintext apart from one uncontrollable random block. Reusing the leading blocks of a freely issued anonymous token moves that junk inside a JSON string, and a second user property placed after it wins in JSON.parse, producing an admin token.
Record
- Published by
- Teddy Katz’s Blog
- Date
- Topic
- Crypto
In the archive
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This page is the archive's own catalogue record. The research is the work of Teddy Katz’s Blog, first published at the original source. Preserved copies are kept so the citation survives its host; this one was last captured on .