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Cross-Site ETag Length Leak
Turns the ETag header into a cross-site oracle: ETag encodes response size in hex, so crossing a hex-digit boundary changes its length by one byte, echoed back in If-None-Match, which can push a padded request past the server header limit into a 431. Chromium then replaces rather than pushes the history entry, so history.length reveals the answer character by character.
Record
- Researcher
- arkark
- Published by
- blog.arkark.dev
- Date
- Topic
- Other
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This page is the archive's own catalogue record. The research is the work of arkark, first published at the original source. Preserved copies are kept so the citation survives its host; this one was last captured on .