felixdoerreandFelix Dörre
3846d3aa29
When verifying seals produced with forward secure sealing, the verification currently does not check that old entries are only sealed with the key for their epoch and not a more recent one. This missing check allows an attacker to remove seals, and create new ones with the currently available key, and verify will claim everything is in order, although all entries could have been modified. This resolves CVE-2023-31439. Co-authored-by: Felix Dörre <felix.doerre@kit.edu>
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