An attacker could have exploited a timing attack by sending a large number of allowCredential entries and detecting the difference between invalid key handles and cross-origin key handles. This could have led to cross-origin account linking in violation of WebAuthn goals. This vulnerability affects Thunderbird < 91.10, Firefox < 101, and Firefox ESR < 91.10.
CPE | Name | Operator | Version |
---|---|---|---|
firefox | lt | 101 | |
firefox_esr | lt | 91.10 | |
thunderbird | lt | 91.10 |