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CVE-2021-29991
Published: Nov 3, 2021
Modified: Aug 3, 2024
PUBLISHED
Description
Firefox incorrectly accepted a newline in a HTTP/3 header, interpretting it as two separate headers. This allowed for a header splitting attack against servers using HTTP/3. This vulnerability affects Firefox < 91.0.1 and Thunderbird < 91.0.1.
| Vendor | Product | Versions |
|---|---|---|
Mozilla | Firefox | affected unspecified - < 91.0.1 |
Mozilla | Thunderbird | affected unspecified - < 91.0.1 |
References
https://www.mozilla.org/security/advisories/mfsa2021-37/
x_refsource_MISC
https://bugzilla.mozilla.org/show_bug.cgi?id=1724896
x_refsource_MISC
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