Firefox incorrectly accepted a newline in a HTTP/3 header...
High severity
Unreviewed
Published
May 24, 2022
to the GitHub Advisory Database
•
Updated Jan 30, 2023
Description
Published by the National Vulnerability Database
Nov 3, 2021
Published to the GitHub Advisory Database
May 24, 2022
Last updated
Jan 30, 2023
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.
References