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Bug 808925 (CVE-2021-29991) - [Tracker] HTTP/3 Header splitting in Mozilla products
Summary: [Tracker] HTTP/3 Header splitting in Mozilla products
Status: RESOLVED FIXED
Alias: CVE-2021-29991
Product: Gentoo Security
Classification: Unclassified
Component: Vulnerabilities (show other bugs)
Hardware: All Linux
: Normal normal (vote)
Assignee: Gentoo Security
URL: https://www.mozilla.org/en-US/securit...
Whiteboard:
Keywords:
Depends on: 808927 808933
Blocks:
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Reported: 2021-08-18 19:56 UTC by John Helmert III
Modified: 2021-08-24 16:26 UTC (History)
0 users

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Description John Helmert III archtester Gentoo Infrastructure gentoo-dev Security 2021-08-18 19:56:21 UTC 
"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."