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.
Analysis and contextual insights are available on OpenCVE Cloud.
Remediation
No vendor fix or workaround currently provided.
Additional remediation guidance may be available on OpenCVE Cloud.
Tracking
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Advisories
| Source | ID | Title |
|---|---|---|
EUVD |
EUVD-2021-16450 | 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. |
Ubuntu USN |
USN-5047-1 | Firefox vulnerability |
Ubuntu USN |
USN-5248-1 | Thunderbird vulnerabilities |
References
History
No history.
Status: PUBLISHED
Assigner: mozilla
Published:
Updated: 2024-08-03T22:24:59.901Z
Reserved: 2021-04-01T00:00:00.000Z
Link: CVE-2021-29991
No data.
Status : Modified
Published: 2021-11-03T01:15:07.060
Modified: 2024-11-21T06:02:07.710
Link: CVE-2021-29991
OpenCVE Enrichment
No data.
EUVD
Ubuntu USN