CVE-2021-29991
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.
Risk Information
Base Score
8.1
MODERATE
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
EPSS Score
Exploitation Probability
0.341
Associated Vulnerability
| Vulnerability | OS Platform |
|---|---|
| Vulnerabilities CVE-2021-29991 are fixed in Mozilla Firefox (91.0.1) | Windows |
| Vulnerabilities CVE-2021-29991 are fixed in Mozilla Firefox (x64) (91.0.1) | Windows |
| Vulnerabilities CVE-2021-29991 are affected in Mozilla Thunderbird 91.0.0 | Windows |
| Vulnerabilities CVE-2021-29991 are fixed in Mozilla Firefox For Mac (91.0.1) | Mac |
| Multiple Vulnerabilities are affected in Mozilla Firefox for Mac 91.0 | Mac |
| Mozilla Open Source mail and newsgroup client (USN-5248-1) thunderbird_91.5.0+build1-0ubuntu0.18.04.1_i386.deb | Linux |
| Mozilla Open Source mail and newsgroup client (USN-5248-1) thunderbird_91.5.0+build1-0ubuntu0.18.04.1_amd64.deb | Linux |
| Mozilla Open Source mail and newsgroup client (USN-5248-1) thunderbird_91.5.0+build1-0ubuntu0.20.04.1_amd64.deb | Linux |
| SUSE-SU-2022:1582-1(SUSE Linux Enterprise Server 12-SP5 ) MozillaFirefox-91.9.0-112.104.1.x86_64.rpm | Linux |
Patch Details
Click to see the patches provided by ManageEngine for this CVE
| Patch ID | Patch Description |
|---|---|
| PATCH-320981 | Mozilla Firefox (91.0.1) |
| PATCH-320982 | Mozilla Firefox (x64) (91.0.1) |
| PATCH-607000 | Mozilla Firefox For Mac (124.0) |
| PATCH-611870 | Mozilla Firefox For Mac (142.0.1) |
References
https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234