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mozillaMozilla FoundationMFSA2021-37
HistoryAug 16, 2021 - 12:00 a.m.

Security Vulnerabilities fixed in Firefox 91.0.1 and Thunderbird 91.0.1 — Mozilla

2021-08-1600:00:00
Mozilla Foundation
www.mozilla.org
298
firefox
thunderbird
http/3
header splitting
security

CVSS2

5.8

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:M/Au:N/C:P/I:P/A:N

CVSS3

8.1

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

EPSS

0.002

Percentile

53.0%

JSON

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.

Affected configurations

Vulners
Node
mozillafirefoxRange<91.0.1
OR
mozillathunderbirdRange<91.0.1

Related

cve 1
kaspersky 2
nessus 21
cvelist 1
osv 2
openvas 15
alpinelinux 1
altlinux 2
ubuntu 2
prion 1
debiancve 1
redhatcve 1
veracode 1
nvd 1
ubuntucve 1
suse 5
cve
cve
CVE-2021-29991
2021-11-03 01:15:07
kaspersky
kaspersky
KLA12266 DoS vulnerability in Mozilla Thunderbird
2021-08-16 00:00:00
KLA12265 DoS vulnerability in Mozilla Firefox
2021-08-16 00:00:00
nessus
nessus
Mozilla Thunderbird < 91.0.1
2021-08-17 00:00:00
Fedora 34 : firefox (2021-74b76e593a)
2021-08-25 00:00:00
Ubuntu 18.04 LTS / 20.04 LTS : Firefox vulnerability (USN-5047-1)
2021-08-19 00:00:00
cvelist
cvelist
CVE-2021-29991
2021-11-03 00:04:17
osv
osv
firefox vulnerability
2021-08-19 14:53:59
thunderbird vulnerabilities
2022-01-21 17:00:48
openvas
openvas
Ubuntu: Security Advisory (USN-5047-1)
2022-08-26 00:00:00
Mozilla Firefox Security Advisory (MFSA2021-37) - Linux
2021-11-08 00:00:00
SUSE: Security Advisory (SUSE-SU-2021:3191-1)
2021-09-23 00:00:00
alpinelinux
alpinelinux
CVE-2021-29991
2021-11-03 01:15:07
altlinux
altlinux
Security fix for the ALT Linux 10 package thunderbird version 91.0.2-alt1
2021-08-23 00:00:00
Security fix for the ALT Linux 10 package firefox-esr version 91.0.1-alt1
2021-09-04 00:00:00
ubuntu
ubuntu
Firefox vulnerability
2021-08-19 00:00:00
Thunderbird vulnerabilities
2022-01-21 00:00:00
prion
prion
Code injection
2021-11-03 01:15:00
debiancve
debiancve
CVE-2021-29991
2021-11-03 01:15:07
redhatcve
redhatcve
CVE-2021-29991
2021-08-18 17:34:46
veracode
veracode
Header Splitting Attack
2021-08-22 13:42:46
nvd
nvd
CVE-2021-29991
2021-11-03 01:15:07
ubuntucve
ubuntucve
CVE-2021-29991
2021-08-18 00:00:00
suse
suse
Security update for MozillaFirefox (important)
2021-10-18 00:00:00
Security update for MozillaFirefox (important)
2021-10-16 00:00:00
Security update for MozillaFirefox (important)
2021-10-11 00:00:00

CVSS2

5.8

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:M/Au:N/C:P/I:P/A:N

CVSS3

8.1

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

EPSS

0.002

Percentile

53.0%

JSON
Related for MFSA2021-37
cve1kaspersky2nessus21cvelist1osv2openvas15alpinelinux1altlinux2ubuntu2prion1debiancve1redhatcve1veracode1nvd1ubuntucve1suse5