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redhatcveRedhat.comRH:CVE-2021-29991
HistoryAug 18, 2021 - 5:34 p.m.

CVE-2021-29991

2021-08-1817:34:46
redhat.com
access.redhat.com
34

8.1 High

CVSS3

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

7.7 High

AI Score

Confidence

High

5.8 Medium

CVSS2

Access Vector

NETWORK

Access 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

0.002 Low

EPSS

Percentile

52.1%

JSON

The Mozilla Foundation Security Advisory describes this flaw as: 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.

Related

cve 1
nessus 20
mozilla 1
altlinux 2
prion 1
alpinelinux 1
openvas 15
ubuntu 2
debiancve 1
veracode 1
ubuntucve 1
osv 2
suse 5
cve
cve
CVE-2021-29991
2021-11-03 01:15:00
nessus
nessus
Fedora 34 : firefox (2021-74b76e593a)
2021-08-25 00:00:00
Mozilla Thunderbird < 91.0.1
2021-08-17 00:00:00
Mozilla Thunderbird < 91.0.1
2021-08-17 00:00:00
mozilla
mozilla
Security Vulnerabilities fixed in Firefox 91.0.1 and Thunderbird 91.0.1 — Mozilla
2021-08-16 00:00:00
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
prion
prion
Code injection
2021-11-03 01:15:00
alpinelinux
alpinelinux
CVE-2021-29991
2021-11-03 01:15:00
openvas
openvas
Mozilla Firefox Security Advisory (MFSA2021-37) - Linux
2021-11-08 00:00:00
Ubuntu: Security Advisory (USN-5047-1)
2022-08-26 00:00:00
SUSE: Security Advisory (SUSE-SU-2021:3191-1)
2021-09-23 00:00:00
ubuntu
ubuntu
Firefox vulnerability
2021-08-19 00:00:00
Thunderbird vulnerabilities
2022-01-21 00:00:00
debiancve
debiancve
CVE-2021-29991
2021-11-03 01:15:00
veracode
veracode
Header Splitting Attack
2021-08-22 13:42:46
ubuntucve
ubuntucve
CVE-2021-29991
2021-08-18 00:00:00
osv
osv
firefox vulnerability
2021-08-19 14:53:59
thunderbird vulnerabilities
2022-01-21 17:00:48
suse
suse
Security update for MozillaFirefox (important)
2021-10-18 00:00:00
Security update for MozillaFirefox (important)
2021-10-11 00:00:00
Security update for MozillaFirefox (important)
2021-10-16 00:00:00

8.1 High

CVSS3

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

7.7 High

AI Score

Confidence

High

5.8 Medium

CVSS2

Access Vector

NETWORK

Access 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

0.002 Low

EPSS

Percentile

52.1%

JSON
Related for RH:CVE-2021-29991
cve1nessus20mozilla1altlinux2prion1alpinelinux1openvas15ubuntu2debiancve1veracode1ubuntucve1osv2suse5