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ubuntucveUbuntu.comUB:CVE-2021-29991
HistoryAug 18, 2021 - 12:00 a.m.

CVE-2021-29991

2021-08-1800:00:00
ubuntu.com
ubuntu.com
11

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

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

52.2%

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. This vulnerability affects Firefox < 91.0.1 and
Thunderbird < 91.0.1.

Notes

Author Note
tyhicks mozjs contains a copy of the SpiderMonkey JavaScript engine
OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchfirefox< 91.0.1+build1-0ubuntu0.18.04.1UNKNOWN
ubuntu20.04noarchfirefox< 91.0.1+build1-0ubuntu0.20.04.1UNKNOWN
ubuntu21.04noarchfirefox< 91.0.1+build1-0ubuntu0.21.04.1UNKNOWN
ubuntu21.10noarchfirefox< 91.0.1+build1-0ubuntu1UNKNOWN
ubuntu22.04noarchfirefox< 91.0.1+build1-0ubuntu1UNKNOWN
ubuntu22.10noarchfirefox< 91.0.1+build1-0ubuntu1UNKNOWN
ubuntu23.04noarchfirefox< 91.0.1+build1-0ubuntu1UNKNOWN
ubuntu23.10noarchfirefox< 91.0.1+build1-0ubuntu1UNKNOWN
ubuntu18.04noarchmozjs38< anyUNKNOWN
ubuntu18.04noarchmozjs52< anyUNKNOWN
Rows per page:
1-10 of 151

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CVE-2021-29991
2021-11-03 01:15:00
nessus
nessus
Mozilla Thunderbird < 91.0.1
2021-08-17 00:00:00
Fedora 34 : firefox (2021-74b76e593a)
2021-08-25 00:00:00
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2021-08-17 00:00:00
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Security Vulnerabilities fixed in Firefox 91.0.1 and Thunderbird 91.0.1 — Mozilla
2021-08-16 00:00:00
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Header Splitting Attack
2021-08-22 13:42:46
redhatcve
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CVE-2021-29991
2021-08-18 17:34:46
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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
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Code injection
2021-11-03 01:15:00
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2021-11-03 01:15:00
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Firefox vulnerability
2021-08-19 00:00:00
Thunderbird vulnerabilities
2022-01-21 00:00:00
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2021-11-03 01:15:00
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Mozilla Firefox Security Advisory (MFSA2021-37) - Linux
2021-11-08 00:00:00
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2022-08-26 00:00:00
SUSE: Security Advisory (SUSE-SU-2021:3191-1)
2021-09-23 00:00:00
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2021-10-11 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

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

52.2%

JSON
Related for UB:CVE-2021-29991
cve1nessus20mozilla1veracode1redhatcve1altlinux2prion1alpinelinux1ubuntu2debiancve1openvas15osv2suse5