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ubuntucveUbuntu.comUB:CVE-2021-29981
HistoryAug 11, 2021 - 12:00 a.m.

CVE-2021-29981

2021-08-1100:00:00
ubuntu.com
ubuntu.com
5

8.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

6.8 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

0.002 Low

EPSS

Percentile

56.7%

An issue present in lowering/register allocation could have led to obscure
but deterministic register confusion failures in JITted code that would
lead to a potentially exploitable crash. This vulnerability affects Firefox
< 91 and Thunderbird < 91.

Notes

Author Note
tyhicks mozjs contains a copy of the SpiderMonkey JavaScript engine
OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchfirefox< 91.0+build2-0ubuntu0.18.04.1UNKNOWN
ubuntu20.04noarchfirefox< 91.0+build2-0ubuntu0.20.04.1UNKNOWN
ubuntu21.04noarchfirefox< 91.0+build2-0ubuntu0.21.04.1UNKNOWN
ubuntu21.10noarchfirefox< 91.0+build2-0ubuntu1UNKNOWN
ubuntu22.04noarchfirefox< 91.0+build2-0ubuntu1UNKNOWN
ubuntu22.10noarchfirefox< 91.0+build2-0ubuntu1UNKNOWN
ubuntu23.04noarchfirefox< 91.0+build2-0ubuntu1UNKNOWN
ubuntu23.10noarchfirefox< 91.0+build2-0ubuntu1UNKNOWN
ubuntu18.04noarchmozjs38< anyUNKNOWN
ubuntu18.04noarchmozjs52< anyUNKNOWN
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8.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

6.8 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

0.002 Low

EPSS

Percentile

56.7%