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ubuntucveUbuntu.comUB:CVE-2021-4140
HistoryDec 31, 2021 - 12:00 a.m.

CVE-2021-4140

2021-12-3100:00:00
ubuntu.com
ubuntu.com
30
xslt markup
iframe sandbox bypass
firefox esr
firefox
thunderbird
security vulnerability

CVSS3

10

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

EPSS

0.003

Percentile

65.6%

JSON

It was possible to construct specific XSLT markup that would be able to
bypass an iframe sandbox. This vulnerability affects Firefox ESR < 91.5,
Firefox < 96, and Thunderbird < 91.5.

Notes

Author Note
tyhicks mozjs contains a copy of the SpiderMonkey JavaScript engine
OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchfirefox< 96.0+build2-0ubuntu0.18.04.1UNKNOWN
ubuntu20.04noarchfirefox< 96.0+build2-0ubuntu0.20.04.1UNKNOWN
ubuntu21.04noarchfirefox< 96.0+build2-0ubuntu0.21.04.1UNKNOWN
ubuntu21.10noarchfirefox< 96.0+build2-0ubuntu0.21.10.1UNKNOWN
ubuntu22.04noarchfirefox< 96.0+build2-0ubuntu1UNKNOWN
ubuntu22.10noarchfirefox< 96.0+build2-0ubuntu1UNKNOWN
ubuntu23.04noarchfirefox< 96.0+build2-0ubuntu1UNKNOWN
ubuntu23.10noarchfirefox< 96.0+build2-0ubuntu1UNKNOWN
ubuntu24.04noarchfirefox< 96.0+build2-0ubuntu1UNKNOWN
ubuntu18.04noarchmozjs38< anyUNKNOWN
Rows per page:
1-10 of 221

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CVSS3

10

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

EPSS

0.003

Percentile

65.6%

JSON
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