PT-2021-2746 · Mozilla+7 · Firefox+9
Nika Layzell
·
Published
2021-04-19
·
Updated
2024-12-12
·
CVE-2021-23999
CVSS v3.1
8.8
High
| Vector | AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions:
Firefox versions prior to 88
Firefox ESR versions prior to 78.10
Thunderbird versions prior to 78.10
Description:
The issue is related to errors in inherited permissions, which can be exploited by a remote attacker using a specially crafted Blob URL to elevate privileges. If a Blob URL was loaded through unusual user interaction, it could have been loaded by the System Principal and granted additional privileges that should not be granted to web content.
Recommendations:
For Firefox versions prior to 88, update to version 88 or later to resolve the issue.
For Firefox ESR versions prior to 78.10, update to version 78.10 or later to resolve the issue.
For Thunderbird versions prior to 78.10, update to version 78.10 or later to resolve the issue.
Exploit
Fix
Improper Privilege Management
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Related Identifiers
Affected Products
Alt Linux
Astra Linux
Centos
Firefox
Firefox Esr
Linuxmint
Red Hat
Suse
Thunderbird
Ubuntu