PT-2021-22166 · Mozilla+3 · Firefox+5
Sergey Galich
·
Published
2021-11-03
·
Updated
2024-12-12
·
CVE-2021-38505
CVSS v3.1
6.5
Medium
| Vector | AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N |
Name of the Vulnerable Software and Affected Versions
Firefox versions prior to 94
Thunderbird versions prior to 91.3
Firefox ESR versions prior to 91.3
Description
The issue concerns the Cloud Clipboard feature in Windows 10, which records data copied to the clipboard to the cloud, making it available on other computers in certain scenarios. Applications must use specific clipboard formats to prevent copied data from being recorded in Cloud History. However, Firefox did not implement these formats in versions prior to 94 and ESR 91.3, potentially causing sensitive data to be recorded to a user's Microsoft account. This issue only affects Firefox for Windows 10 and later with Cloud Clipboard enabled, and does not impact other operating systems.
Recommendations
For Firefox versions prior to 94, update to version 94 or later to resolve the issue.
For Thunderbird versions prior to 91.3, update to version 91.3 or later to resolve the issue.
For Firefox ESR versions prior to 91.3, update to version 91.3 or later to resolve the issue.
As a temporary workaround, consider disabling the Cloud Clipboard feature in Windows 10 settings until the issue is resolved.
Exploit
Fix
Exposure of Resource to Wrong Sphere
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Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Firefox
Firefox Esr
Suse
Thunderbird
Windows 10