Description
In Brave Desktop 1.17 through 1.33 before 1.33.106, when CNAME-based adblocking and a proxying extension with a SOCKS fallback are enabled, additional DNS requests are issued outside of the proxying extension using the system's DNS settings, resulting in information disclosure. NOTE: this issue exists because of an incomplete fix for CVE-2021-21323 and CVE-2021-22916.
References (4)
Core 4
Core References
Patch, Third Party Advisory x_refsource_misc
https://github.com/brave/brave-core/pull/10742
Exploit, Issue Tracking, Patch, Third Party Advisory x_refsource_misc
https://github.com/brave/brave-browser/issues/19070
Issue Tracking, Release Notes, Third Party Advisory x_refsource_misc
https://github.com/brave/brave-browser/issues/20079
Permissions Required x_refsource_misc
https://hackerone.com/reports/1377864
Scores
CVSS v3
7.5
EPSS
0.0268
EPSS Percentile
83.9%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Details
CWE
CWE-200
Status
published
Products (1)
brave/brave
1.17.1 - 1.33.106
Published
Dec 27, 2021
Tracked Since
Feb 18, 2026