CVEvulnerability
CVE-2021-45884
7.5 HIGH
Official page ↗
- Status
- Modified
- Published
- 2021-12-27
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- CVSS 2.0 ([email protected])
- 4.3 MEDIUM — AV:N/AC:M/Au:N/C:P/I:N/A:N
- Weaknesses
- CWE-200
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.
Affected configurations
• brave brave (>= 1.17.1 <= 1.33.106)
Related
Weakness · CWE (1)
- CWE-200 Exposure of Sensitive Information to an Unauthorized Actor weakness
References
- https://github.com/brave/brave-browser/issues/19070 Exploit, Issue Tracking, Patch, Third Party Advisory
- https://github.com/brave/brave-browser/issues/20079 Issue Tracking, Release Notes, Third Party Advisory
- https://github.com/brave/brave-core/pull/10742 Patch, Third Party Advisory
- https://hackerone.com/reports/1377864 Permissions Required
- https://github.com/brave/brave-browser/issues/19070 Exploit, Issue Tracking, Patch, Third Party Advisory
- https://github.com/brave/brave-browser/issues/20079 Issue Tracking, Release Notes, Third Party Advisory
- https://github.com/brave/brave-core/pull/10742 Patch, Third Party Advisory
- https://hackerone.com/reports/1377864 Permissions Required