Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Brave | Brave | >= 1.17.1, <= 1.33.106 |
| Apple | Macos | - |
| Linux | Linux Kernel | - |
| Microsoft | Windows | - |
Related Weaknesses (CWE)
References
- https://github.com/brave/brave-browser/issues/19070ExploitIssue TrackingPatch
- https://github.com/brave/brave-browser/issues/20079Issue TrackingRelease NotesThird Party Advisory
- https://github.com/brave/brave-core/pull/10742PatchThird Party Advisory
- https://hackerone.com/reports/1377864Permissions Required
- https://github.com/brave/brave-browser/issues/19070ExploitIssue TrackingPatch
- https://github.com/brave/brave-browser/issues/20079Issue TrackingRelease NotesThird Party Advisory
- https://github.com/brave/brave-core/pull/10742PatchThird Party Advisory
- https://hackerone.com/reports/1377864Permissions Required
FAQ
What is CVE-2021-45884?
CVE-2021-45884 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 e...
How severe is CVE-2021-45884?
CVE-2021-45884 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-45884?
Check the references section above for vendor advisories and patch information. Affected products include: Brave Brave, Apple Macos, Linux Linux Kernel, Microsoft Windows.