Vulnerabilities > CVE-2021-21323 - Unspecified vulnerability in Brave
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
LOW Integrity impact
NONE Availability impact
NONE Summary
Brave is an open source web browser with a focus on privacy and security. In Brave versions 1.17.73-1.20.103, the CNAME adblocking feature added in Brave 1.17.73 accidentally initiated DNS requests that bypassed the Brave Tor proxy. Users with adblocking enabled would leak DNS requests from Tor windows to their DNS provider. (DNS requests that were not initiated by CNAME adblocking would go through Tor as expected.) This is fixed in Brave version 1.20.108
Vulnerable Configurations
References
- https://github.com/brave/brave-browser/issues/13527
- https://github.com/brave/brave-browser/issues/13527
- https://github.com/brave/brave-browser/security/advisories/GHSA-mqjf-9x5g-2rv6
- https://github.com/brave/brave-browser/security/advisories/GHSA-mqjf-9x5g-2rv6
- https://github.com/brave/brave-core/commit/12fe321eaad8acc1cbd1d70b4128f687777bcf15
- https://github.com/brave/brave-core/commit/12fe321eaad8acc1cbd1d70b4128f687777bcf15
- https://github.com/brave/brave-core/pull/7769
- https://github.com/brave/brave-core/pull/7769
- https://hackerone.com/reports/1077022
- https://hackerone.com/reports/1077022