Impact
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.)
Patches
1.20.108
References
#13527
For more information
If you have any questions or comments about this advisory, email us at security@brave.com. If you would like to report a security issue, please open one at https://hackerone.com/brave.
Impact
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.)
Patches
1.20.108
References
#13527
For more information
If you have any questions or comments about this advisory, email us at security@brave.com. If you would like to report a security issue, please open one at https://hackerone.com/brave.