CVE-2021-21323
Assigner: GitHub_M
Published: 2021-02-23T22:45:19
State: PUBLISHED
affected: product: brave-browser
vendor: brave
versions: status: affected
version: >= 1.17.73, < 1.20.108
descriptions: value: 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
metrics: cvssV3_1: attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: NONE
baseScore: 4.3
baseSeverity: MEDIUM
confidentialityImpact: LOW
integrityImpact: NONE
privilegesRequired: NONE
scope: UNCHANGED
userInteraction: REQUIRED
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
version: 3.1
problemTypes: descriptions: cweId: CWE-200
description: CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
type: CWE
source: advisory: GHSA-mqjf-9x5g-2rv6
discovery: UNKNOWN
title: Regression in DNS leakage from Tor windows