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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2021-21323 Detail

Description

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

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://github.com/brave/brave-browser/issues/13527 Patch  Third Party Advisory 
https://github.com/brave/brave-browser/issues/13527 Patch  Third Party Advisory 
https://github.com/brave/brave-browser/security/advisories/GHSA-mqjf-9x5g-2rv6 Third Party Advisory 
https://github.com/brave/brave-browser/security/advisories/GHSA-mqjf-9x5g-2rv6 Third Party Advisory 
https://github.com/brave/brave-core/commit/12fe321eaad8acc1cbd1d70b4128f687777bcf15 Patch  Third Party Advisory 
https://github.com/brave/brave-core/commit/12fe321eaad8acc1cbd1d70b4128f687777bcf15 Patch  Third Party Advisory 
https://github.com/brave/brave-core/pull/7769 Patch  Third Party Advisory 
https://github.com/brave/brave-core/pull/7769 Patch  Third Party Advisory 
https://hackerone.com/reports/1077022 Permissions Required  Third Party Advisory 
https://hackerone.com/reports/1077022 Permissions Required  Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-200 Exposure of Sensitive Information to an Unauthorized Actor GitHub, Inc.  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

3 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2021-21323
NVD Published Date:
02/23/2021
NVD Last Modified:
11/21/2024
Source:
GitHub, Inc.