Information Exposure Affecting brave/brave-browser package, versions [1.17.73,1.20.104)


Severity

Recommended
0.0
medium
0
10

CVSS assessment by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.49% (65th percentile)

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  • Snyk IDSNYK-UNMANAGED-BRAVEBRAVEBROWSER-2364178
  • published26 Jan 2022
  • disclosed23 Feb 2021
  • creditUnknown

Introduced: 23 Feb 2021

CVE-2021-21323  (opens in a new tab)
CWE-200  (opens in a new tab)

How to fix?

Upgrade brave/brave-browser to version 1.20.104 or higher.

Overview

Affected versions of this package are vulnerable to Information Exposure. 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

CVSS Base Scores

version 3.1