PT-2021-24305 · Brave+1 · Brave+2

Published 2021-12-27 · Updated 2022-01-07 · CVE-2021-45884

OSV

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

In Brave Desktop 1.17 through 1.33 before 1.33.106, when CNAME-based adblocking and a proxying extension with a SOCKS fallback are enabled, additional DNS requests are issued outside of the proxying extension using the system's DNS settings, resulting in information disclosure. NOTE: this issue exists because of an incomplete fix for CVE-2021-21323 and CVE-2021-22916.

Exploit

Fix

Information Disclosure

Weakness Enumeration

CWE-200

Related Identifiers

CVE-2021-45884

Affected Products

Brave

Brave Browser

Brave-Core

References · 7

• 🔥 https://github.com/brave/brave-browser/issues/19070 · Exploit
• https://github.com/brave/brave-core/pull/10742 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2021-45884 · Security Note
• https://osv.dev/vulnerability/CVE-2021-45884 · Vendor Advisory
• https://github.com/brave/brave-browser/issues/20079 · Note
• https://hackerone.com/reports/1377864 · Note
• https://t.me/cvenotify/25122 · Telegram Post