CVE-2021-21323 - OpenCVE

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

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact None

Availability Impact None

User Interaction Required

No CVSS v3.0

Access Vector Network

Access Complexity Medium

Authentication None

Confidentiality Impact Partial

Integrity Impact None

Availability Impact None

AV:N/AC:M/Au:N/C:P/I:N/A:N

This CVE is not in the KEV list.

Key SSVC decision points have not yet been added.

Vendors	Products
Brave	Brave

Configuration 1 [-]

cpe:2.3:a:brave:brave:*:*:*:*:*:*:*:*

No data.

References

Link	Providers
https://github.com/brave/brave-browser/issues/13527
https://github.com/brave/brave-browser/security/advisories/GHSA-mqjf-9x5g-2rv6
https://github.com/brave/brave-core/commit/12fe321eaad8acc1cbd1d70b4128f687777bcf15
https://github.com/brave/brave-core/pull/7769
https://hackerone.com/reports/1077022

History

No history.

MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2021-02-23T22:45:19

Updated: 2024-08-03T18:09:15.370Z

Reserved: 2020-12-22T00:00:00

Link: CVE-2021-21323

Vulnrichment

No data.

NVD

Status : Analyzed

Published: 2021-02-23T23:15:13.317

Modified: 2021-03-01T16:14:07.370

Link: CVE-2021-21323

Redhat

No data.

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