CVE-2023-2754

Plaintext transmission of DNS requests in Windows 1.1.1.1 WARP client

Description

The Cloudflare WARP client for Windows assigns loopback IPv4 addresses for the DNS Servers, since WARP acts as local DNS server that performs DNS queries in a secure manner, however, if a user is connected to WARP over an IPv6-capable network, te WARP client did not assign loopback IPv6 addresses but Unique Local Addresses, which under certain conditions could point towards unknown devices in the same local network which enables an Attacker to view DNS queries made by the device.

Remediation

Solution:

  • Users are encouraged to update to the latest WARP Client (Windows) version available: 2023.7.160.0

Workaround:

  • Disabling IPv6 support in local devices

Category

7.4
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.43%
Vendor Advisory github.com
Affected: Cloudflare WARP
Published at:
Updated at:

References

Link Tags
https://install.appcenter.ms/orgs/cloudflare/apps/1.1.1.1-windows-1/distribution_groups/release release notes
https://github.com/cloudflare/advisories/security/advisories/GHSA-mv6g-7577-vq4w vendor advisory
https://developers.cloudflare.com/warp-client/ product

Frequently Asked Questions

What is the severity of CVE-2023-2754?
CVE-2023-2754 has been scored as a high severity vulnerability.
How to fix CVE-2023-2754?
To fix CVE-2023-2754: Users are encouraged to update to the latest WARP Client (Windows) version available: 2023.7.160.0
Is CVE-2023-2754 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-2754 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-2754?
CVE-2023-2754 affects Cloudflare WARP.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.