What is CVE-2023-2754?

CVE-2023-2754 is a high-severity vulnerability in Cloudflare Warp, classified under Cleartext Transmission of Sensitive Information. CVSS score: 7.4/10. Published 2023-08-03.

How severe is CVE-2023-2754?

High severity. CVSS v3 base score is 7.4 out of 10.

Vulnerability in Cloudflare Warp

CVE-2023-2754

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.

EPSS: 0.007 (51.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N.

Affected products

Cloudflare Warp — versions 0

Weakness classification (CWE)

CWE-319 — Cleartext Transmission of Sensitive Information

References

cna@cloudflare.com (release-notes, Release Notes)
cna@cloudflare.com (vendor-advisory, Vendor Advisory)
cna@cloudflare.com (Product, product)

Frequently asked questions

What is CVE-2023-2754?: CVE-2023-2754 is a high-severity vulnerability in Cloudflare Warp, classified under Cleartext Transmission of Sensitive Information. CVSS score: 7.4/10. Published 2023-08-03.
How severe is CVE-2023-2754?: High severity. CVSS v3 base score is 7.4 out of 10.