PT-2023-21198 · Cloudflare · Cloudflare Warp Client For Windows

Vanhoefm · Published 2023-08-03 · Updated 2023-08-09 · CVE-2023-2754

Positive Technologies (AI Summary)

CVSS v3.1

7.4

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Cloudflare WARP client for Windows (affected versions not specified)

Description The Cloudflare WARP client for Windows assigns loopback IPv4 addresses for the DNS Servers, as it acts as a local DNS server that performs DNS queries in a secure manner. However, when connected to WARP over an IPv6-capable network, the WARP client does not assign loopback IPv6 addresses but instead uses Unique Local Addresses. Under certain conditions, this could allow an attacker to view DNS queries made by the device, as these addresses may point to unknown devices in the same local network.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Cleartext Transmission of Sensitive Information

Weakness Enumeration

CWE-319

Related Identifiers

CVE-2023-2754

GHSA-MV6G-7577-VQ4W

Affected Products

Cloudflare Warp Client For Windows

References · 7

• https://github.com/cloudflare/advisories/security/advisories/GHSA-mv6g-7577-vq4w · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2023-2754 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-2754 · Security Note
• https://t.me/cibsecurity/67686 · Telegram Post
• https://t.me/cvenotify/56173 · Telegram Post
• https://install.appcenter.ms/orgs/cloudflare/apps/1.1.1.1-windows-1/distribution_groups/release · Note
• https://developers.cloudflare.com/warp-client · Note