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CVE-2023-2754— Plaintext transmission of DNS requests in Windows 1.1.1.1 WARP client

Quick assessment

Affected
Cloudflare WARP
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Cloudflare WARP（Cloudflare Vpn）是美国Cloudflare公司的一个用于安全连接的客户端应用软件。 Cloudflare WARP client 2023.7.160.0之前版本存在安全漏洞，该漏洞源于WARP客户端中DNS请求使用了明文传输。

CVSS 7.4 · High EPSS 0.92% · P59

Possible ATT&CK Techniques 1 AI

T1040 · Network Sniffing
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I. Basic Information for CVE-2023-2754

Vulnerability Information
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Vulnerability Title
Plaintext transmission of DNS requests in Windows 1.1.1.1 WARP client
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
敏感数据的明文传输
Source: CVE Program / CVE List V5
Vulnerability Title
Cloudflare WARP 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cloudflare WARP（Cloudflare Vpn）是美国Cloudflare公司的一个用于安全连接的客户端应用软件。 Cloudflare WARP client 2023.7.160.0之前版本存在安全漏洞，该漏洞源于WARP客户端中DNS请求使用了明文传输。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Cloudflare WARP 0 ~ 2023.7.160.0 -

II. Public POCs for CVE-2023-2754

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 6982 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
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POC zip download
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III. Intelligence Information for CVE-2023-2754

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Vendor Advisories for CVE-2023-2754 (1)

Vendor Pages for CVE-2023-2754 (1)

Other References for CVE-2023-2754 (1)

Same Patch Batch · Cloudflare · 2023-08-03 · 3 CVEs total

CVE-2023-3766 5.9 MEDIUM Invalid Slice Split Results in Server Panic
CVE-2023-3348 5.7 MEDIUM Directory traversal vulnerability in Cloudflare Wrangler

IV. Related Vulnerabilities

Same product: WARP
Same vendor: Cloudflare
Same weakness: CWE-319

V. Comments for CVE-2023-2754

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