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CVE-2023-3747— Insufficient Validation on Override Codes for Always-Enabled WARP Mode

Quick assessment

Affected
Cloudflare WARP Client
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Cloudflare Zero Trust是Cloudflare公司的取代了传统的安全边界，为世界各地的团队提供更快、更安全互联网的平台。 Cloudflare Zero Trust 存在安全漏洞，该漏洞源于缺乏服务器端验证，具有设备本地访问权限的攻击者可能会延长客户端授予的最大允许断开连接时间，通过覆盖代码更改运行的本地设备上的日期和时间。

CVSS 5.5 · Medium EPSS 0.20% · P9
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I. Basic Information for CVE-2023-3747

Vulnerability Information
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Vulnerability Title
Insufficient Validation on Override Codes for Always-Enabled WARP Mode
Source: CVE Program / CVE List V5
Vulnerability Description
Zero Trust Administrators have the ability to disallow end users from disabling WARP on their devices. Override codes can also be created by the Administrators to allow a device to temporarily be disconnected from WARP, however, due to lack of server side validation, an attacker with local access to the device, could extend the maximum allowed disconnected time of WARP client granted by an override code by changing the date & time on the local device where WARP is running.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
服务端安全的客户端实施
Source: CVE Program / CVE List V5
Vulnerability Title
Cloudflare Zero Trust 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cloudflare Zero Trust是Cloudflare公司的取代了传统的安全边界，为世界各地的团队提供更快、更安全互联网的平台。 Cloudflare Zero Trust 存在安全漏洞，该漏洞源于缺乏服务器端验证，具有设备本地访问权限的攻击者可能会延长客户端授予的最大允许断开连接时间，通过覆盖代码更改运行的本地设备上的日期和时间。
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 Client 0 ~ 6.29 -

II. Public POCs for CVE-2023-3747

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III. Intelligence Information for CVE-2023-3747

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Other References for CVE-2023-3747 (2)

IV. Related Vulnerabilities

Same product: WARP Client
Same vendor: Cloudflare
Same weakness: CWE-602

V. Comments for CVE-2023-3747

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