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CVE-2023-1412— Local Privilege Escalation Vulnerability in WARP's MSI Installer

Quick assessment

Affected
Cloudflare WARP
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 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 2022.5.309.0及之前版本存在安全漏洞，该漏洞源于存在访问控制不当漏洞，允许对系统上下文执行特权操作。

CVSS 7.0 · High EPSS 0.24% · P14
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I. Basic Information for CVE-2023-1412

Vulnerability Information
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Vulnerability Title
Local Privilege Escalation Vulnerability in WARP's MSI Installer
Source: CVE Program / CVE List V5
Vulnerability Description
An unprivileged (non-admin) user can exploit an Improper Access Control vulnerability in the Cloudflare WARP Client for Windows (<= 2022.12.582.0) to perform privileged operations with SYSTEM context by working with a combination of opportunistic locks (oplock) and symbolic links (which can both be created by an unprivileged user). After installing the Cloudflare WARP Client (admin privileges required), an MSI-Installer is placed under C:\Windows\Installer. The vulnerability lies in the repair function of this MSI. ImpactAn unprivileged (non-admin) user can exploit this vulnerability to perform privileged operations with SYSTEM context, including deleting arbitrary files and reading arbitrary file content. This can lead to a variety of attacks, including the manipulation of system files and privilege escalation. PatchesA new installer with a fix that addresses this vulnerability was released in version 2023.3.381.0. While the WARP Client itself is not vulnerable (only the installer), users are encouraged to upgrade to the latest version and delete any older installers present in their systems.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
在文件访问前对链接解析不恰当(链接跟随)
Source: CVE Program / CVE List V5
Vulnerability Title
Cloudflare WARP 后置链接漏洞
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 2022.5.309.0及之前版本存在安全漏洞，该漏洞源于存在访问控制不当漏洞，允许对系统上下文执行特权操作。
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 ~ 2022.5.309.0 -

II. Public POCs for CVE-2023-1412

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III. Intelligence Information for CVE-2023-1412

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Vendor Advisories for CVE-2023-1412 (1)

Other References for CVE-2023-1412 (2)

IV. Related Vulnerabilities

Same product: WARP
Same vendor: Cloudflare
Same weakness: CWE-59

V. Comments for CVE-2023-1412

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