title: Local Privilege Escalation in Cloudflare WARP Installer (Windows)
description: Due to a hardlink created in the ProgramData folder during the repair process of the software, the installer (MSI) of WARP Client for Windows (<= 2022.12.582.0) allowed a malicious attacker to forge the destination of the hardlink and escalate privileges, overwriting SYSTEM protected files.
As Cloudflare WARP client for Windows (up to version 2022.5.309.0) allowed creation of mount points from its ProgramData folder, during installation of the WARP client, it was possible to escalate privileges and overwrite SYSTEM protected files.
problem types: CWE-59 Improper Link Resolution Before File Access ('Link Following')
affected:
{
defaultStatus: unaffected
modules: MSI
packageName: WARP Installer
platforms: Windows
product: WARP
vendor: Cloudflare
versions:
changes: [at: 2023.3.381.0, status: unaffected], lessThanOrEqual: 2022.5.309.0, status: affected, version: 0, versionType: N/A
}
metrics:
cvssV3_1: [
attackComplexity: HIGH
attackVector: LOCAL
availabilityImpact: HIGH
baseScore: 7
baseSeverity: HIGH
confidentialityImpact: HIGH
integrityImpact: HIGH
privilegesRequired: LOW
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
version: 3.1
]
format: CVSS
scenarios: GENERAL