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support_uri validation missing in WARP client for Windows

High
mskowroncf published GHSA-h3j3-fhqg-66rh Jan 11, 2023

Package

Cloudflare WARP Client (Windows)

Affected versions

<=2022.10.106.0

Patched versions

>=2022.12.476.0

Description

Impact

support_uri parameter in the WARP client local settings file (mdm.xml) lacked proper validation which allowed for privilege escalation and launching an arbitrary executable on the local machine upon clicking on the "Send feedback" option. An attacker with access to the local file system could use a crafted XML config file pointing to a malicious file or set a local path to the executable using Cloudflare Zero Trust Dashboard (for Zero Trust enrolled clients).

Patches

Upgrade to the latest version (>=2022.12.476.0)

References

Cloudflare WARP
Release notes

Severity

High
8.9
/ 10

CVSS base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
Low
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:L

CVE ID

CVE-2022-4428

Weaknesses

Credits