CVE-2023-3747 Insufficient Validation on Override Codes for Always-Enabled WARP Mode
Local attackers can bypass WARP security enforcement by manipulating system time to extend override code validity, requiring administrator-created override codes.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2023-3747?
CVE-2023-3747 is a medium-severity vulnerability in Cloudflare WARP Client, published on 7 Sep 2023. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official 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.
Which versions are affected by CVE-2023-3747?
It affects 1 product.
Products include Cloudflare Warp.
How do I fix CVE-2023-3747?
No fix has been published for CVE-2023-3747 yet. Limit exposure of the affected software until one is available.
Is CVE-2023-3747 being exploited?
There is no known exploitation of CVE-2023-3747 in the wild and no public exploit code.
Other vulnerabilities in Cloudflare WARP Client
- CVE-2022-4428 support_uri validation missing in WARP client for Windows
- CVE-2022-2225 Zero Trust Secure Web Gateway policies bypass using WARP client subcommands
- CVE-2023-2754 Plaintext transmission of DNS requests in Windows 1.1.1.1 WARP client
- CVE-2023-1862 Remote access to warp-svc.exe in Cloudflare WARP
- CVE-2023-0652 Local Privilege Escalation in Cloudflare WARP Installer (Windows)