# CVE-2023-1862: Remote access to warp-svc.exe in Cloudflare WARP

> Remote attackers can access WARP service controls and configuration data via IPC pipes if network restrictions and authentication settings are permissive.

- **Severity:** High 7.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 20 Jun 2023
- **Updated:** 9 Dec 2024

## What is CVE-2023-1862?

CVE-2023-1862 is a high-severity missing authorization vulnerability in Cloudflare WARP Client, published on 20 Jun 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Cloudflare WARP client for Windows (up to v2023.3.381.0) allowed a malicious actor to remotely access the warp-svc.exe binary due to an insufficient access control policy on an IPC Named Pipe. This would have enabled an attacker to trigger WARP connect and disconnect commands, as well as obtaining network diagnostics and application configuration from the target's device. It is important to note that in order to exploit this, a set of requirements would need to be met, such as the target's device must've been reachable on port 445, allowed authentication with NULL sessions or otherwise having knowledge of the target's credentials.

Weakness: CWE-284 (Improper Access Control)

## Which versions are affected by CVE-2023-1862?

It affects 1 product.


Products: Cloudflare Warp.

## How do I fix CVE-2023-1862?

No fix has been published for CVE-2023-1862 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-1862 being exploited?

There is no known exploitation of CVE-2023-1862 in the wild and no public exploit code.

## Other vulnerabilities in Cloudflare WARP Client

- [CVE-2022-4428](https://insights.sbomify.com/CVE-2022-4428/): support_uri validation missing in WARP client for Windows (high 8.9)
- [CVE-2022-2225](https://insights.sbomify.com/CVE-2022-2225/): Zero Trust Secure Web Gateway policies bypass using WARP client subcommands (high 8.1)
- [CVE-2023-2754](https://insights.sbomify.com/CVE-2023-2754/): Plaintext transmission of DNS requests in Windows 1.1.1.1 WARP client (high 7.4)
- [CVE-2023-0652](https://insights.sbomify.com/CVE-2023-0652/): Local Privilege Escalation in Cloudflare WARP Installer (Windows) (high 7.0)
- [CVE-2023-1412](https://insights.sbomify.com/CVE-2023-1412/): Local Privilege Escalation Vulnerability in WARP's MSI Installer (high 7.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-1862 and fix it if it is affected.

What it is: CVE-2023-1862 is a high-severity missing authorization vulnerability in Cloudflare WARP Client, published on 20 Jun 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-1862 in the wild and no public exploit code.

Affected product: Cloudflare WARP Client. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2023-1862/ (Markdown: https://insights.sbomify.com/CVE-2023-1862/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-1862
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-1862
- OSV: https://osv.dev/vulnerability/CVE-2023-1862

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-1862/
Summaries are generated and may contain mistakes; the official description above is the record.