# CVE-2023-37265: Incorrect identification of source IP addresses in CasaOS

> Unauthenticated attackers can execute arbitrary commands as root due to incorrect IP address verification in CasaOS.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 17 Jul 2023
- **Updated:** 12 Dec 2024
- **Also known as:** GHSA-vjh7-5r6x-xh6g, GO-2023-1932

## What is CVE-2023-37265?

CVE-2023-37265 is a critical authentication bypass vulnerability in IceWhaleTech CasaOS-Gateway, published on 17 Jul 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

CasaOS is an open-source Personal Cloud system. Due to a lack of IP address verification an unauthenticated attackers can execute arbitrary commands as `root` on CasaOS instances. The problem was addressed by improving the detection of client IP addresses in `391dd7f`. This patch is part of CasaOS 0.4.4. Users should upgrade to CasaOS 0.4.4. If they can't, they should temporarily restrict access to CasaOS to untrusted users, for instance by not exposing it publicly.

Weakness: CWE-306 (Missing Authentication for Critical Functionality)

## Which versions are affected by CVE-2023-37265?

3 open source packages ship an affected version, including github.com/IceWhaleTech/CasaOS-Gateway. It affects 2 products.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `github.com/IceWhaleTech/CasaOS-Gateway` | Go | All versions | 0.4.4 |
| `github.com/IceWhaleTech/CasaOS-Gateway` | Go | All versions | 0.4.4 |
| `github.com/IceWhaleTech/CasaOS-Gateway` | Go | All versions | 0.4.4 |

Products: Icewhale Casaos, Icewhale Casaos-Gateway.

## How do I fix CVE-2023-37265?

Upgrade github.com/IceWhaleTech/CasaOS-Gateway to 0.4.4 or later.

## Is CVE-2023-37265 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-37265 exists.

Public exploit code:

- CasaOS  < 0.4.4 - Authentication Bypass via Internal IP (nuclei): http/cves/2023/CVE-2023-37265.yaml

## Other vulnerabilities in IceWhaleTech CasaOS-Gateway

- [CVE-2023-37266](https://insights.sbomify.com/CVE-2023-37266/): Weak json web token (JWT) secrets in CasaOS (critical 9.8)
- [CVE-2022-24193](https://insights.sbomify.com/CVE-2022-24193/): Command Injection in CasaOS (critical 9.8)
- [CVE-2024-24767](https://insights.sbomify.com/CVE-2024-24767/): CasaOS Improper Restriction of Excessive Authentication Attempts vulnerability (critical 9.1)
- [CVE-2023-37469](https://insights.sbomify.com/CVE-2023-37469/): CasaOS Command Injection vulnerability (high 8.8)
- [CVE-2024-24765](https://insights.sbomify.com/CVE-2024-24765/): CasaOS-UserService allows unauthorized access to any file (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-37265 and fix it if it is affected.

What it is: CVE-2023-37265 is a critical authentication bypass vulnerability in IceWhaleTech CasaOS-Gateway, published on 17 Jul 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-37265 exists.

Affected packages and fixed versions:
- github.com/IceWhaleTech/CasaOS-Gateway (Go): affected all versions; fixed in 0.4.4
- github.com/IceWhaleTech/CasaOS-Gateway (Go): affected all versions; fixed in 0.4.4
- github.com/IceWhaleTech/CasaOS-Gateway (Go): affected all versions; fixed in 0.4.4

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-2023-37265/ (Markdown: https://insights.sbomify.com/CVE-2023-37265/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-37265
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-37265
- OSV: https://osv.dev/vulnerability/CVE-2023-37265

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-37265/
Summaries are generated and may contain mistakes; the official description above is the record.