# CVE-2024-24766: CasaOS Username Enumeration

> An attacker can enumerate valid CasaOS usernames by observing distinct error messages for invalid users versus invalid passwords.

- **Severity:** Medium 6.2 (`CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 6 Mar 2024
- **Updated:** 1 Aug 2024
- **Also known as:** GHSA-c967-2652-gfjm, GO-2024-2615

## What is CVE-2024-24766?

CVE-2024-24766 is a medium-severity vulnerability in IceWhaleTech CasaOS-UserService, published on 6 Mar 2024. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

CasaOS-UserService provides user management functionalities to CasaOS. Starting in version 0.4.4.3 and prior to version 0.4.7, the Casa OS Login page disclosed the username enumeration vulnerability in the login page. An attacker can enumerate the CasaOS username using the application response. If the username is incorrect application gives the error `**User does not exist**`.  If the password is incorrect application gives the error `**Invalid password**`.  Version 0.4.7 fixes this issue.

Weakness: CWE-203 (Observable Discrepancy), CWE-204 (Observable Response Discrepancy)

## Which versions are affected by CVE-2024-24766?

3 open source packages ship an affected version, including github.com/IceWhaleTech/CasaOS-UserService. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `github.com/IceWhaleTech/CasaOS-UserService` | Go | From 0.4.4-3-alpha1 | 0.4.7 |
| `github.com/IceWhaleTech/CasaOS-UserService` | Go | From 0.4.4.3 | 0.4.7 |
| `github.com/IceWhaleTech/CasaOS-UserService` | Go | From 0.4.4.3 | 0.4.7 |

Products: Icewhale Casaos-Userservice.

## How do I fix CVE-2024-24766?

Upgrade github.com/IceWhaleTech/CasaOS-UserService to 0.4.7 or later.

## Is CVE-2024-24766 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-24766 exists.

## Other vulnerabilities in IceWhaleTech CasaOS-UserService

- [CVE-2024-28232](https://insights.sbomify.com/CVE-2024-28232/): Username Enumeration in CasaOS via bypass of CVE-2024-24766 (medium 6.2)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-24766 and fix it if it is affected.

What it is: CVE-2024-24766 is a medium-severity vulnerability in IceWhaleTech CasaOS-UserService, published on 6 Mar 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-24766 exists.

Affected packages and fixed versions:
- github.com/IceWhaleTech/CasaOS-UserService (Go): affected from 0.4.4-3-alpha1; fixed in 0.4.7
- github.com/IceWhaleTech/CasaOS-UserService (Go): affected from 0.4.4.3; fixed in 0.4.7
- github.com/IceWhaleTech/CasaOS-UserService (Go): affected from 0.4.4.3; fixed in 0.4.7

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-2024-24766/ (Markdown: https://insights.sbomify.com/CVE-2024-24766/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-24766
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-24766
- OSV: https://osv.dev/vulnerability/CVE-2024-24766

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-24766/
Summaries are generated and may contain mistakes; the official description above is the record.