# CVE-2024-21855: Auth bypass in GoCast

> An unauthenticated attacker can execute arbitrary commands via the GoCast HTTP API due to missing authentication checks.

- **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:** No
- **Published:** 21 Nov 2024
- **Updated:** 21 Nov 2024
- **Also known as:** GHSA-c6qm-82c6-q92v

## What is CVE-2024-21855?

CVE-2024-21855 is a critical authentication bypass vulnerability in GoCast, published on 21 Nov 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A lack of authentication vulnerability exists in the HTTP API functionality of GoCast 1.1.3. A specially crafted HTTP request can lead to arbitrary command execution. An attacker can make an unauthenticated HTTP request to trigger this vulnerability.

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

## Which versions are affected by CVE-2024-21855?

It affects 1 product.


Products: Mayuresh82 Gocast.

## How do I fix CVE-2024-21855?

No fix has been published for CVE-2024-21855 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-21855 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-21855 exists.

## Other vulnerabilities in GoCast

- [CVE-2024-28892](https://insights.sbomify.com/CVE-2024-28892/): GoCast OS Command Injection vulnerability (critical 9.8)
- [CVE-2024-29224](https://insights.sbomify.com/CVE-2024-29224/): Command injection in GoCast (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-21855 and fix it if it is affected.

What it is: CVE-2024-21855 is a critical authentication bypass vulnerability in GoCast, published on 21 Nov 2024. 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-2024-21855 exists.

Affected product: GoCast. 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-2024-21855/ (Markdown: https://insights.sbomify.com/CVE-2024-21855/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-21855
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-21855
- OSV: https://osv.dev/vulnerability/CVE-2024-21855

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-21855/
Summaries are generated and may contain mistakes; the official description above is the record.