# CVE-2024-3187: Use after free in GoAhead

> Remote attackers with template modification privileges can trigger use-after-free errors in GoAhead, causing denial of service or potential code execution.

- **Severity:** Medium 5.9 (`CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 17 Oct 2024
- **Updated:** 17 Oct 2024
- **Also known as:** GHSA-49c2-3ppg-7626

## What is CVE-2024-3187?

CVE-2024-3187 is a medium-severity use after free vulnerability in EmbedThis GoAhead, published on 17 Oct 2024. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

This issue tracks two CWE-416 Use After Free (UAF) and one CWE-415 Double Free vulnerabilities in Goahead versions <= 6.0.0. These are caused by JST values not being nulled when freed during parsing of JST templates. If the ME_GOAHEAD_JAVASCRIPT flag is enabled, a remote attacker with the privileges to modify JavaScript template (JST) files could exploit this by providing malicious templates. This may lead to memory corruption, potentially causing a Denial of Service (DoS) or, in rare cases, code execution, though the latter is highly context-dependent.

Weakness: CWE-416 (Use After Free), CWE-415 (Double Free)

## Which versions are affected by CVE-2024-3187?


## How do I fix CVE-2024-3187?

No fix has been published for CVE-2024-3187 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-3187 being exploited?

There is no known exploitation of CVE-2024-3187 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-3187 and fix it if it is affected.

What it is: CVE-2024-3187 is a medium-severity use after free vulnerability in EmbedThis GoAhead, published on 17 Oct 2024. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2024-3187 in the wild and no public exploit code.

Affected product: EmbedThis GoAhead. 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-2024-3187/ (Markdown: https://insights.sbomify.com/CVE-2024-3187/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-3187
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-3187
- OSV: https://osv.dev/vulnerability/CVE-2024-3187

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-3187/
Summaries are generated and may contain mistakes; the official description above is the record.