# CVE-2020-24342: Memory corruption in n/a

> A flaw in Lua's stack protection mechanism allows attackers to trigger memory corruption, potentially leading to code execution or denial of service.

- **Severity:** High 7.8 (`CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 13 Aug 2020
- **Updated:** 4 Aug 2024
- **Also known as:** BIT-lua-2020-24342, DEBIAN-CVE-2020-24342, GHSA-ggfm-9pxx-qx8r

## What is CVE-2020-24342?

CVE-2020-24342 is a high-severity memory corruption vulnerability in Fedoraproject Fedora, published on 13 Aug 2020. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

Lua through 5.4.0 allows a stack redzone cross in luaO_pushvfstring because a protection mechanism wrongly calls luaD_callnoyield twice in a row.

Weakness: CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2020-24342?

1 open source package ship an affected version, including lua. It affects 2 products.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `lua` | Bitnami | From 5.4.0 | 5.4.1 |

Products: Fedoraproject Fedora, Lua Lua.

## How do I fix CVE-2020-24342?

Upgrade lua to 5.4.1 or later.

## Is CVE-2020-24342 being exploited?

There is no known exploitation of CVE-2020-24342 in the wild and no public exploit code.

## Other vulnerabilities in Fedoraproject Fedora

- [CVE-2024-4577](https://insights.sbomify.com/CVE-2024-4577/): PHP-CGI OS Command Injection (critical 9.8, exploited in the wild)
- [CVE-2021-39226](https://insights.sbomify.com/CVE-2021-39226/): Grafana Authentication Bypass (critical 9.8, exploited in the wild)
- [CVE-2019-5544](https://insights.sbomify.com/CVE-2019-5544/): VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow (critical 9.8, exploited in the wild)
- [CVE-2024-4947](https://insights.sbomify.com/CVE-2024-4947/): Google Chromium V8 Type Confusion (critical 9.6, exploited in the wild)
- [CVE-2024-4671](https://insights.sbomify.com/CVE-2024-4671/): Google Chromium Visuals Use-After-Free (critical 9.6, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-24342 and fix it if it is affected.

What it is: CVE-2020-24342 is a high-severity memory corruption vulnerability in Fedoraproject Fedora, published on 13 Aug 2020. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2020-24342 in the wild and no public exploit code.

Affected packages and fixed versions:
- lua (Bitnami): affected from 5.4.0; fixed in 5.4.1

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-2020-24342/ (Markdown: https://insights.sbomify.com/CVE-2020-24342/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-24342
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-24342
- OSV: https://osv.dev/vulnerability/CVE-2020-24342

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-24342/
Summaries are generated and may contain mistakes; the official description above is the record.