# CVE-2023-36243: Memory corruption in n/a

> A buffer overflow in FLVMeta allows attackers to execute arbitrary code or cause denial of service via crafted metadata.

- **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:** 22 Jun 2023
- **Updated:** 2 Dec 2024
- **Also known as:** DEBIAN-CVE-2023-36243, GHSA-4gv5-7vgw-rh3h, UBUNTU-CVE-2023-36243

## What is CVE-2023-36243?

CVE-2023-36243 is a high-severity memory corruption vulnerability in n/a, published on 22 Jun 2023. 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

FLVMeta v1.2.1 was discovered to contain a buffer overflow via the xml_on_metadata_tag_only function at dump_xml.c.

Weakness: CWE-120 (Buffer Copy without Checking Size of Input)

## Which versions are affected by CVE-2023-36243?

It affects 1 product.


Products: Flvmeta Flvmeta.

## How do I fix CVE-2023-36243?

Upgrade to a fixed version.

## Is CVE-2023-36243 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-36243 exists.

## Other vulnerabilities in n/a

- [CVE-2024-25385](https://insights.sbomify.com/CVE-2024-25385/): Use after free in n/a (medium 6.2)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-36243 and fix it if it is affected.

What it is: CVE-2023-36243 is a high-severity memory corruption vulnerability in n/a, published on 22 Jun 2023. 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: It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-36243 exists.

Affected product: n/a. 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-2023-36243/ (Markdown: https://insights.sbomify.com/CVE-2023-36243/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-36243
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-36243
- OSV: https://osv.dev/vulnerability/CVE-2023-36243

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-36243/
Summaries are generated and may contain mistakes; the official description above is the record.