# CVE-2024-28836: An issue was discovered in Mbed TLS 3.5.x before 3.6.0.


- **Severity:** Medium 5.4 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Fix available:** No
- **Published:** 3 Apr 2024
- **Updated:** 18 Nov 2024
- **Also known as:** GHSA-39fv-p94v-rg6c

## What is CVE-2024-28836?

CVE-2024-28836 is a medium-severity vulnerability in n/a, published on 3 Apr 2024. 

### Official description

An issue was discovered in Mbed TLS 3.5.x before 3.6.0. When negotiating the TLS version on the server side, it can fall back to the TLS 1.2 implementation of the protocol if it is disabled. If the TLS 1.2 implementation was disabled at build time, a TLS 1.2 client could put a TLS 1.3-only server into an infinite loop processing a TLS 1.2 ClientHello, resulting in a denial of service. If the TLS 1.2 implementation was disabled at runtime, a TLS 1.2 client can successfully establish a TLS 1.2 connection with the server.

Weakness: CWE-835 (Loop with Unreachable Exit Condition)

## Which versions are affected by CVE-2024-28836?

It affects 1 product.


Products: Trustedfirmware Mbed Tls.

## How do I fix CVE-2024-28836?

No fix has been published for CVE-2024-28836 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-28836 being exploited?

There is no known exploitation of CVE-2024-28836 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2026-34875](https://insights.sbomify.com/CVE-2026-34875/): Memory corruption in n/a (critical 9.8)
- [CVE-2024-49195](https://insights.sbomify.com/CVE-2024-49195/): Memory corruption in n/a (critical 9.8)
- [CVE-2024-45158](https://insights.sbomify.com/CVE-2024-45158/): Memory corruption in n/a (critical 9.8)
- [CVE-2024-45159](https://insights.sbomify.com/CVE-2024-45159/): Auth bypass in n/a (critical 9.8)
- [CVE-2023-45199](https://insights.sbomify.com/CVE-2023-45199/): Mbed TLS 3.2.x through 3.4.x before 3.5 has a Buffer Overflow that can lead to remote Code execution. (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-28836 and fix it if it is affected.

What it is: CVE-2024-28836 is a medium-severity vulnerability in n/a, published on 3 Apr 2024. 
Exploitation: There is no known exploitation of CVE-2024-28836 in the wild and no public exploit code.

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-2024-28836/ (Markdown: https://insights.sbomify.com/CVE-2024-28836/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-28836
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-28836
- OSV: https://osv.dev/vulnerability/CVE-2024-28836

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-28836/
Summaries are generated and may contain mistakes; the official description above is the record.