# CVE-2024-28755: Security feature bypass in n/a

> Attackers can force TLS version downgrades or cause denial of service by exploiting a session reset flaw in Mbed TLS.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 3 Apr 2024
- **Updated:** 6 Sep 2024
- **Also known as:** DEBIAN-CVE-2024-28755, GHSA-9w5c-29mx-552c

## What is CVE-2024-28755?

CVE-2024-28755 is a medium-severity vulnerability in n/a, published on 3 Apr 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An issue was discovered in Mbed TLS 3.5.x before 3.6.0. When an SSL context was reset with the mbedtls_ssl_session_reset() API, the maximum TLS version to be negotiated was not restored to the configured one. An attacker was able to prevent an Mbed TLS server from establishing any TLS 1.3 connection, potentially resulting in a Denial of Service or forced version downgrade from TLS 1.3 to TLS 1.2.

Weakness: CWE-326 (Inadequate Encryption Strength)

## Which versions are affected by CVE-2024-28755?

It affects 1 product.


Products: Trustedfirmware Mbed Tls.

## How do I fix CVE-2024-28755?

Upgrade to a fixed version.

## Is CVE-2024-28755 being exploited?

There is no known exploitation of CVE-2024-28755 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-2024-28755 and fix it if it is affected.

What it is: CVE-2024-28755 is a medium-severity vulnerability in n/a, published on 3 Apr 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2024-28755 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-2024-28755/ (Markdown: https://insights.sbomify.com/CVE-2024-28755/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-28755
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-28755
- OSV: https://osv.dev/vulnerability/CVE-2024-28755

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-28755/
Summaries are generated and may contain mistakes; the official description above is the record.