# CVE-2023-34337: Inadequate Encryption Strength

> Attackers can exploit weak HMAC encryption in AMI MegaRAC SPx BMC firmware to compromise confidentiality, integrity, and availability.

- **Severity:** High 7.6 (`CVSS:3.1/AV:A/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 5 Jul 2023
- **Updated:** 20 Nov 2024
- **Also known as:** GHSA-69h6-426q-xx8g

## What is CVE-2023-34337?

CVE-2023-34337 is a high-severity vulnerability in AMI MegaRAC_SPx, published on 5 Jul 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

AMI SPx contains a vulnerability in the BMC where a user may cause an inadequate encryption strength by hash-based message authentication code (HMAC). A successful exploit of this vulnerability may lead to a loss of confidentiality, integrity, and availability.

Weakness: CWE-326 (Inadequate Encryption Strength)

## Which versions are affected by CVE-2023-34337?

It affects 1 product.


Products: Ami Megarac Sp-X.

## How do I fix CVE-2023-34337?

No fix has been published for CVE-2023-34337 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-34337 being exploited?

There is no known exploitation of CVE-2023-34337 in the wild and no public exploit code.

## Other vulnerabilities in AMI MegaRAC_SPx

- [CVE-2024-54085](https://insights.sbomify.com/CVE-2024-54085/): AMI MegaRAC SPx Authentication Bypass by Spoofing (critical 10.0, exploited in the wild)
- [CVE-2023-3043](https://insights.sbomify.com/CVE-2023-3043/): Stack-based Buffer Overflow BMC (critical 9.6)
- [CVE-2023-37293](https://insights.sbomify.com/CVE-2023-37293/): stack-based buffer overflow (critical 9.6)
- [CVE-2023-34329](https://insights.sbomify.com/CVE-2023-34329/): Authentication Bypass via HTTP Header Spoofing (critical 9.1)
- [CVE-2023-28863](https://insights.sbomify.com/CVE-2023-28863/): Other in n/a (critical 9.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-34337 and fix it if it is affected.

What it is: CVE-2023-34337 is a high-severity vulnerability in AMI MegaRAC_SPx, published on 5 Jul 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: There is no known exploitation of CVE-2023-34337 in the wild and no public exploit code.

Affected product: AMI MegaRAC_SPx. 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-2023-34337/ (Markdown: https://insights.sbomify.com/CVE-2023-34337/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-34337
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-34337
- OSV: https://osv.dev/vulnerability/CVE-2023-34337

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-34337/
Summaries are generated and may contain mistakes; the official description above is the record.