# CVE-2023-3243: Weak cryptography in BCM-WEB

> Attackers can capture weak MD5 hashes to create sessions or brute-force passwords, leading to unauthorized access in the unsupported BCM-WEB product.

- **Severity:** High 8.3 (`CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 28 Jun 2023
- **Updated:** 2 Aug 2024
- **Also known as:** GHSA-2h66-xfr5-9c8f

## What is CVE-2023-3243?

CVE-2023-3243 is a high-severity vulnerability in Alerton BCM-WEB, published on 28 Jun 2023. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

** UNSUPPORTED WHEN ASSIGNED ** [An attacker can capture an authenticating hash
and utilize it to create new sessions. The hash is also a poorly salted MD5
hash, which could result in a successful brute force password attack. Impacted product is BCM-WEB version 3.3.X. Recommended fix:  Upgrade to a supported product such
as Alerton
ACM.] Out of an abundance of caution, this CVE ID is being assigned to 
better serve our customers and ensure all who are still running this product understand 
that the product is end of life and should be removed or upgraded.

Weakness: CWE-326 (Inadequate Encryption Strength), CWE-290 (Authentication Bypass by Spoofing)

## Which versions are affected by CVE-2023-3243?

It affects 1 product.


Products: Honeywell Alerton Bcm-Web Firmware.

## How do I fix CVE-2023-3243?

No fix has been published for CVE-2023-3243 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-3243 being exploited?

There is no known exploitation of CVE-2023-3243 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-3243 and fix it if it is affected.

What it is: CVE-2023-3243 is a high-severity vulnerability in Alerton BCM-WEB, published on 28 Jun 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-3243 in the wild and no public exploit code.

Affected product: Alerton BCM-WEB. 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-2023-3243/ (Markdown: https://insights.sbomify.com/CVE-2023-3243/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-3243
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-3243
- OSV: https://osv.dev/vulnerability/CVE-2023-3243

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-3243/
Summaries are generated and may contain mistakes; the official description above is the record.