# CVE-2023-36483: MAS (a Carrier brand) MASmobile Classic Authorization Bypass

> Attackers can bypass authorization via session ID prediction to access sensitive customer and security data in MASmobile Classic apps.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 16 Mar 2024
- **Updated:** 28 Aug 2024
- **Also known as:** GHSA-vcjf-9862-c2x8

## What is CVE-2023-36483?

CVE-2023-36483 is a medium-severity authentication bypass vulnerability in MAS ASP.Net Services, published on 16 Mar 2024. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Authorization bypass can be achieved by session ID prediction in MASmobile Classic Android  version 1.16.18 and earlier and 

MASmobile Classic iOS version 1.7.24 and earlier

which allows remote attackers to retrieve sensitive data  including customer data, security system status, and event history.

Weakness: CWE-639 (Authorization Bypass Through User-Controlled Key)

## Which versions are affected by CVE-2023-36483?

It affects 2 products.


Products: Honeywell Masmobile Asp.net Services, Honeywell Masmobile Classic.

## How do I fix CVE-2023-36483?

No fix has been published for CVE-2023-36483 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-36483 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-36483 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-36483 and fix it if it is affected.

What it is: CVE-2023-36483 is a medium-severity authentication bypass vulnerability in MAS ASP.Net Services, published on 16 Mar 2024. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-36483 exists.

Affected product: MAS ASP.Net Services. 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-2023-36483/ (Markdown: https://insights.sbomify.com/CVE-2023-36483/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-36483
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-36483
- OSV: https://osv.dev/vulnerability/CVE-2023-36483

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-36483/
Summaries are generated and may contain mistakes; the official description above is the record.