# CVE-2018-18976: Missing authorization in n/a

> Attackers can retrieve encrypted medical data of any user by manipulating user ID values in the Ascensia cloud platform mobile application.

- **Severity:** Medium 5.3 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 6 May 2019
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-qqmm-m936-j5v9

## What is CVE-2018-18976?

CVE-2018-18976 is a medium-severity missing authorization vulnerability in n/a, published on 6 May 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An issue was discovered in the Ascensia Contour NEXT ONE application for iOS and Android before 2019-01-15. An attacker may retrieve encrypted medical information of any user of the Ascensia cloud platform by performing Direct Object References with a series of user ID values. (This information can be decrypted through a different vulnerability.)

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

## Which versions are affected by CVE-2018-18976?

It affects 1 product.


Products: Ascensia Contour Diabetes.

## How do I fix CVE-2018-18976?

No fix has been published for CVE-2018-18976 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-18976 being exploited?

There is no known exploitation of CVE-2018-18976 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2018-18975](https://insights.sbomify.com/CVE-2018-18975/): Weak cryptography in n/a (high 7.5)
- [CVE-2018-18977](https://insights.sbomify.com/CVE-2018-18977/): Information disclosure in n/a (high 7.5)
- [CVE-2018-18978](https://insights.sbomify.com/CVE-2018-18978/): Hardcoded credentials in n/a (high 7.4)
- [CVE-2018-18979](https://insights.sbomify.com/CVE-2018-18979/): Hardcoded credentials in n/a (high 7.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-18976 and fix it if it is affected.

What it is: CVE-2018-18976 is a medium-severity missing authorization vulnerability in n/a, published on 6 May 2019. 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-2018-18976 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-2018-18976/ (Markdown: https://insights.sbomify.com/CVE-2018-18976/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-18976
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-18976
- OSV: https://osv.dev/vulnerability/CVE-2018-18976

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-18976/
Summaries are generated and may contain mistakes; the official description above is the record.