# CVE-2019-11856: ALEOS ACEView Message Replay

> Attackers can replay captured ACEView traffic to other gateways sharing credentials due to nonce reuse, bypassing authentication mechanisms.

- **Severity:** Low 3.3 (`CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 21 Aug 2020
- **Updated:** 17 Sep 2024
- **Also known as:** GHSA-h222-gcmc-vjfm

## What is CVE-2019-11856?

CVE-2019-11856 is a low-severity vulnerability in n/a, published on 21 Aug 2020. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

A nonce reuse vulnerability exists in the ACEView service of ALEOS before 4.13.0, 4.9.5, and 4.4.9 allowing message replay. Captured traffic to the ACEView service can be replayed to other gateways sharing the same credentials.

Weakness: CWE-294 (Authentication Bypass by Capture-replay)

## Which versions are affected by CVE-2019-11856?

It affects 1 product.


Products: Sierrawireless Aleos.

## How do I fix CVE-2019-11856?

No fix has been published for CVE-2019-11856 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-11856 being exploited?

There is no known exploitation of CVE-2019-11856 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2018-4063](https://insights.sbomify.com/CVE-2018-4063/): Sierra Wireless AirLink ALEOS Unrestricted Upload of File with Dangerous Type (high 8.8, exploited in the wild)
- [CVE-2015-2897](https://insights.sbomify.com/CVE-2015-2897/): Hardcoded credentials in n/a (critical 10.0)
- [CVE-2019-11851](https://insights.sbomify.com/CVE-2019-11851/): Memory corruption in n/a (critical 9.8)
- [CVE-2018-10251](https://insights.sbomify.com/CVE-2018-10251/): Missing authorization in n/a (critical 9.8)
- [CVE-2019-11857](https://insights.sbomify.com/CVE-2019-11857/): ALEOS AceManager Information Disclosure (critical 9.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-11856 and fix it if it is affected.

What it is: CVE-2019-11856 is a low-severity vulnerability in n/a, published on 21 Aug 2020. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2019-11856 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-2019-11856/ (Markdown: https://insights.sbomify.com/CVE-2019-11856/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-11856
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-11856
- OSV: https://osv.dev/vulnerability/CVE-2019-11856

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-11856/
Summaries are generated and may contain mistakes; the official description above is the record.