# CVE-2018-12228: Denial of service in n/a

> A remote attacker can cause a denial of service in Asterisk by triggering an infinite loop via abrupt disconnection or crafted messages.

- **Severity:** Medium 6.5 (`CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H`)
- **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:** 12 Jun 2018
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-wcxf-gxv3-7xch

## What is CVE-2018-12228?

CVE-2018-12228 is a medium-severity denial of service vulnerability in n/a, published on 12 Jun 2018. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

An issue was discovered in Asterisk Open Source 15.x before 15.4.1. When connected to Asterisk via TCP/TLS, if the client abruptly disconnects, or sends a specially crafted message, then Asterisk gets caught in an infinite loop while trying to read the data stream. This renders the system unusable.

Weakness: CWE-835 (Loop with Unreachable Exit Condition)

## Which versions are affected by CVE-2018-12228?

It affects 1 product.


Products: Sangoma Asterisk.

## How do I fix CVE-2018-12228?

No fix has been published for CVE-2018-12228 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-12228 being exploited?

There is no known exploitation of CVE-2018-12228 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2024-57520](https://insights.sbomify.com/CVE-2024-57520/): Path traversal in n/a (critical 9.8)
- [CVE-2025-47779](https://insights.sbomify.com/CVE-2025-47779/): Using malformed From header can forge identity with ";" or NULL in name portion (high 7.7)
- [CVE-2025-57767](https://insights.sbomify.com/CVE-2025-57767/): Asterisk can crash from a specifically malformed Authorization header in an incoming SIP request (high 7.5)
- [CVE-2022-37325](https://insights.sbomify.com/CVE-2022-37325/): Memory corruption in n/a (high 7.5)
- [CVE-2025-1131](https://insights.sbomify.com/CVE-2025-1131/): Asterisk Unsafe Shell Sourcing in safe_asterisk Leads to Local Privilege Escalation (high 7.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-12228 and fix it if it is affected.

What it is: CVE-2018-12228 is a medium-severity denial of service vulnerability in n/a, published on 12 Jun 2018. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2018-12228 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-2018-12228/ (Markdown: https://insights.sbomify.com/CVE-2018-12228/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-12228
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-12228
- OSV: https://osv.dev/vulnerability/CVE-2018-12228

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-12228/
Summaries are generated and may contain mistakes; the official description above is the record.