# CVE-2018-5736: Denial of service in n/a

> An attacker can cause a denial of service in BIND by triggering an assertion failure through rapid zone transfers, crashing the named process.

- **Severity:** Medium 5.3 (`CVSS:3.0/AV:N/AC:H/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:** Yes
- **Published:** 16 Jan 2019
- **Updated:** 5 Aug 2024
- **Also known as:** ALPINE-CVE-2018-5736, GHSA-6p6q-g6w7-h5f9

## What is CVE-2018-5736?

CVE-2018-5736 is a medium-severity denial of service vulnerability in Isc Bind, published on 16 Jan 2019. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

An error in zone database reference counting can lead to an assertion failure if a server which is running an affected version of BIND attempts several transfers of a slave zone in quick succession. This defect could be deliberately exercised by an attacker who is permitted to cause a vulnerable server to initiate zone transfers (for example: by sending valid NOTIFY messages), causing the named process to exit after failing the assertion test. Affects BIND 9.12.0 and 9.12.1.

Weakness: CWE-617 (Reachable Assertion)

## Which versions are affected by CVE-2018-5736?

It affects 3 products.


Products: Isc Bind, Netapp Cloud Backup, Netapp Data Ontap Edge.

## How do I fix CVE-2018-5736?

Upgrade to a fixed version.

## Is CVE-2018-5736 being exploited?

There is no known exploitation of CVE-2018-5736 in the wild and no public exploit code.

## Other vulnerabilities in Isc Bind

- [CVE-2008-0122](https://insights.sbomify.com/CVE-2008-0122/): Memory corruption in n/a (critical 10.0)
- [CVE-2001-0010](https://insights.sbomify.com/CVE-2001-0010/): Memory corruption in n/a (critical 10.0)
- [CVE-2001-0011](https://insights.sbomify.com/CVE-2001-0011/): Memory corruption in n/a (critical 10.0)
- [CVE-2001-0013](https://insights.sbomify.com/CVE-2001-0013/): Memory corruption in n/a (critical 10.0)
- [CVE-2000-1029](https://insights.sbomify.com/CVE-2000-1029/): Memory corruption in n/a (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-5736 and fix it if it is affected.

What it is: CVE-2018-5736 is a medium-severity denial of service vulnerability in Isc Bind, published on 16 Jan 2019. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2018-5736 in the wild and no public exploit code.

Affected product: Isc Bind. 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-2018-5736/ (Markdown: https://insights.sbomify.com/CVE-2018-5736/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-5736
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-5736
- OSV: https://osv.dev/vulnerability/CVE-2018-5736

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-5736/
Summaries are generated and may contain mistakes; the official description above is the record.