# CVE-2019-6465: Zone transfer controls for writable DLZ zones were not effective

> Attackers can bypass zone transfer restrictions on writable Dynamically Loadable Zones in BIND, potentially exposing sensitive DNS data.

- **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:** Yes
- **Published:** 9 Oct 2019
- **Updated:** 16 Sep 2024
- **Also known as:** ALPINE-CVE-2019-6465, DEBIAN-CVE-2019-6465, GHSA-5hgv-gr6q-xvqx, UBUNTU-CVE-2019-6465

## What is CVE-2019-6465?

CVE-2019-6465 is a medium-severity missing authorization vulnerability in Isc Bind, published on 9 Oct 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Controls for zone transfers may not be properly applied to Dynamically Loadable Zones (DLZs) if the zones are writable Versions affected: BIND 9.9.0 -> 9.10.8-P1, 9.11.0 -> 9.11.5-P2, 9.12.0 -> 9.12.3-P2, and versions 9.9.3-S1 -> 9.11.5-S3 of BIND 9 Supported Preview Edition. Versions 9.13.0 -> 9.13.6 of the 9.13 development branch are also affected. Versions prior to BIND 9.9.0 have not been evaluated for vulnerability to CVE-2019-6465.

Weakness: CWE-732 (Incorrect Permission Assignment for Critical Resource)

## Which versions are affected by CVE-2019-6465?

It affects 2 products.


Products: Isc Bind, Redhat Enterprise Linux.

## How do I fix CVE-2019-6465?

Upgrade to a fixed version.

## Is CVE-2019-6465 being exploited?

There is no known exploitation of CVE-2019-6465 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-2019-6465 and fix it if it is affected.

What it is: CVE-2019-6465 is a medium-severity missing authorization vulnerability in Isc Bind, published on 9 Oct 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-2019-6465 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-2019-6465/ (Markdown: https://insights.sbomify.com/CVE-2019-6465/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-6465
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-6465
- OSV: https://osv.dev/vulnerability/CVE-2019-6465

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-6465/
Summaries are generated and may contain mistakes; the official description above is the record.