# CVE-2019-6468: BIND Supported Preview Edition can exit with an assertion failure if nxdomain-redirect is used

> Attackers can cause a denial of service in BIND Supported Preview Edition by triggering an assertion failure when nxdomain-redirect is enabled.

- **Severity:** Medium 5.3 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 9 Oct 2019
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-6r46-vvmw-c9mc

## What is CVE-2019-6468?

CVE-2019-6468 is a medium-severity denial of service 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

In BIND Supported Preview Edition, an error in the nxdomain-redirect feature can occur in versions which support EDNS Client Subnet (ECS) features. In those versions which have ECS support, enabling nxdomain-redirect is likely to lead to BIND exiting due to assertion failure. Versions affected: BIND Supported Preview Edition version 9.10.5-S1 -> 9.11.5-S5. ONLY BIND Supported Preview Edition releases are affected.

Weakness: CWE-617 (Reachable Assertion)

## Which versions are affected by CVE-2019-6468?

It affects 1 product.


Products: Isc Bind.

## How do I fix CVE-2019-6468?

No fix has been published for CVE-2019-6468 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-6468 being exploited?

There is no known exploitation of CVE-2019-6468 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-2019-6468 and fix it if it is affected.

What it is: CVE-2019-6468 is a medium-severity denial of service 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-2019-6468 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-2019-6468/ (Markdown: https://insights.sbomify.com/CVE-2019-6468/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-6468
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-6468
- OSV: https://osv.dev/vulnerability/CVE-2019-6468

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-6468/
Summaries are generated and may contain mistakes; the official description above is the record.