# CVE-2018-5741: Update policies krb5-subdomain and ms-subdomain do not enforce controls promised in their documentation

> Incorrect documentation of BIND update-policy rules may lead administrators to configure less restrictive DNS update permissions than intended.

- **Severity:** Medium 6.5 (`CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N`)
- **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:** 17 Sep 2024
- **Also known as:** ALPINE-CVE-2018-5741, CLSA-2022-1657560205, CLSA-2022-1657561196, DEBIAN-CVE-2018-5741, GHSA-ghpp-72v8-mpmv, RHSA-2019:2057, UBUNTU-CVE-2018-5741

## What is CVE-2018-5741?

CVE-2018-5741 is a medium-severity missing authorization 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

To provide fine-grained controls over the ability to use Dynamic DNS (DDNS) to update records in a zone, BIND 9 provides a feature called update-policy. Various rules can be configured to limit the types of updates that can be performed by a client, depending on the key used when sending the update request. Unfortunately, some rule types were not initially documented, and when documentation for them was added to the Administrator Reference Manual (ARM) in change #3112, the language that was added to the ARM at that time incorrectly described the behavior of two rule types, krb5-subdomain and ms-subdomain. This incorrect documentation could mislead operators into believing that policies they had configured were more restrictive than they actually were. This affects BIND versions prior to BIND 9.11.5 and BIND 9.12.3.

Weakness: CWE-863 (Incorrect Authorization)

## Which versions are affected by CVE-2018-5741?

It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `bind` | Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-9.P2.el7 |
| `bind-chroot` | Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-9.P2.el7 |
| `bind-debuginfo` | Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-9.P2.el7 |
| `bind-devel` | Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-9.P2.el7 |
| `bind-export-devel` | Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-9.P2.el7 |
| `bind-export-libs` | Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-9.P2.el7 |
| `bind-libs` | Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-9.P2.el7 |
| `bind-libs-lite` | Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-9.P2.el7 |
| `bind-license` | Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-9.P2.el7 |
| `bind-lite-devel` | Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-9.P2.el7 |
| `bind-pkcs11` | Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-9.P2.el7 |
| `bind-pkcs11-devel` | Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-9.P2.el7 |
| `bind-pkcs11-libs` | Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-9.P2.el7 |
| `bind-pkcs11-utils` | Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-9.P2.el7 |
| `bind-sdb` | Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-9.P2.el7 |
| `bind-sdb-chroot` | Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-9.P2.el7 |
| `bind-utils` | Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-9.P2.el7 |
| `bind` | Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-9.P2.el7 |
| `bind-chroot` | Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-9.P2.el7 |
| `bind-debuginfo` | Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-9.P2.el7 |
| `bind-devel` | Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-9.P2.el7 |
| `bind-export-devel` | Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-9.P2.el7 |
| `bind-export-libs` | Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-9.P2.el7 |
| `bind-libs` | Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-9.P2.el7 |
| `bind-libs-lite` | Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-9.P2.el7 |
| `bind-license` | Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-9.P2.el7 |
| `bind-lite-devel` | Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-9.P2.el7 |
| `bind-pkcs11` | Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-9.P2.el7 |
| `bind-pkcs11-devel` | Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-9.P2.el7 |
| `bind-pkcs11-libs` | Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-9.P2.el7 |
| `bind-pkcs11-utils` | Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-9.P2.el7 |
| `bind-sdb` | Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-9.P2.el7 |
| `bind-sdb-chroot` | Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-9.P2.el7 |
| `bind-utils` | Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-9.P2.el7 |
| `bind` | Red Hat:enterprise_linux:7::server | All versions | 32:9.11.4-9.P2.el7 |
| `bind-chroot` | Red Hat:enterprise_linux:7::server | All versions | 32:9.11.4-9.P2.el7 |
| `bind-debuginfo` | Red Hat:enterprise_linux:7::server | All versions | 32:9.11.4-9.P2.el7 |
| `bind-devel` | Red Hat:enterprise_linux:7::server | All versions | 32:9.11.4-9.P2.el7 |
| `bind-export-devel` | Red Hat:enterprise_linux:7::server | All versions | 32:9.11.4-9.P2.el7 |
| `bind-export-libs` | Red Hat:enterprise_linux:7::server | All versions | 32:9.11.4-9.P2.el7 |

Products: Isc Bind.

## How do I fix CVE-2018-5741?

Upgrade to a fixed version.

## Is CVE-2018-5741 being exploited?

There is no known exploitation of CVE-2018-5741 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-2018-5741 and fix it if it is affected.

What it is: CVE-2018-5741 is a medium-severity missing authorization 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-2018-5741 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-2018-5741/ (Markdown: https://insights.sbomify.com/CVE-2018-5741/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-5741
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-5741
- OSV: https://osv.dev/vulnerability/CVE-2018-5741

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-5741/
Summaries are generated and may contain mistakes; the official description above is the record.