# CVE-2019-14902: Missing authorization in samba

> Attackers can retain unauthorized permissions to create or modify subtrees on domain controllers after rights are revoked, leading to privilege escalation.

- **Severity:** Medium 5.4 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/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:** 21 Jan 2020
- **Updated:** 5 Aug 2024
- **Also known as:** ALPINE-CVE-2019-14902, DEBIAN-CVE-2019-14902, ECHO-54fa-c6e5-257c, GHSA-h5p3-7352-mh38, UBUNTU-CVE-2019-14902

## What is CVE-2019-14902?

CVE-2019-14902 is a medium-severity missing authorization vulnerability in Canonical Ubuntu Linux, published on 21 Jan 2020. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

There is an issue in all samba 4.11.x versions before 4.11.5, all samba 4.10.x versions before 4.10.12 and all samba 4.9.x versions before 4.9.18, where the removal of the right to create or modify a subtree would not automatically be taken away on all domain controllers.

Weakness: CWE-284 (Improper Access Control)

## Which versions are affected by CVE-2019-14902?

It affects 4 products.


Products: Canonical Ubuntu Linux, Debian Debian Linux, Opensuse Leap, Samba Samba.

## How do I fix CVE-2019-14902?

Upgrade to a fixed version.

## Is CVE-2019-14902 being exploited?

There is no known exploitation of CVE-2019-14902 in the wild and no public exploit code.

## Other vulnerabilities in Canonical Ubuntu Linux

- [CVE-2020-11651](https://insights.sbomify.com/CVE-2020-11651/): SaltStack Salt Authentication Bypass (critical 9.8, exploited in the wild)
- [CVE-2020-7247](https://insights.sbomify.com/CVE-2020-7247/): OpenSMTPD Remote Code Execution (critical 9.8, exploited in the wild)
- [CVE-2019-16928](https://insights.sbomify.com/CVE-2019-16928/): Exim Out-of-bounds Write (critical 9.8, exploited in the wild)
- [CVE-2018-6789](https://insights.sbomify.com/CVE-2018-6789/): Exim Buffer Overflow (critical 9.8, exploited in the wild)
- [CVE-2015-2590](https://insights.sbomify.com/CVE-2015-2590/): Oracle Java SE and Java SE Embedded Remote Code Execution (critical 9.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-14902 and fix it if it is affected.

What it is: CVE-2019-14902 is a medium-severity missing authorization vulnerability in Canonical Ubuntu Linux, published on 21 Jan 2020. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2019-14902 in the wild and no public exploit code.

Affected product: Canonical Ubuntu Linux. 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-2019-14902/ (Markdown: https://insights.sbomify.com/CVE-2019-14902/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-14902
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-14902
- OSV: https://osv.dev/vulnerability/CVE-2019-14902

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From sbomify Insights: https://insights.sbomify.com/CVE-2019-14902/
Summaries are generated and may contain mistakes; the official description above is the record.