# CVE-2019-14847: Null dereference in samba

> An attacker can crash the Samba Active Directory Domain Controller LDAP server via dirsync, causing a denial of service.

- **Severity:** Medium 4.9 (`CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 6 Nov 2019
- **Updated:** 5 Aug 2024
- **Also known as:** ALPINE-CVE-2019-14847, DEBIAN-CVE-2019-14847, ECHO-afc5-d60f-8677, GHSA-fc52-9g4r-5jw7, UBUNTU-CVE-2019-14847

## What is CVE-2019-14847?

CVE-2019-14847 is a medium-severity vulnerability in Fedoraproject Fedora, published on 6 Nov 2019. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

A flaw was found in samba 4.0.0 before samba 4.9.15 and samba 4.10.x before 4.10.10. An attacker can crash AD DC LDAP server via dirsync resulting in denial of service. Privilege escalation is not possible with this issue.

Weakness: CWE-476 (NULL Pointer Dereference)

## Which versions are affected by CVE-2019-14847?

It affects 3 products.


Products: Fedoraproject Fedora, Opensuse Leap, Samba Samba.

## How do I fix CVE-2019-14847?

Upgrade to a fixed version.

## Is CVE-2019-14847 being exploited?

There is no known exploitation of CVE-2019-14847 in the wild and no public exploit code.

## Other vulnerabilities in Fedoraproject Fedora

- [CVE-2024-4577](https://insights.sbomify.com/CVE-2024-4577/): PHP-CGI OS Command Injection (critical 9.8, exploited in the wild)
- [CVE-2021-39226](https://insights.sbomify.com/CVE-2021-39226/): Grafana Authentication Bypass (critical 9.8, exploited in the wild)
- [CVE-2019-5544](https://insights.sbomify.com/CVE-2019-5544/): VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow (critical 9.8, exploited in the wild)
- [CVE-2024-4947](https://insights.sbomify.com/CVE-2024-4947/): Google Chromium V8 Type Confusion (critical 9.6, exploited in the wild)
- [CVE-2024-4671](https://insights.sbomify.com/CVE-2024-4671/): Google Chromium Visuals Use-After-Free (critical 9.6, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-14847 and fix it if it is affected.

What it is: CVE-2019-14847 is a medium-severity vulnerability in Fedoraproject Fedora, published on 6 Nov 2019. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2019-14847 in the wild and no public exploit code.

Affected product: Fedoraproject Fedora. 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-2019-14847/ (Markdown: https://insights.sbomify.com/CVE-2019-14847/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-14847
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-14847
- OSV: https://osv.dev/vulnerability/CVE-2019-14847

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-14847/
Summaries are generated and may contain mistakes; the official description above is the record.