# CVE-2020-25722: Missing authorization in samba

> Attackers can exploit flawed access checks in Samba AD DC to achieve total domain compromise, requiring immediate patching by administrators.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **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:** 18 Feb 2022
- **Updated:** 4 Aug 2024
- **Also known as:** ALPINE-CVE-2020-25722, AZL-36996, AZL-8651, DEBIAN-CVE-2020-25722, ECHO-1d75-7a80-f32f, GHSA-5hcc-fcfj-mj9h, UBUNTU-CVE-2020-25722

## What is CVE-2020-25722?

CVE-2020-25722 is a high-severity missing authorization vulnerability in Canonical Ubuntu Linux, published on 18 Feb 2022. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Multiple flaws were found in the way samba AD DC implemented access and conformance checking of stored data. An attacker could use this flaw to cause total domain compromise.

Weakness: CWE-863 (Incorrect Authorization)

## Which versions are affected by CVE-2020-25722?

It affects 4 products.


Products: Canonical Ubuntu Linux, Debian Debian Linux, Fedoraproject Fedora, Samba Samba.

## How do I fix CVE-2020-25722?

Apply the vendor's patch.

## Is CVE-2020-25722 being exploited?

There is no known exploitation of CVE-2020-25722 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-2020-25722 and fix it if it is affected.

What it is: CVE-2020-25722 is a high-severity missing authorization vulnerability in Canonical Ubuntu Linux, published on 18 Feb 2022. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-25722 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-2020-25722/ (Markdown: https://insights.sbomify.com/CVE-2020-25722/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-25722
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-25722
- OSV: https://osv.dev/vulnerability/CVE-2020-25722

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-25722/
Summaries are generated and may contain mistakes; the official description above is the record.