# CVE-2022-2031: Auth bypass in samba

> A flaw in Samba allows users to obtain and use tickets for other services by exploiting shared keys between KDC and kpasswd, leading to unauthorized access.

- **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:** 25 Aug 2022
- **Updated:** 3 Aug 2024
- **Also known as:** ALPINE-CVE-2022-2031, AZL-10735, AZL-37011, DEBIAN-CVE-2022-2031, ECHO-10a7-d9e3-de7d, GHSA-rprh-2gf9-vfmv, UBUNTU-CVE-2022-2031

## What is CVE-2022-2031?

CVE-2022-2031 is a high-severity authentication bypass vulnerability in Samba Samba, published on 25 Aug 2022. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A flaw was found in Samba. The security vulnerability occurs when KDC and the kpasswd service share a single account and set of keys, allowing them to decrypt each other's tickets. A user who has been requested to change their password, can exploit this flaw to obtain and use tickets to other services.

Weakness: CWE-287 (Improper Authentication), CWE-288 (Authentication Bypass Using an Alternate Path or Channel)

## Which versions are affected by CVE-2022-2031?

It affects 1 product.


Products: Samba Samba.

## How do I fix CVE-2022-2031?

Apply the vendor's patch.

## Is CVE-2022-2031 being exploited?

There is no known exploitation of CVE-2022-2031 in the wild and no public exploit code.

## Other vulnerabilities in Samba Samba

- [CVE-2012-1182](https://insights.sbomify.com/CVE-2012-1182/): Integer overflow in n/a (critical 10.0)
- [CVE-2007-2446](https://insights.sbomify.com/CVE-2007-2446/): Memory corruption in n/a (critical 10.0)
- [CVE-2004-0600](https://insights.sbomify.com/CVE-2004-0600/): Memory corruption in n/a (critical 10.0)
- [CVE-1999-0810](https://insights.sbomify.com/CVE-1999-0810/): Denial of service in n/a (critical 10.0)
- [CVE-1999-0182](https://insights.sbomify.com/CVE-1999-0182/): Memory corruption in n/a (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-2031 and fix it if it is affected.

What it is: CVE-2022-2031 is a high-severity authentication bypass vulnerability in Samba Samba, published on 25 Aug 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-2022-2031 in the wild and no public exploit code.

Affected product: Samba Samba. 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-2022-2031/ (Markdown: https://insights.sbomify.com/CVE-2022-2031/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-2031
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-2031
- OSV: https://osv.dev/vulnerability/CVE-2022-2031

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-2031/
Summaries are generated and may contain mistakes; the official description above is the record.