# ALBA-2022:0356: freeradius:3.0 bug fix update

> A null pointer dereference in FreeRADIUS causes a segmentation fault, leading to denial of service for network authentication services.

- **Severity:** Not scored
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 1 Feb 2022

## What is ALBA-2022:0356?

ALBA-2022:0356 is a vulnerability in freeradius, published on 1 Feb 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

FreeRADIUS is a high-performance and highly configurable free Remote Authentication Dial In User Service (RADIUS) server, designed to allow centralized authentication and authorization for a network.

Bug Fix:

* radiusd segfault with null home_server in process_proxy_reply (BZ#2031168)

## Which versions are affected by ALBA-2022:0356?


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `freeradius` | AlmaLinux:8 | All versions | 3.0.20-11.module_el8.5.0+2619+a9514344 |
| `freeradius-devel` | AlmaLinux:8 | All versions | 3.0.20-11.module_el8.5.0+2619+a9514344 |
| `freeradius-doc` | AlmaLinux:8 | All versions | 3.0.20-11.module_el8.5.0+2619+a9514344 |
| `freeradius-krb5` | AlmaLinux:8 | All versions | 3.0.20-11.module_el8.5.0+2619+a9514344 |
| `freeradius-ldap` | AlmaLinux:8 | All versions | 3.0.20-11.module_el8.5.0+2619+a9514344 |
| `freeradius-mysql` | AlmaLinux:8 | All versions | 3.0.20-11.module_el8.5.0+2619+a9514344 |
| `freeradius-perl` | AlmaLinux:8 | All versions | 3.0.20-11.module_el8.5.0+2619+a9514344 |
| `freeradius-postgresql` | AlmaLinux:8 | All versions | 3.0.20-11.module_el8.5.0+2619+a9514344 |
| `freeradius-rest` | AlmaLinux:8 | All versions | 3.0.20-11.module_el8.5.0+2619+a9514344 |
| `freeradius-sqlite` | AlmaLinux:8 | All versions | 3.0.20-11.module_el8.5.0+2619+a9514344 |
| `freeradius-unixODBC` | AlmaLinux:8 | All versions | 3.0.20-11.module_el8.5.0+2619+a9514344 |
| `freeradius-utils` | AlmaLinux:8 | All versions | 3.0.20-11.module_el8.5.0+2619+a9514344 |
| `python3-freeradius` | AlmaLinux:8 | All versions | 3.0.20-11.module_el8.5.0+2619+a9514344 |

## How do I fix ALBA-2022:0356?

Apply the vendor's patch.

## Is ALBA-2022:0356 being exploited?

There is no known exploitation of ALBA-2022:0356 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for ALBA-2022:0356 and fix it if it is affected.

What it is: ALBA-2022:0356 is a vulnerability in freeradius, published on 1 Feb 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of ALBA-2022:0356 in the wild and no public exploit code.

Affected product: freeradius. 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/ALBA-2022-0356/ (Markdown: https://insights.sbomify.com/ALBA-2022-0356/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/ALBA-2022:0356

---
From sbomify Insights: https://insights.sbomify.com/ALBA-2022-0356/
Summaries are generated and may contain mistakes; the official description above is the record.