# CVE-2016-5410: Auth bypass in n/a

> Local users can bypass authentication to modify firewall configurations via D-Bus API methods in firewalld.

- **Severity:** Medium 5.5 (`CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 19 Apr 2017
- **Updated:** 6 Aug 2024
- **Also known as:** DEBIAN-CVE-2016-5410, GHSA-v2vf-88f9-4px7, RHSA-2016:2597, UBUNTU-CVE-2016-5410, openSUSE-SU-2024:10205-1

## What is CVE-2016-5410?

CVE-2016-5410 is a medium-severity authentication bypass vulnerability in Redhat Enterprise Linux Desktop, published on 19 Apr 2017. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

firewalld.py in firewalld before 0.4.3.3 allows local users to bypass authentication and modify firewall configurations via the (1) addPassthrough, (2) removePassthrough, (3) addEntry, (4) removeEntry, or (5) setEntries D-Bus API method.

Weakness: CWE-287 (Improper Authentication)

## Which versions are affected by CVE-2016-5410?

It affects 5 products.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `firewall-applet` | Red Hat:enterprise_linux:7::client | All versions | 0:0.4.3.2-8.el7 |
| `firewall-config` | Red Hat:enterprise_linux:7::client | All versions | 0:0.4.3.2-8.el7 |
| `firewalld` | Red Hat:enterprise_linux:7::client | All versions | 0:0.4.3.2-8.el7 |
| `firewalld-filesystem` | Red Hat:enterprise_linux:7::client | All versions | 0:0.4.3.2-8.el7 |
| `python-firewall` | Red Hat:enterprise_linux:7::client | All versions | 0:0.4.3.2-8.el7 |
| `firewall-applet` | Red Hat:enterprise_linux:7::computenode | All versions | 0:0.4.3.2-8.el7 |
| `firewall-config` | Red Hat:enterprise_linux:7::computenode | All versions | 0:0.4.3.2-8.el7 |
| `firewalld` | Red Hat:enterprise_linux:7::computenode | All versions | 0:0.4.3.2-8.el7 |
| `firewalld-filesystem` | Red Hat:enterprise_linux:7::computenode | All versions | 0:0.4.3.2-8.el7 |
| `python-firewall` | Red Hat:enterprise_linux:7::computenode | All versions | 0:0.4.3.2-8.el7 |
| `firewall-applet` | Red Hat:enterprise_linux:7::server | All versions | 0:0.4.3.2-8.el7 |
| `firewall-config` | Red Hat:enterprise_linux:7::server | All versions | 0:0.4.3.2-8.el7 |
| `firewalld` | Red Hat:enterprise_linux:7::server | All versions | 0:0.4.3.2-8.el7 |
| `firewalld-filesystem` | Red Hat:enterprise_linux:7::server | All versions | 0:0.4.3.2-8.el7 |
| `python-firewall` | Red Hat:enterprise_linux:7::server | All versions | 0:0.4.3.2-8.el7 |
| `firewall-applet` | Red Hat:enterprise_linux:7::workstation | All versions | 0:0.4.3.2-8.el7 |
| `firewall-config` | Red Hat:enterprise_linux:7::workstation | All versions | 0:0.4.3.2-8.el7 |
| `firewalld` | Red Hat:enterprise_linux:7::workstation | All versions | 0:0.4.3.2-8.el7 |
| `firewalld-filesystem` | Red Hat:enterprise_linux:7::workstation | All versions | 0:0.4.3.2-8.el7 |
| `python-firewall` | Red Hat:enterprise_linux:7::workstation | All versions | 0:0.4.3.2-8.el7 |
| `firewalld` | openSUSE:Tumbleweed | All versions | 0.4.4.2-1.1 |

Products: Firewalld Firewalld, Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Hpc Node, Redhat Enterprise Linux Server, Redhat Enterprise Linux Workstation.

## How do I fix CVE-2016-5410?

Upgrade to a fixed version.

## Is CVE-2016-5410 being exploited?

There is no known exploitation of CVE-2016-5410 in the wild and no public exploit code.

## Other vulnerabilities in Redhat Enterprise Linux Desktop

- [CVE-2026-4948](https://insights.sbomify.com/CVE-2026-4948/): Firewalld: firewalld: local unprivileged user can modify firewall state due to d-bus setter mis-authorization (medium 5.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2016-5410 and fix it if it is affected.

What it is: CVE-2016-5410 is a medium-severity authentication bypass vulnerability in Redhat Enterprise Linux Desktop, published on 19 Apr 2017. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2016-5410 in the wild and no public exploit code.

Affected product: Redhat Enterprise Linux Desktop. 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-2016-5410/ (Markdown: https://insights.sbomify.com/CVE-2016-5410/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2016-5410
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2016-5410
- OSV: https://osv.dev/vulnerability/CVE-2016-5410

---
From sbomify Insights: https://insights.sbomify.com/CVE-2016-5410/
Summaries are generated and may contain mistakes; the official description above is the record.