# CVE-2017-18226: Privilege escalation in n/a

> Local attackers can escalate privileges or cause denial of service by modifying PID files in a world-writable directory before root scripts execute kill commands.

- **Severity:** Medium 5.5 (`CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H`)
- **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:** No
- **Published:** 12 Mar 2018
- **Updated:** 5 Aug 2024
- **Also known as:** DEBIAN-CVE-2017-18226, GHSA-6mhg-qh56-v8jg

## What is CVE-2017-18226?

CVE-2017-18226 is a medium-severity vulnerability in n/a, published on 12 Mar 2018. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

The Gentoo net-im/jabberd2 package through 2.6.1 sets the ownership of /var/run/jabber to the jabber account, which might allow local users to kill arbitrary processes by leveraging access to this account for PID file modification before a root script executes a "kill -TERM `cat /var/run/jabber/filename.pid`" command.

Weakness: CWE-732 (Incorrect Permission Assignment for Critical Resource)

## Which versions are affected by CVE-2017-18226?

It affects 1 product.


Products: Jabberd2 Jabberd2.

## How do I fix CVE-2017-18226?

No fix has been published for CVE-2017-18226 yet. Limit exposure of the affected software until one is available.

## Is CVE-2017-18226 being exploited?

There is no known exploitation of CVE-2017-18226 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2017-10807](https://insights.sbomify.com/CVE-2017-10807/): Auth bypass in n/a (critical 9.8)
- [CVE-2017-18225](https://insights.sbomify.com/CVE-2017-18225/): Privilege escalation in n/a (high 7.8)
- [CVE-2015-2058](https://insights.sbomify.com/CVE-2015-2058/): Information disclosure in n/a (medium 6.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-18226 and fix it if it is affected.

What it is: CVE-2017-18226 is a medium-severity vulnerability in n/a, published on 12 Mar 2018. 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-2017-18226 in the wild and no public exploit code.

Affected product: n/a. 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-2017-18226/ (Markdown: https://insights.sbomify.com/CVE-2017-18226/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-18226
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-18226
- OSV: https://osv.dev/vulnerability/CVE-2017-18226

---
From sbomify Insights: https://insights.sbomify.com/CVE-2017-18226/
Summaries are generated and may contain mistakes; the official description above is the record.