# CVE-2016-9565: Path traversal in n/a

> Remote attackers can read or write arbitrary files in Nagios Core by spoofing RSS feed responses due to insufficient path validation.

- **Severity:** Critical 9.8 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 15 Dec 2016
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-828p-3vwg-wc22

## What is CVE-2016-9565?

CVE-2016-9565 is a critical path traversal vulnerability in n/a, published on 15 Dec 2016. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

MagpieRSS, as used in the front-end component in Nagios Core before 4.2.2 might allow remote attackers to read or write to arbitrary files by spoofing a crafted response from the Nagios RSS feed server.  NOTE: this vulnerability exists because of an incomplete fix for CVE-2008-4796.

Weakness: CWE-284 (Improper Access Control)

## Which versions are affected by CVE-2016-9565?

It affects 1 product.


Products: Nagios Nagios.

## How do I fix CVE-2016-9565?

Upgrade to a fixed version.

## Is CVE-2016-9565 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2016-9565 exists.

Public exploit code:

- Nagios < 4.2.2 - Arbitrary Code Execution (exploitdb)

## Other vulnerabilities in n/a

- [CVE-2002-1959](https://insights.sbomify.com/CVE-2002-1959/): Command injection in n/a (critical 10.0)
- [CVE-2016-0726](https://insights.sbomify.com/CVE-2016-0726/): Hardcoded credentials in n/a (critical 9.8)
- [CVE-2008-7313](https://insights.sbomify.com/CVE-2008-7313/): Command injection in n/a (critical 9.8)
- [CVE-2014-5009](https://insights.sbomify.com/CVE-2014-5009/): Command injection in n/a (critical 9.8)
- [CVE-2020-6585](https://insights.sbomify.com/CVE-2020-6585/): Nagios Log Server 2.1.3 has CSRF. (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2016-9565 and fix it if it is affected.

What it is: CVE-2016-9565 is a critical path traversal vulnerability in n/a, published on 15 Dec 2016. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2016-9565 exists.

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-2016-9565/ (Markdown: https://insights.sbomify.com/CVE-2016-9565/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2016-9565
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2016-9565
- OSV: https://osv.dev/vulnerability/CVE-2016-9565

---
From sbomify Insights: https://insights.sbomify.com/CVE-2016-9565/
Summaries are generated and may contain mistakes; the official description above is the record.