# CVE-2009-4112: Command injection in n/a

> Authenticated administrators can execute arbitrary commands by modifying Data Input Method settings, leading to privilege escalation.

- **Severity:** Critical 9.0 (`AV:N/AC:L/Au:S/C:C/I:C/A:C`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 30 Nov 2009
- **Updated:** 7 Aug 2024
- **Also known as:** DEBIAN-CVE-2009-4112, GHSA-p256-rcj4-whc9

## What is CVE-2009-4112?

CVE-2009-4112 is a critical command injection vulnerability in Cacti Cacti, published on 30 Nov 2009. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

Cacti 0.8.7e and earlier allows remote authenticated administrators to gain privileges by modifying the "Data Input Method" for the "Linux - Get Memory Usage" setting to contain arbitrary commands.

Weakness: CWE-264

## Which versions are affected by CVE-2009-4112?

It affects 1 product.


Products: Cacti Cacti.

## How do I fix CVE-2009-4112?

Upgrade to a fixed version.

## Is CVE-2009-4112 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2009-4112 exists.

Public exploit code:

- Joomla! Component ProofReader 1.0 RC9 - Cross-Site Scripting (exploitdb)

## Other vulnerabilities in Cacti Cacti

- [CVE-2022-46169](https://insights.sbomify.com/CVE-2022-46169/): Cacti Command Injection (critical 9.8, exploited in the wild)
- [CVE-2026-39893](https://insights.sbomify.com/CVE-2026-39893/): Cacti: Pre-authentication SQL injection via rfilter RLIKE clause in graph_view.php (critical 9.8)
- [CVE-2026-39938](https://insights.sbomify.com/CVE-2026-39938/): Cacti: Unauthenticated RCE on Graph Image (critical 9.8)
- [CVE-2026-39955](https://insights.sbomify.com/CVE-2026-39955/): Cacti has Pre-Authentication SQL Injection via unanchored FILTER_VALIDATE_REGEXP in graph_view.php (critical 9.8)
- [CVE-2023-39361](https://insights.sbomify.com/CVE-2023-39361/): Unauthenticated SQL Injection in graph_view.php in Cacti (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2009-4112 and fix it if it is affected.

What it is: CVE-2009-4112 is a critical command injection vulnerability in Cacti Cacti, published on 30 Nov 2009. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2009-4112 exists.

Affected product: Cacti Cacti. 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-2009-4112/ (Markdown: https://insights.sbomify.com/CVE-2009-4112/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2009-4112
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2009-4112
- OSV: https://osv.dev/vulnerability/CVE-2009-4112

---
From sbomify Insights: https://insights.sbomify.com/CVE-2009-4112/
Summaries are generated and may contain mistakes; the official description above is the record.