# CVE-2009-4411: Path traversal in n/a

> Local attackers can modify ACLs of arbitrary files via symlink attacks in XFS acl tools, potentially leading to privilege escalation.

- **Severity:** Low 3.7 (`AV:L/AC:H/Au:N/C:P/I:P/A:P`)
- **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:** 24 Dec 2009
- **Updated:** 7 Aug 2024
- **Also known as:** DEBIAN-CVE-2009-4411, GHSA-v9h8-c2x4-crx9

## What is CVE-2009-4411?

CVE-2009-4411 is a low-severity path traversal vulnerability in n/a, published on 24 Dec 2009. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

The (1) setfacl and (2) getfacl commands in XFS acl 2.2.47, when running in recursive (-R) mode, follow symbolic links even when the --physical (aka -P) or -L option is specified, which might allow local users to modify the ACL for arbitrary files or directories via a symlink attack.

Weakness: CWE-264

## Which versions are affected by CVE-2009-4411?

It affects 1 product.


Products: Xfs Acl.

## How do I fix CVE-2009-4411?

Apply the vendor's patch.

## Is CVE-2009-4411 being exploited?

There is no known exploitation of CVE-2009-4411 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2009-4411 and fix it if it is affected.

What it is: CVE-2009-4411 is a low-severity path traversal vulnerability in n/a, published on 24 Dec 2009. 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-2009-4411 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-2009-4411/ (Markdown: https://insights.sbomify.com/CVE-2009-4411/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2009-4411
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2009-4411
- OSV: https://osv.dev/vulnerability/CVE-2009-4411

---
From sbomify Insights: https://insights.sbomify.com/CVE-2009-4411/
Summaries are generated and may contain mistakes; the official description above is the record.