# CVE-2004-1031: Privilege escalation in n/a

> Local attackers can escalate privileges by exploiting a flaw in Fcron's SUID process handling to load arbitrary root-owned configuration files.

- **Severity:** High 7.2 (`AV:L/AC:L/Au:N/C:C/I:C/A:C`)
- **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:** 24 Nov 2004
- **Updated:** 8 Aug 2024
- **Also known as:** GHSA-rq5v-5f8w-q4j4

## What is CVE-2004-1031?

CVE-2004-1031 is a high-severity vulnerability in Gentoo Linux, published on 24 Nov 2004. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

fcronsighup in Fcron 2.0.1, 2.9.4, and possibly earlier versions allows local users to bypass access restrictions and load an arbitrary configuration file by starting an suid process and pointing the fcronsighup configuration file to a /proc entry that is owned by root but modifiable by the user, such as /proc/self/cmdline or /proc/self/environ.

## Which versions are affected by CVE-2004-1031?

It affects 2 products.


Products: Gentoo Linux, Thibault Godouet Fcron.

## How do I fix CVE-2004-1031?

No fix has been published for CVE-2004-1031 yet. Limit exposure of the affected software until one is available.

## Is CVE-2004-1031 being exploited?

There is no known exploitation of CVE-2004-1031 in the wild and no public exploit code.

## Other vulnerabilities in Gentoo Linux

- [CVE-2004-0914](https://insights.sbomify.com/CVE-2004-0914/): Memory corruption in n/a (critical 10.0)
- [CVE-2004-1037](https://insights.sbomify.com/CVE-2004-1037/): Command injection in n/a (critical 10.0)
- [CVE-2004-1034](https://insights.sbomify.com/CVE-2004-1034/): Memory corruption in n/a (critical 10.0)
- [CVE-2004-0891](https://insights.sbomify.com/CVE-2004-0891/): Memory corruption in n/a (critical 10.0)
- [CVE-2002-1337](https://insights.sbomify.com/CVE-2002-1337/): Memory corruption in n/a (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2004-1031 and fix it if it is affected.

What it is: CVE-2004-1031 is a high-severity vulnerability in Gentoo Linux, published on 24 Nov 2004. 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-2004-1031 in the wild and no public exploit code.

Affected product: Gentoo Linux. 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-2004-1031/ (Markdown: https://insights.sbomify.com/CVE-2004-1031/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2004-1031
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2004-1031
- OSV: https://osv.dev/vulnerability/CVE-2004-1031

---
From sbomify Insights: https://insights.sbomify.com/CVE-2004-1031/
Summaries are generated and may contain mistakes; the official description above is the record.