# CVE-2007-4993: Command injection in n/a

> Local attackers with guest privileges can execute arbitrary commands in the host domain via a crafted grub configuration file.

- **Severity:** Medium 6.9 (`AV:L/AC:M/Au:N/C:C/I:C/A:C`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 27 Sep 2007
- **Updated:** 7 Aug 2024
- **Also known as:** GHSA-43w7-6v4p-jxc3

## What is CVE-2007-4993?

CVE-2007-4993 is a medium-severity command injection vulnerability in n/a, published on 27 Sep 2007. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

pygrub (tools/pygrub/src/GrubConf.py) in Xen 3.0.3, when booting a guest domain, allows local users with elevated privileges in the guest domain to execute arbitrary commands in domain 0 via a crafted grub.conf file whose contents are used in exec statements.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2007-4993?

It affects 1 product.


Products: Xensource Inc Xen.

## How do I fix CVE-2007-4993?

Apply the vendor's patch.

## Is CVE-2007-4993 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2007-4993 exists.

Public exploit code:

- Xen 3.0.3 - pygrub TOOLS/PYGRUB/SRC/GRUBCONF.PY Local Command Injection (exploitdb)

## Other vulnerabilities in n/a

- [CVE-2007-3919](https://insights.sbomify.com/CVE-2007-3919/): Path traversal in n/a (medium 6.0)
- [CVE-2007-5906](https://insights.sbomify.com/CVE-2007-5906/): Denial of service in n/a (medium 4.7)
- [CVE-2007-5907](https://insights.sbomify.com/CVE-2007-5907/): Privilege escalation in n/a (medium 4.7)
- [CVE-2008-1619](https://insights.sbomify.com/CVE-2008-1619/): The ssm_i emulation in Xen 5.1 on IA64 architectures allows attackers to cause a denial of service (dom0 panic) via certain traffic, as demo (medium 4.3)
- [CVE-2007-6207](https://insights.sbomify.com/CVE-2007-6207/): Information disclosure in n/a (low 2.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2007-4993 and fix it if it is affected.

What it is: CVE-2007-4993 is a medium-severity command injection vulnerability in n/a, published on 27 Sep 2007. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2007-4993 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-2007-4993/ (Markdown: https://insights.sbomify.com/CVE-2007-4993/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2007-4993
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2007-4993
- OSV: https://osv.dev/vulnerability/CVE-2007-4993

---
From sbomify Insights: https://insights.sbomify.com/CVE-2007-4993/
Summaries are generated and may contain mistakes; the official description above is the record.