# CVE-2023-3099: KylinSoft youker-assistant Arbitrary File dbus.SystemBus delete_file access control

> Local attackers can bypass access controls to delete arbitrary files via the youker-assistant delete_file function in KylinOS.

- **Severity:** Medium 4.4 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L`)
- **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:** 5 Jun 2023
- **Updated:** 2 Aug 2024
- **Also known as:** GHSA-7vvx-qrjq-rx5x

## What is CVE-2023-3099?

CVE-2023-3099 is a medium-severity missing authorization vulnerability in KylinSoft youker-assistant, published on 5 Jun 2023. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A vulnerability classified as critical was found in KylinSoft youker-assistant on KylinOS. Affected by this vulnerability is the function delete_file in the library dbus.SystemBus of the component Arbitrary File Handler. The manipulation leads to improper access controls. It is possible to launch the attack on the local host. The exploit has been disclosed to the public and may be used. Upgrading to version 3.0.2-0kylin6k70-23 is able to address this issue. It is recommended to upgrade the affected component. The identifier VDB-230689 was assigned to this vulnerability. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.

Weakness: CWE-284 (Improper Access Control)

## Which versions are affected by CVE-2023-3099?

It affects 1 product.


Products: Ubuntukylin Youker-Assistant.

## How do I fix CVE-2023-3099?

No fix has been published for CVE-2023-3099 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-3099 being exploited?

There is no known exploitation of CVE-2023-3099 in the wild and no public exploit code.

## Other vulnerabilities in KylinSoft youker-assistant

- [CVE-2023-3098](https://insights.sbomify.com/CVE-2023-3098/): KylinSoft youker-assistant restore_all_sound_file path traversal (medium 4.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-3099 and fix it if it is affected.

What it is: CVE-2023-3099 is a medium-severity missing authorization vulnerability in KylinSoft youker-assistant, published on 5 Jun 2023. 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-2023-3099 in the wild and no public exploit code.

Affected product: KylinSoft youker-assistant. 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-2023-3099/ (Markdown: https://insights.sbomify.com/CVE-2023-3099/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-3099
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-3099
- OSV: https://osv.dev/vulnerability/CVE-2023-3099

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-3099/
Summaries are generated and may contain mistakes; the official description above is the record.