# CVE-2018-12478: obs-service-replace_using_package_version allows to specify arbitrary input files

> Remote attackers can extract arbitrary files from the system by exploiting improper input validation in the Open Build Service.

- **Severity:** Medium 4.8 (`CVSS:3.0/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 9 Oct 2018
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-5h3v-27vw-f738

## What is CVE-2018-12478?

CVE-2018-12478 is a medium-severity path traversal vulnerability in openSUSE Open Build Service, published on 9 Oct 2018. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

A Improper Input Validation vulnerability in Open Build Service allows remote attackers to extract files from the system where the service runs. Affected releases are openSUSE Open Build Service: status of is unknown.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2018-12478?

It affects 1 product.


Products: Opensuse Open Build Service.

## How do I fix CVE-2018-12478?

No fix has been published for CVE-2018-12478 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-12478 being exploited?

There is no known exploitation of CVE-2018-12478 in the wild and no public exploit code.

## Other vulnerabilities in openSUSE Open Build Service

- [CVE-2022-21949](https://insights.sbomify.com/CVE-2022-21949/): Multiple XXE vulnerabilities in OBS (high 8.8)
- [CVE-2013-3703](https://insights.sbomify.com/CVE-2013-3703/): No write permission check in change_role command (high 8.8)
- [CVE-2014-0594](https://insights.sbomify.com/CVE-2014-0594/): CSRF protection incorrectly disabled (high 8.8)
- [CVE-2021-36777](https://insights.sbomify.com/CVE-2021-36777/): login-proxy sends password to attacker-provided domain (high 8.1)
- [CVE-2011-3178](https://insights.sbomify.com/CVE-2011-3178/): openbuildservice webui code injection (high 8.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-12478 and fix it if it is affected.

What it is: CVE-2018-12478 is a medium-severity path traversal vulnerability in openSUSE Open Build Service, published on 9 Oct 2018. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2018-12478 in the wild and no public exploit code.

Affected product: openSUSE Open Build Service. 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-2018-12478/ (Markdown: https://insights.sbomify.com/CVE-2018-12478/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-12478
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-12478
- OSV: https://osv.dev/vulnerability/CVE-2018-12478

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From sbomify Insights: https://insights.sbomify.com/CVE-2018-12478/
Summaries are generated and may contain mistakes; the official description above is the record.