# CVE-2018-12477: obs-service-refresh_patches can be tricked into deleting '..' or other unrelated directories

> Remote attackers can trick the Open Build Service into deleting arbitrary directories, including parent directories, via improper CRLF sequence handling.

- **Severity:** Low 3.5 (`CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/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:** Yes
- **Published:** 9 Oct 2018
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-vp32-rg8f-2jxg, openSUSE-SU-2024:11105-1

## What is CVE-2018-12477?

CVE-2018-12477 is a low-severity path traversal vulnerability in Opensuse Leap, 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 Neutralization of CRLF Sequences vulnerability in Open Build Service allows remote attackers to cause deletion of directories by tricking obs-service-refresh_patches to delete them. Affected releases are openSUSE Open Build Service: versions prior to d6244245dda5367767efc989446fe4b5e4609cce.

Weakness: CWE-93 (Improper Neutralization of CRLF Sequences)

## Which versions are affected by CVE-2018-12477?

It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `obs-service-refresh_patches` | openSUSE:Tumbleweed | All versions | 0.3.9+git.1625238904.d59f20e-1.2 |

Products: Opensuse Leap.

## How do I fix CVE-2018-12477?

Apply the vendor's patch.

## Is CVE-2018-12477 being exploited?

There is no known exploitation of CVE-2018-12477 in the wild and no public exploit code.

## Other vulnerabilities in Opensuse Leap

- [CVE-2015-4902](https://insights.sbomify.com/CVE-2015-4902/): Oracle Java SE Integrity Check (medium 5.3, exploited in the wild)
- [CVE-2017-14804](https://insights.sbomify.com/CVE-2017-14804/): package builds could use directory traversal to write outside of target area (critical 9.9)
- [CVE-2019-20787](https://insights.sbomify.com/CVE-2019-20787/): Teeworlds before 0.7.4 has an integer overflow when computing a tilemap size. (critical 9.8)
- [CVE-2019-8341](https://insights.sbomify.com/CVE-2019-8341/): Code injection in n/a (critical 9.8)
- [CVE-2019-6438](https://insights.sbomify.com/CVE-2019-6438/): Other in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-12477 and fix it if it is affected.

What it is: CVE-2018-12477 is a low-severity path traversal vulnerability in Opensuse Leap, 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-2018-12477 in the wild and no public exploit code.

Affected product: Opensuse Leap. 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-2018-12477/ (Markdown: https://insights.sbomify.com/CVE-2018-12477/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-12477
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-12477
- OSV: https://osv.dev/vulnerability/CVE-2018-12477

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-12477/
Summaries are generated and may contain mistakes; the official description above is the record.