# CVE-2018-19638: User can overwrite arbitrary log files in support tar

> An unprivileged user can overwrite arbitrary log files in supportutils if pacemaker is installed, potentially compromising system logs.

- **Severity:** Low 2.2 (`CVSS:3.0/AV:L/AC:H/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:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 5 Mar 2019
- **Updated:** 17 Sep 2024
- **Also known as:** GHSA-8w66-9hvh-6jfx

## What is CVE-2018-19638?

CVE-2018-19638 is a low-severity path traversal vulnerability in SUSE supportutils, published on 5 Mar 2019. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

In supportutils, before version 3.1-5.7.1 and if pacemaker is installed on the system, an unprivileged user could have overwritten arbitrary files in the directory that is used by supportutils to collect the log files.

Weakness: CWE-59 (Improper Link Resolution Before File Access), CWE-377 (DEPRECATED: Insecure Temporary File)

## Which versions are affected by CVE-2018-19638?

It affects 1 product.


Products: Opensuse Supportutils.

## How do I fix CVE-2018-19638?

Upgrade to a fixed version.

## Is CVE-2018-19638 being exploited?

There is no known exploitation of CVE-2018-19638 in the wild and no public exploit code.

## Other vulnerabilities in SUSE supportutils

- [CVE-2018-19636](https://insights.sbomify.com/CVE-2018-19636/): Local root exploit via inclusion of attacker controlled shell script (high 7.3)
- [CVE-2018-19639](https://insights.sbomify.com/CVE-2018-19639/): Code execution if run with command line switch -v (medium 6.7)
- [CVE-2022-45154](https://insights.sbomify.com/CVE-2022-45154/): supportconfig does not remove passwords in /etc/iscsi/iscsid.conf and /etc/target/lio_setup.sh (medium 4.4)
- [CVE-2018-19640](https://insights.sbomify.com/CVE-2018-19640/): Code execution if run with command line switch -v (medium 4.4)
- [CVE-2018-19637](https://insights.sbomify.com/CVE-2018-19637/): Static temporary filename allows overwriting of files (low 2.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-19638 and fix it if it is affected.

What it is: CVE-2018-19638 is a low-severity path traversal vulnerability in SUSE supportutils, published on 5 Mar 2019. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2018-19638 in the wild and no public exploit code.

Affected product: SUSE supportutils. 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-2018-19638/ (Markdown: https://insights.sbomify.com/CVE-2018-19638/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-19638
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-19638
- OSV: https://osv.dev/vulnerability/CVE-2018-19638

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-19638/
Summaries are generated and may contain mistakes; the official description above is the record.