# CVE-2019-15024: Path traversal in ClickHouse

> An attacker with ZooKeeper write access can force ClickHouse replicas to write files to arbitrary filesystem paths, potentially leading to code execution.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 30 Dec 2019
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-vv4f-6f99-x599

## What is CVE-2019-15024?

CVE-2019-15024 is a medium-severity path traversal vulnerability in ClickHouse, published on 30 Dec 2019. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

In all versions of ClickHouse before 19.14.3, an attacker having write access to ZooKeeper and who is able to run a custom server available from the network where ClickHouse runs, can create a custom-built malicious server that will act as a ClickHouse replica and register it in ZooKeeper. When another replica will fetch data part from the malicious replica, it can force clickhouse-server to write to arbitrary path on filesystem.

## Which versions are affected by CVE-2019-15024?

It affects 1 product.


Products: Clickhouse Clickhouse.

## How do I fix CVE-2019-15024?

No fix has been published for CVE-2019-15024 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-15024 being exploited?

There is no known exploitation of CVE-2019-15024 in the wild and no public exploit code.

## Other vulnerabilities in ClickHouse

- [CVE-2019-16535](https://insights.sbomify.com/CVE-2019-16535/): Memory corruption in ClickHouse (critical 9.8)
- [CVE-2018-14670](https://insights.sbomify.com/CVE-2018-14670/): Missing authorization in ClickHouse (critical 9.8)
- [CVE-2018-14671](https://insights.sbomify.com/CVE-2018-14671/): Code injection in ClickHouse (critical 9.8)
- [CVE-2021-43304](https://insights.sbomify.com/CVE-2021-43304/): Memory corruption in clickhouse (high 8.8)
- [CVE-2021-43305](https://insights.sbomify.com/CVE-2021-43305/): Memory corruption in clickhouse (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-15024 and fix it if it is affected.

What it is: CVE-2019-15024 is a medium-severity path traversal vulnerability in ClickHouse, published on 30 Dec 2019. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2019-15024 in the wild and no public exploit code.

Affected product: ClickHouse. 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-2019-15024/ (Markdown: https://insights.sbomify.com/CVE-2019-15024/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-15024
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-15024
- OSV: https://osv.dev/vulnerability/CVE-2019-15024

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-15024/
Summaries are generated and may contain mistakes; the official description above is the record.