# CVE-2023-48298: Integer underflow leading to stack overflow in FPC codec decompression

> An unauthenticated attacker can cause a denial of service via stack buffer overflow triggered by integer underflow in FPC codec decompression.

- **Severity:** Medium 5.9 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 21 Dec 2023
- **Updated:** 27 Nov 2024
- **Also known as:** GHSA-qw9f-qv29-8938, UBUNTU-CVE-2023-48298

## What is CVE-2023-48298?

CVE-2023-48298 is a medium-severity vulnerability in ClickHouse, published on 21 Dec 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

ClickHouse® is an open-source column-oriented database management system that allows generating analytical data reports in real-time. This vulnerability is an integer underflow resulting in crash due to stack buffer overflow in decompression of FPC codec. It can be triggered and exploited by an unauthenticated attacker. The vulnerability is very similar to CVE-2023-47118 with how the vulnerable function can be exploited.

Weakness: CWE-191 (Integer Underflow (Wrap or Wraparound))

## Which versions are affected by CVE-2023-48298?

It affects 2 products.


Products: Clickhouse Clickhouse, Clickhouse Clickhouse Cloud.

## How do I fix CVE-2023-48298?

No fix has been published for CVE-2023-48298 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-48298 being exploited?

There is no known exploitation of CVE-2023-48298 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-2023-48298 and fix it if it is affected.

What it is: CVE-2023-48298 is a medium-severity vulnerability in ClickHouse, published on 21 Dec 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-48298 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-2023-48298/ (Markdown: https://insights.sbomify.com/CVE-2023-48298/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-48298
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-48298
- OSV: https://osv.dev/vulnerability/CVE-2023-48298

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-48298/
Summaries are generated and may contain mistakes; the official description above is the record.