# CVE-2018-2703: Denial of service in MySQL Server

> A low-privileged attacker can cause a complete denial of service in MySQL Server via network access.

- **Severity:** Medium 6.5 (`CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 18 Jan 2018
- **Updated:** 3 Oct 2024
- **Also known as:** GHSA-p6q6-vwfm-5fm9, UBUNTU-CVE-2018-2703

## What is CVE-2018-2703?

CVE-2018-2703 is a medium-severity denial of service vulnerability in Oracle Mysql, published on 18 Jan 2018. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Vulnerability in the MySQL Server component of Oracle MySQL (subcomponent: Server : Security : Privileges). Supported versions that are affected are 5.6.38 and prior and 5.7.20 and prior. Easily exploitable vulnerability allows low privileged attacker with network access via multiple protocols to compromise MySQL Server. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server. CVSS 3.0 Base Score 6.5 (Availability impacts). CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).

## Which versions are affected by CVE-2018-2703?

It affects 1 product.


Products: Oracle Mysql.

## How do I fix CVE-2018-2703?

Apply the vendor's patch.

## Is CVE-2018-2703 being exploited?

There is no known exploitation of CVE-2018-2703 in the wild and no public exploit code.

## Other vulnerabilities in Oracle Mysql

- [CVE-2016-0639](https://insights.sbomify.com/CVE-2016-0639/): Auth bypass in n/a (critical 9.8)
- [CVE-2003-0150](https://insights.sbomify.com/CVE-2003-0150/): Privilege escalation in n/a (critical 9.0)
- [CVE-2005-2572](https://insights.sbomify.com/CVE-2005-2572/): Denial of service in n/a (high 8.5)
- [CVE-2020-14878](https://insights.sbomify.com/CVE-2020-14878/): Auth bypass in MySQL Server (high 8.0)
- [CVE-2002-0969](https://insights.sbomify.com/CVE-2002-0969/): Memory corruption in n/a (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-2703 and fix it if it is affected.

What it is: CVE-2018-2703 is a medium-severity denial of service vulnerability in Oracle Mysql, published on 18 Jan 2018. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2018-2703 in the wild and no public exploit code.

Affected product: Oracle Mysql. 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-2018-2703/ (Markdown: https://insights.sbomify.com/CVE-2018-2703/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-2703
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-2703
- OSV: https://osv.dev/vulnerability/CVE-2018-2703

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-2703/
Summaries are generated and may contain mistakes; the official description above is the record.