# CVE-2018-2773: Denial of service in MySQL Server

> A high-privileged local attacker can cause a complete denial of service in MySQL Server by triggering a crash or hang.

- **Severity:** Medium 4.1 (`CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 19 Apr 2018
- **Updated:** 3 Oct 2024
- **Also known as:** GHSA-j997-q495-mhm6, UBUNTU-CVE-2018-2773

## What is CVE-2018-2773?

CVE-2018-2773 is a medium-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 19 Apr 2018. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Vulnerability in the MySQL Server component of Oracle MySQL (subcomponent: Client programs). Supported versions that are affected are 5.5.59 and prior, 5.6.39 and prior and 5.7.21 and prior. Difficult to exploit vulnerability allows high privileged attacker with logon to the infrastructure where MySQL Server executes 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 4.1 (Availability impacts). CVSS Vector: (CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H).

## Which versions are affected by CVE-2018-2773?

It affects 3 products.


Products: Canonical Ubuntu Linux, Debian Debian Linux, Oracle Mysql.

## How do I fix CVE-2018-2773?

Apply the vendor's patch.

## Is CVE-2018-2773 being exploited?

There is no known exploitation of CVE-2018-2773 in the wild and no public exploit code.

## Other vulnerabilities in Canonical Ubuntu Linux

- [CVE-2020-11651](https://insights.sbomify.com/CVE-2020-11651/): SaltStack Salt Authentication Bypass (critical 9.8, exploited in the wild)
- [CVE-2020-7247](https://insights.sbomify.com/CVE-2020-7247/): OpenSMTPD Remote Code Execution (critical 9.8, exploited in the wild)
- [CVE-2019-16928](https://insights.sbomify.com/CVE-2019-16928/): Exim Out-of-bounds Write (critical 9.8, exploited in the wild)
- [CVE-2018-6789](https://insights.sbomify.com/CVE-2018-6789/): Exim Buffer Overflow (critical 9.8, exploited in the wild)
- [CVE-2015-2590](https://insights.sbomify.com/CVE-2015-2590/): Oracle Java SE and Java SE Embedded Remote Code Execution (critical 9.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-2773 and fix it if it is affected.

What it is: CVE-2018-2773 is a medium-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 19 Apr 2018. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2018-2773 in the wild and no public exploit code.

Affected product: Canonical Ubuntu Linux. 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-2018-2773/ (Markdown: https://insights.sbomify.com/CVE-2018-2773/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-2773
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-2773
- OSV: https://osv.dev/vulnerability/CVE-2018-2773

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-2773/
Summaries are generated and may contain mistakes; the official description above is the record.