# CVE-2023-21918: Denial of service in Database - Enterprise Edition

> A high-privileged local attacker can cause a complete denial of service in Oracle Database Recovery Manager via network access.

- **Severity:** Medium 6.8 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 18 Apr 2023
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-23qh-6x5w-x4r7

## What is CVE-2023-21918?

CVE-2023-21918 is a medium-severity denial of service vulnerability in Oracle Corporation Database - Enterprise Edition, published on 18 Apr 2023. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

Vulnerability in the Oracle Database Recovery Manager component of Oracle Database Server.  Supported versions that are affected are 19c and  21c. Easily exploitable vulnerability allows high privileged attacker having Local SYSDBA privilege with network access via Oracle Net to compromise Oracle Database Recovery Manager.  While the vulnerability is in Oracle Database Recovery Manager, attacks may significantly impact additional products (scope change).  Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle Database Recovery Manager. CVSS 3.1 Base Score 6.8 (Availability impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H).

## Which versions are affected by CVE-2023-21918?

It affects 1 product.


Products: Oracle Database Recovery Manager.

## How do I fix CVE-2023-21918?

No fix has been published for CVE-2023-21918 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-21918 being exploited?

There is no known exploitation of CVE-2023-21918 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-21918 and fix it if it is affected.

What it is: CVE-2023-21918 is a medium-severity denial of service vulnerability in Oracle Corporation Database - Enterprise Edition, published on 18 Apr 2023. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-21918 in the wild and no public exploit code.

Affected product: Oracle Corporation Database - Enterprise Edition. 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-2023-21918/ (Markdown: https://insights.sbomify.com/CVE-2023-21918/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-21918
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-21918
- OSV: https://osv.dev/vulnerability/CVE-2023-21918

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-21918/
Summaries are generated and may contain mistakes; the official description above is the record.