# CVE-2018-2433: Denial of service in SAP Gateway

> An attacker can prevent legitimate users from accessing SAP Gateway services by crashing or flooding the system.

- **Severity:** High 7.5 (`CVSS:3.0/AV:N/AC:L/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:** 10 Jul 2018
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-wv65-jfgx-wm66

## What is CVE-2018-2433?

CVE-2018-2433 is a high-severity denial of service vulnerability in SAP Gateway, published on 10 Jul 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

SAP Gateway (SAP KERNEL 32 NUC, SAP KERNEL 32 Unicode, SAP KERNEL 64 NUC, SAP KERNEL 64 Unicode 7.21, 7.21EXT, 7.22 and 7.22EXT; SAP KERNEL 7.21, 7.22, 7.45, 7.49 and 7.53) allows an attacker to prevent legitimate users from accessing a service, either by crashing or flooding the service.

## Which versions are affected by CVE-2018-2433?

It affects 1 product.


Products: Sap Sap Kernel.

## How do I fix CVE-2018-2433?

No fix has been published for CVE-2018-2433 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-2433 being exploited?

There is no known exploitation of CVE-2018-2433 in the wild and no public exploit code.

## Other vulnerabilities in SAP Gateway

- [CVE-2017-16689](https://insights.sbomify.com/CVE-2017-16689/): Auth bypass in Trusted RFC connection (high 8.8)
- [CVE-2019-0365](https://insights.sbomify.com/CVE-2019-0365/): Denial of service in SAP GUI for Java (BC-FES-JAV) (high 7.5)
- [CVE-2018-2360](https://insights.sbomify.com/CVE-2018-2360/): Missing authorization in SAP Startup Service (high 7.5)
- [CVE-2017-5997](https://insights.sbomify.com/CVE-2017-5997/): Denial of service in n/a (high 7.5)
- [CVE-2014-9594](https://insights.sbomify.com/CVE-2014-9594/): Memory corruption in n/a (medium 6.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-2433 and fix it if it is affected.

What it is: CVE-2018-2433 is a high-severity denial of service vulnerability in SAP Gateway, published on 10 Jul 2018. 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-2018-2433 in the wild and no public exploit code.

Affected product: SAP Gateway. 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-2018-2433/ (Markdown: https://insights.sbomify.com/CVE-2018-2433/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-2433
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-2433
- OSV: https://osv.dev/vulnerability/CVE-2018-2433

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-2433/
Summaries are generated and may contain mistakes; the official description above is the record.