# CVE-2023-33987: Request smuggling and request concatenation in SAP Web Dispatcher

> An unauthenticated attacker can exploit request smuggling in SAP Web Dispatcher to read or modify server data or cause denial of service.

- **Severity:** High 8.6 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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:** 11 Jul 2023
- **Updated:** 4 Dec 2024
- **Also known as:** GHSA-hp7v-3j27-4q36

## What is CVE-2023-33987?

CVE-2023-33987 is a high-severity vulnerability in SAP_SE SAP Web Dispatcher, published on 11 Jul 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An unauthenticated attacker in SAP Web Dispatcher - versions WEBDISP 7.49, WEBDISP 7.53, WEBDISP 7.54, WEBDISP 7.77, WEBDISP 7.81, WEBDISP 7.85, WEBDISP 7.88, WEBDISP 7.89, WEBDISP 7.90, KERNEL 7.49, KERNEL 7.53, KERNEL 7.54 KERNEL 7.77, KERNEL 7.81, KERNEL 7.85, KERNEL 7.88, KERNEL 7.89, KERNEL 7.90, KRNL64NUC 7.49, KRNL64UC 7.49, KRNL64UC 7.53, HDB 2.00, XS_ADVANCED_RUNTIME 1.00, SAP_EXTENDED_APP_SERVICES 1, can submit a malicious crafted request over a network to a front-end server which may, over several attempts, result in a back-end server confusing the boundaries of malicious and legitimate messages. This can result in the back-end server executing a malicious payload which can be used to read or modify information on the server or make it temporarily unavailable.

Weakness: CWE-444 (Inconsistent Interpretation of HTTP Requests)

## Which versions are affected by CVE-2023-33987?

It affects 1 product.


Products: Sap Web Dispatcher.

## How do I fix CVE-2023-33987?

No fix has been published for CVE-2023-33987 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-33987 being exploited?

There is no known exploitation of CVE-2023-33987 in the wild and no public exploit code.

## Other vulnerabilities in SAP_SE SAP Web Dispatcher

- [CVE-2021-38162](https://insights.sbomify.com/CVE-2021-38162/): Other in SAP Web Dispatcher (high 8.9)
- [CVE-2023-35871](https://insights.sbomify.com/CVE-2023-35871/): Memory Corruption vulnerability in SAP Web Dispatcher (high 7.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-33987 and fix it if it is affected.

What it is: CVE-2023-33987 is a high-severity vulnerability in SAP_SE SAP Web Dispatcher, published on 11 Jul 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-2023-33987 in the wild and no public exploit code.

Affected product: SAP_SE SAP Web Dispatcher. 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-2023-33987/ (Markdown: https://insights.sbomify.com/CVE-2023-33987/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-33987
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-33987
- OSV: https://osv.dev/vulnerability/CVE-2023-33987

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-33987/
Summaries are generated and may contain mistakes; the official description above is the record.