# CVE-2021-21469: Information disclosure in SAP NetWeaver Master Data Management

> Attackers can exploit insecure MDS server configurations to perform SMB relay attacks and obtain sensitive data via UNC paths.

- **Severity:** Medium 5.3 (`CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 12 Jan 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-8r9q-9pvc-52xq

## What is CVE-2021-21469?

CVE-2021-21469 is a medium-severity vulnerability in SAP NetWeaver Master Data Management, published on 12 Jan 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

When security guidelines for SAP NetWeaver Master Data Management running on windows have not been thoroughly reviewed, it might be possible for an external operator to try and set custom paths in the MDS server configuration. When no adequate protection has been enforced on any level (e.g., MDS Server password not set, network and OS configuration not properly secured, etc.), a malicious user might define UNC paths which could then be exploited to put the system at risk using a so-called SMB relay attack and obtain highly sensitive data, which leads to Information Disclosure.

Weakness: CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor)

## Which versions are affected by CVE-2021-21469?

It affects 1 product.


Products: Sap Netweaver Master Data Management.

## How do I fix CVE-2021-21469?

No fix has been published for CVE-2021-21469 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-21469 being exploited?

There is no known exploitation of CVE-2021-21469 in the wild and no public exploit code.

## Other vulnerabilities in SAP NetWeaver Master Data Management

- [CVE-2021-21482](https://insights.sbomify.com/CVE-2021-21482/): Auth bypass in SAP NetWeaver Master Data Management (high 8.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-21469 and fix it if it is affected.

What it is: CVE-2021-21469 is a medium-severity vulnerability in SAP NetWeaver Master Data Management, published on 12 Jan 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2021-21469 in the wild and no public exploit code.

Affected product: SAP NetWeaver Master Data Management. 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-2021-21469/ (Markdown: https://insights.sbomify.com/CVE-2021-21469/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-21469
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-21469
- OSV: https://osv.dev/vulnerability/CVE-2021-21469

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-21469/
Summaries are generated and may contain mistakes; the official description above is the record.