# CVE-2023-23903: DoS via SAML configuration in Guardian/CMC before 22.6.2

> An authenticated administrator can cause a denial of service by uploading a malformed SAML configuration file, rendering the application unusable.

- **Severity:** Medium 6.9 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 9 Aug 2023
- **Updated:** 20 Sep 2024
- **Also known as:** GHSA-fp89-4294-45q3

## What is CVE-2023-23903?

CVE-2023-23903 is a medium-severity denial of service vulnerability in Nozomi Networks CMC, published on 9 Aug 2023. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

An authenticated administrator can upload a SAML configuration file with the wrong format, with the application not checking the correct file format. Every subsequent application request will return an error.

The whole application in rendered unusable until a console intervention.

Weakness: CWE-1286 (Improper Validation of Syntactic Correctness of Input)

## Which versions are affected by CVE-2023-23903?

It affects 2 products.


Products: Nozominetworks Cmc, Nozominetworks Guardian.

## How do I fix CVE-2023-23903?

No fix has been published for CVE-2023-23903 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-23903 being exploited?

There is no known exploitation of CVE-2023-23903 in the wild and no public exploit code.

## Other vulnerabilities in Nozomi Networks CMC

- [CVE-2023-29245](https://insights.sbomify.com/CVE-2023-29245/): SQL Injection on IDS parsing of malformed asset fields in Guardian/CMC >= 22.6.0 before 22.6.3 and 23.1.0 (critical 9.2)
- [CVE-2026-31984](https://insights.sbomify.com/CVE-2026-31984/): DoS through oversized audit log entries in Guardian/CMC before 26.2.0 (high 8.7)
- [CVE-2023-2567](https://insights.sbomify.com/CVE-2023-2567/): Authenticated SQL Injection on Query functionality in Guardian/CMC before 22.6.3 and 23.1.0 (high 8.7)
- [CVE-2023-22378](https://insights.sbomify.com/CVE-2023-22378/): Authenticated Blind SQL Injection on sorting in Guardian/CMC before 22.6.2 (high 8.7)
- [CVE-2023-23574](https://insights.sbomify.com/CVE-2023-23574/): Authenticated Blind SQL Injection on alerts count in Guardian/CMC before 22.6.2 (high 8.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-23903 and fix it if it is affected.

What it is: CVE-2023-23903 is a medium-severity denial of service vulnerability in Nozomi Networks CMC, published on 9 Aug 2023. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-23903 in the wild and no public exploit code.

Affected product: Nozomi Networks CMC. 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-2023-23903/ (Markdown: https://insights.sbomify.com/CVE-2023-23903/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-23903
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-23903
- OSV: https://osv.dev/vulnerability/CVE-2023-23903

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-23903/
Summaries are generated and may contain mistakes; the official description above is the record.