# CVE-2018-2439: Denial of service in SAP Internet Graphics Server (IGS)

> Attackers can crash the SAP Internet Graphics Server by sending malformed data packets due to insufficient input validation in HTTP, RFC, and portwatcher components.

- **Severity:** Medium 5.9 (`CVSS:3.0/AV:N/AC:H/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-4pmw-67xf-m59m

## What is CVE-2018-2439?

CVE-2018-2439 is a medium-severity denial of service vulnerability in SAP Internet Graphics Server (IGS), published on 10 Jul 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The SAP Internet Graphics Server (IGS), 7.20, 7.20EXT, 7.45, 7.49, 7.53, has insufficient request validation (for example, where the request is validated for authenticity and validity) and under certain conditions, will process invalid requests. Several areas of the SAP Internet Graphics Server (IGS) did not require sufficient input validation. Namely, the SAP Internet Graphics Server (IGS) HTTP and RFC listener, SAP Internet Graphics Server (IGS) portwatcher when registering a portwatcher to the multiplexer and the SAP Internet Graphics Server (IGS) multiplexer had insufficient input validation and thus allowing a malformed data packet to cause a crash.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2018-2439?

It affects 1 product.


Products: Sap Internet Graphics Server.

## How do I fix CVE-2018-2439?

No fix has been published for CVE-2018-2439 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-2439 being exploited?

There is no known exploitation of CVE-2018-2439 in the wild and no public exploit code.

## Other vulnerabilities in SAP Internet Graphics Server (IGS)

- [CVE-2006-6346](https://insights.sbomify.com/CVE-2006-6346/): Information disclosure in n/a (critical 10.0)
- [CVE-2018-2437](https://insights.sbomify.com/CVE-2018-2437/): Command injection in SAP Internet Graphics Server (IGS) (critical 9.1)
- [CVE-2018-2395](https://insights.sbomify.com/CVE-2018-2395/): File upload in SAP Internet Graphics Server (high 8.8)
- [CVE-2018-2438](https://insights.sbomify.com/CVE-2018-2438/): Denial of service in SAP Internet Graphics Server (IGS) (high 7.5)
- [CVE-2018-2392](https://insights.sbomify.com/CVE-2018-2392/): XML external entity in SAP Internet Graphics Server (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-2439 and fix it if it is affected.

What it is: CVE-2018-2439 is a medium-severity denial of service vulnerability in SAP Internet Graphics Server (IGS), 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-2018-2439 in the wild and no public exploit code.

Affected product: SAP Internet Graphics Server (IGS). 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-2018-2439/ (Markdown: https://insights.sbomify.com/CVE-2018-2439/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-2439
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-2439
- OSV: https://osv.dev/vulnerability/CVE-2018-2439

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-2439/
Summaries are generated and may contain mistakes; the official description above is the record.