# CVE-2018-16956: Denial of service in n/a

> Attackers can cause denial of service by renaming pages with unsupported characters, affecting Oracle WebCenter Interaction Portal.

- **Severity:** Medium 6.5 (`CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 18 Sep 2018
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-vhr5-9373-hv6v

## What is CVE-2018-16956?

CVE-2018-16956 is a medium-severity denial of service vulnerability in n/a, published on 18 Sep 2018. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

The AjaxControl component of Oracle WebCenter Interaction Portal 10.3.3 does not validate the names of pages when processing page rename requests. Pages can be renamed to include characters unsupported for URIs by the web server hosting the WCI Portal software (such as IIS). Renaming pages to include unsupported characters, such as 0x7f, prevents these pages from being accessed over the web server, causing a Denial of Service (DoS) to the page. NOTE: this CVE is assigned by MITRE and isn't validated by Oracle because Oracle WebCenter Interaction Portal is out of support.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2018-16956?

It affects 1 product.


Products: Oracle Webcenter Interaction.

## How do I fix CVE-2018-16956?

No fix has been published for CVE-2018-16956 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-16956 being exploited?

There is no known exploitation of CVE-2018-16956 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2018-16957](https://insights.sbomify.com/CVE-2018-16957/): Hardcoded credentials in n/a (critical 9.8)
- [CVE-2018-16952](https://insights.sbomify.com/CVE-2018-16952/): Cross-site request forgery in n/a (high 8.8)
- [CVE-2018-16953](https://insights.sbomify.com/CVE-2018-16953/): Cross-site scripting in n/a (medium 6.1)
- [CVE-2018-16954](https://insights.sbomify.com/CVE-2018-16954/): Open redirect in n/a (medium 6.1)
- [CVE-2018-16955](https://insights.sbomify.com/CVE-2018-16955/): Cross-site scripting in n/a (medium 6.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-16956 and fix it if it is affected.

What it is: CVE-2018-16956 is a medium-severity denial of service vulnerability in n/a, published on 18 Sep 2018. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2018-16956 in the wild and no public exploit code.

Affected product: n/a. 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-2018-16956/ (Markdown: https://insights.sbomify.com/CVE-2018-16956/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-16956
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-16956
- OSV: https://osv.dev/vulnerability/CVE-2018-16956

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-16956/
Summaries are generated and may contain mistakes; the official description above is the record.