# CVE-2021-2416: Denial of service in Communications Session Border Controller

> A high-privileged attacker can cause a complete denial of service on the Oracle Communications Session Border Controller via HTTP.

- **Severity:** Medium 4.9 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 20 Oct 2021
- **Updated:** 25 Sep 2024
- **Also known as:** GHSA-7m6p-jwwh-9w78

## What is CVE-2021-2416?

CVE-2021-2416 is a medium-severity denial of service vulnerability in Oracle Corporation Communications Session Border Controller, published on 20 Oct 2021. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

Vulnerability in the Oracle Communications Session Border Controller product of Oracle Communications (component: Routing). Supported versions that are affected are 8.4 and 9.0. Easily exploitable vulnerability allows high privileged attacker with network access via HTTP to compromise Oracle Communications Session Border Controller. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle Communications Session Border Controller. CVSS 3.1 Base Score 4.9 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H).

## Which versions are affected by CVE-2021-2416?

It affects 1 product.


Products: Oracle Communications Session Border Controller.

## How do I fix CVE-2021-2416?

No fix has been published for CVE-2021-2416 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-2416 being exploited?

There is no known exploitation of CVE-2021-2416 in the wild and no public exploit code.

## Other vulnerabilities in Oracle Corporation Communications Session Border Controller

- [CVE-2021-2414](https://insights.sbomify.com/CVE-2021-2414/): Information disclosure in Communications Session Border Controller (medium 6.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-2416 and fix it if it is affected.

What it is: CVE-2021-2416 is a medium-severity denial of service vulnerability in Oracle Corporation Communications Session Border Controller, published on 20 Oct 2021. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-2416 in the wild and no public exploit code.

Affected product: Oracle Corporation Communications Session Border Controller. 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-2021-2416/ (Markdown: https://insights.sbomify.com/CVE-2021-2416/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-2416
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-2416
- OSV: https://osv.dev/vulnerability/CVE-2021-2416

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-2416/
Summaries are generated and may contain mistakes; the official description above is the record.