# CVE-2016-0896: Security feature bypass in n/a

> Attackers can bypass network restrictions in Pivotal Cloud Foundry by accessing the metadata service due to overly permissive security group rules.

- **Severity:** High 7.3 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 18 Sep 2016
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-crwx-2x7c-cgpf

## What is CVE-2016-0896?

CVE-2016-0896 is a high-severity vulnerability in n/a, published on 18 Sep 2016. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Pivotal Cloud Foundry (PCF) Elastic Runtime before 1.6.34 and 1.7.x before 1.7.12 places 169.254.0.0/16 in the all_open Application Security Group, which might allow remote attackers to bypass intended network-connectivity restrictions by leveraging access to the 169.254.169.254 address.

Weakness: CWE-254

## Which versions are affected by CVE-2016-0896?

It affects 1 product.


Products: Pivotal Software Cloud Foundry Elastic Runtime.

## How do I fix CVE-2016-0896?

No fix has been published for CVE-2016-0896 yet. Limit exposure of the affected software until one is available.

## Is CVE-2016-0896 being exploited?

There is no known exploitation of CVE-2016-0896 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2017-2773](https://insights.sbomify.com/CVE-2017-2773/): Auth bypass in PCF Elastic Runtime (critical 9.8)
- [CVE-2017-4955](https://insights.sbomify.com/CVE-2017-4955/): Information disclosure in PCF Elastic Runtime (critical 9.8)
- [CVE-2017-4959](https://insights.sbomify.com/CVE-2017-4959/): Auth bypass in PCF Elastic Runtime (high 8.8)
- [CVE-2016-6657](https://insights.sbomify.com/CVE-2016-6657/): Open redirect in PCF Elastic Runtime 1.8.x versions prior to 1.8.12 and PCF Ops Manager 1.7.x versions prior to 1.7.18 and 1.8.x versions prior to 1.8.10 (high 7.4)
- [CVE-2016-0926](https://insights.sbomify.com/CVE-2016-0926/): Cross-site scripting in n/a (medium 6.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2016-0896 and fix it if it is affected.

What it is: CVE-2016-0896 is a high-severity vulnerability in n/a, published on 18 Sep 2016. 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-2016-0896 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-2016-0896/ (Markdown: https://insights.sbomify.com/CVE-2016-0896/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2016-0896
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2016-0896
- OSV: https://osv.dev/vulnerability/CVE-2016-0896

---
From sbomify Insights: https://insights.sbomify.com/CVE-2016-0896/
Summaries are generated and may contain mistakes; the official description above is the record.