# CVE-2021-2256: Auth bypass in Cloud Infrastructure

> Unauthenticated attackers can take over the Oracle Storage Cloud Software Appliance via HTTP, leading to full system compromise.

- **Severity:** Critical 10.0 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/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:** 22 Apr 2021
- **Updated:** 26 Sep 2024
- **Also known as:** GHSA-chfm-q9vj-99fm

## What is CVE-2021-2256?

CVE-2021-2256 is a critical authentication bypass vulnerability in Oracle Corporation Cloud Infrastructure, published on 22 Apr 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Vulnerability in the Oracle Storage Cloud Software Appliance product of Oracle Storage Gateway (component: Management Console). The supported version that is affected is Prior to 16.3.1.4.2. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Oracle Storage Cloud Software Appliance. While the vulnerability is in Oracle Storage Cloud Software Appliance, attacks may significantly impact additional products. Successful attacks of this vulnerability can result in takeover of Oracle Storage Cloud Software Appliance. Note: Updating the Oracle Storage Cloud Software Appliance to version 16.3.1.4.2 or later will address these vulnerabilities. Download the latest version of Oracle Storage Cloud Software Appliance from <a href=" https://www.oracle.com/downloads/cloud/oscsa-downloads.html">here. Refer to Document <a href="https://support.oracle.com/rstype=doc&id=2768897.1">2768897.1 for more details. CVSS 3.1 Base Score 10.0 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H).

## Which versions are affected by CVE-2021-2256?

It affects 1 product.


Products: Oracle Storage Cloud Software Appliance.

## How do I fix CVE-2021-2256?

No fix has been published for CVE-2021-2256 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-2256 being exploited?

There is no known exploitation of CVE-2021-2256 in the wild and no public exploit code.

## Other vulnerabilities in Oracle Corporation Cloud Infrastructure

- [CVE-2021-2257](https://insights.sbomify.com/CVE-2021-2257/): Information disclosure in Cloud Infrastructure (medium 4.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-2256 and fix it if it is affected.

What it is: CVE-2021-2256 is a critical authentication bypass vulnerability in Oracle Corporation Cloud Infrastructure, published on 22 Apr 2021. 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-2021-2256 in the wild and no public exploit code.

Affected product: Oracle Corporation Cloud Infrastructure. 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-2021-2256/ (Markdown: https://insights.sbomify.com/CVE-2021-2256/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-2256
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-2256
- OSV: https://osv.dev/vulnerability/CVE-2021-2256

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From sbomify Insights: https://insights.sbomify.com/CVE-2021-2256/
Summaries are generated and may contain mistakes; the official description above is the record.