# CVE-2023-0456: Apicast proxies the api call with incorrect jwt token to the api backend without proper authorization check

> Attackers can access unauthorized information by exploiting improper JWT token validation in the APICast proxy component of Red Hat 3scale.

- **Severity:** High 7.4 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 27 Sep 2023
- **Updated:** 24 Sep 2024
- **Also known as:** GHSA-cwcc-8wqw-36gf

## What is CVE-2023-0456?

CVE-2023-0456 is a high-severity authentication bypass vulnerability in Red Hat 3scale API Management Platform 2, published on 27 Sep 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A flaw was found in APICast, when 3Scale's OIDC module does not properly evaluate the response to a mismatched token from a separate realm. This could allow a separate realm to be accessible to an attacker, permitting access to unauthorized information.

Weakness: CWE-862 (Missing Authorization), CWE-285 (Improper Authorization)

## Which versions are affected by CVE-2023-0456?

It affects 1 product.


Products: Redhat Apicast.

## How do I fix CVE-2023-0456?

No fix has been published for CVE-2023-0456 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-0456 being exploited?

There is no known exploitation of CVE-2023-0456 in the wild and no public exploit code.

## Other vulnerabilities in Red Hat 3scale API Management Platform 2

- [CVE-2021-3523](https://insights.sbomify.com/CVE-2021-3523/): Security feature bypass in apicast (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-0456 and fix it if it is affected.

What it is: CVE-2023-0456 is a high-severity authentication bypass vulnerability in Red Hat 3scale API Management Platform 2, published on 27 Sep 2023. 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-2023-0456 in the wild and no public exploit code.

Affected product: Red Hat 3scale API Management Platform 2. 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-2023-0456/ (Markdown: https://insights.sbomify.com/CVE-2023-0456/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-0456
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-0456
- OSV: https://osv.dev/vulnerability/CVE-2023-0456

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-0456/
Summaries are generated and may contain mistakes; the official description above is the record.