# CVE-2021-40088: Missing authorization in n/a

> A missing authorization check in EJBCA allows a tenant to revoke certificates belonging to other tenants when using CMP RA Mode with shared client certificates.

- **Severity:** Medium 5.4 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 25 Aug 2021
- **Updated:** 4 Aug 2024
- **Also known as:** BIT-ejbca-2021-40088, GHSA-vw75-3c43-6g3p

## What is CVE-2021-40088?

CVE-2021-40088 is a medium-severity missing authorization vulnerability in n/a, published on 25 Aug 2021. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

An issue was discovered in PrimeKey EJBCA before 7.6.0. CMP RA Mode can be configured to use a known client certificate to authenticate enrolling clients. The same RA client certificate is used for revocation requests as well. While enrollment enforces multi tenancy constraints (by verifying that the client certificate has access to the CA and Profiles being enrolled against), this check was not performed when authenticating revocation operations, allowing a known tenant to revoke a certificate belonging to another tenant.

Weakness: CWE-862 (Missing Authorization)

## Which versions are affected by CVE-2021-40088?

1 open source package ship an affected version, including ejbca. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `ejbca` | Bitnami | All versions | 7.6.0 |

Products: Primekey Ejbca.

## How do I fix CVE-2021-40088?

Upgrade ejbca to 7.6.0 or later.

## Is CVE-2021-40088 being exploited?

There is no known exploitation of CVE-2021-40088 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2022-34831](https://insights.sbomify.com/CVE-2022-34831/): Business logic in n/a (critical 9.8)
- [CVE-2020-11630](https://insights.sbomify.com/CVE-2020-11630/): Deserialization in n/a (critical 9.8)
- [CVE-2020-11627](https://insights.sbomify.com/CVE-2020-11627/): Cross-site request forgery in n/a (high 8.8)
- [CVE-2020-25276](https://insights.sbomify.com/CVE-2020-25276/): Security feature bypass in n/a (high 7.3)
- [CVE-2020-11629](https://insights.sbomify.com/CVE-2020-11629/): File upload in n/a (high 7.2)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-40088 and fix it if it is affected.

What it is: CVE-2021-40088 is a medium-severity missing authorization vulnerability in n/a, published on 25 Aug 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-40088 in the wild and no public exploit code.

Affected packages and fixed versions:
- ejbca (Bitnami): affected all versions; fixed in 7.6.0

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-2021-40088/ (Markdown: https://insights.sbomify.com/CVE-2021-40088/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-40088
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-40088
- OSV: https://osv.dev/vulnerability/CVE-2021-40088

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-40088/
Summaries are generated and may contain mistakes; the official description above is the record.