# CVE-2023-40309: Missing Authorization check in SAP CommonCryptoLib

> An authenticated attacker can bypass authorization checks in SAP CommonCryptoLib to escalate privileges and access restricted data.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/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:** 12 Sep 2023
- **Updated:** 28 Sep 2024
- **Also known as:** GHSA-42qx-rv8j-r8f3

## What is CVE-2023-40309?

CVE-2023-40309 is a critical missing authorization vulnerability in Sap Netweaver Application Server Abap, published on 12 Sep 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

SAP CommonCryptoLib does not perform necessary authentication checks, which may result in missing or wrong authorization checks for an authenticated user, resulting in escalation of privileges. Depending on the application and the level of privileges acquired, an attacker could abuse functionality restricted to a particular user group as well as read, modify or delete restricted data.

Weakness: CWE-863 (Incorrect Authorization)

## Which versions are affected by CVE-2023-40309?

It affects 9 products.


Products: Sap Commoncryptolib, Sap Content Server, Sap Extended Application Services and Runtime, Sap Hana Database, Sap Host Agent, Sap Netweaver Application Server Abap, Sap Netweaver Application Server Java, Sap Sapssoext, Sap Web Dispatcher.

## How do I fix CVE-2023-40309?

No fix has been published for CVE-2023-40309 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-40309 being exploited?

There is no known exploitation of CVE-2023-40309 in the wild and no public exploit code.

## Other vulnerabilities in Sap Netweaver Application Server Abap

- [CVE-2023-40308](https://insights.sbomify.com/CVE-2023-40308/): Memory Corruption vulnerability in SAP CommonCryptoLib (high 7.5)
- [CVE-2021-38177](https://insights.sbomify.com/CVE-2021-38177/): Null dereference in SAP CommonCryptoLib (high 7.5)
- [CVE-2014-8587](https://insights.sbomify.com/CVE-2014-8587/): Security feature bypass in n/a (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-40309 and fix it if it is affected.

What it is: CVE-2023-40309 is a critical missing authorization vulnerability in Sap Netweaver Application Server Abap, published on 12 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-2023-40309 in the wild and no public exploit code.

Affected product: Sap Netweaver Application Server Abap. 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-2023-40309/ (Markdown: https://insights.sbomify.com/CVE-2023-40309/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-40309
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-40309
- OSV: https://osv.dev/vulnerability/CVE-2023-40309

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-40309/
Summaries are generated and may contain mistakes; the official description above is the record.