# CVE-2024-9487: Auth bypass in Enterprise Server

> Attackers can bypass SAML SSO authentication to gain unauthorized access and provision users if encrypted assertions are enabled.

- **Severity:** Critical 9.5 (`CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L/R:U/V:C/RE:M/U:Red`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 10 Oct 2024
- **Updated:** 11 Oct 2024
- **Also known as:** GHSA-g83h-4727-5rpv

## What is CVE-2024-9487?

CVE-2024-9487 is a critical authentication bypass vulnerability in Github Enterprise Server, published on 10 Oct 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An improper verification of cryptographic signature vulnerability was identified in GitHub Enterprise Server that allowed SAML SSO authentication to be bypassed resulting in unauthorized provisioning of users and access to the instance. Exploitation required the encrypted assertions feature to be enabled, and the attacker would require direct network access as well as a signed SAML response or metadata document. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.15 and was fixed in versions 3.11.16, 3.12.10, 3.13.5, and 3.14.2. This vulnerability was reported via the GitHub Bug Bounty program.

Weakness: CWE-347 (Improper Verification of Cryptographic Signature)

## Which versions are affected by CVE-2024-9487?

It affects 1 product.


Products: Github Enterprise Server.

## How do I fix CVE-2024-9487?

No fix has been published for CVE-2024-9487 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-9487 being exploited?

There is no known exploitation of CVE-2024-9487 in the wild and no public exploit code.

## Other vulnerabilities in Github Enterprise Server

- [CVE-2024-4985](https://insights.sbomify.com/CVE-2024-4985/): Auth bypass in Enterprise Server (critical 10.0)
- [CVE-2022-23739](https://insights.sbomify.com/CVE-2022-23739/): Missing authorization in GitHub Enterprise Server (critical 9.8)
- [CVE-2022-46255](https://insights.sbomify.com/CVE-2022-46255/): Improper Limitation of a Pathname to a Restricted Directory in GitHub Enterprise Server leading to RCE (critical 9.8)
- [CVE-2021-22869](https://insights.sbomify.com/CVE-2021-22869/): Improper access control in GitHub Enterprise Server allows self-hosted runners to execute outside their control group (critical 9.8)
- [CVE-2024-6800](https://insights.sbomify.com/CVE-2024-6800/): Auth bypass in GitHub Enterprise Server (critical 9.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-9487 and fix it if it is affected.

What it is: CVE-2024-9487 is a critical authentication bypass vulnerability in Github Enterprise Server, published on 10 Oct 2024. 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-2024-9487 in the wild and no public exploit code.

Affected product: Github Enterprise Server. 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-2024-9487/ (Markdown: https://insights.sbomify.com/CVE-2024-9487/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-9487
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-9487
- OSV: https://osv.dev/vulnerability/CVE-2024-9487

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-9487/
Summaries are generated and may contain mistakes; the official description above is the record.