---
title: "CVE-2024-45409\n    | Ubuntu"
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2024-45409?format=md
keywords: index, follow
---

# CVE-2024-45409

Publication date 10 September 2024

Last updated 26 August 2025

---

Ubuntu priority

**Medium**

[Why this priority?](https://ubuntu.com/security/cves/about#priority )

## Cvss 3 Severity Score

**9.8 · Critical**

[Score breakdown](https://ubuntu.com/security/CVE-2024-45409?format=md#impact-score)

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## Description

The Ruby SAML library is for implementing the client side of a SAML
authorization. Ruby-SAML in <= 12.2 and 1.13.0 <= 1.16.0 does not properly
verify the signature of the SAML Response. An unauthenticated attacker with
access to any signed saml document (by the IdP) can thus forge a SAML
Response/Assertion with arbitrary contents. This would allow the attacker
to log in as arbitrary user within the vulnerable system. This
vulnerability is fixed in 1.17.0 and 1.12.3.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| ruby-saml | 24.10 oracular | Fixed 1.15.0-1ubuntu0.24.10.1 |
| 24.04 LTS noble | Fixed 1.15.0-1ubuntu0.24.04.1 |
| 22.04 LTS jammy | Fixed 1.13.0-1ubuntu0.1 |
| 20.04 LTS focal | Fixed 1.11.0-1ubuntu0.1 |
| 18.04 LTS bionic | Fixed 1.7.2-1ubuntu0.1~esm1  Ubuntu Pro |
| 16.04 LTS xenial | Fixed 1.1.2-1ubuntu1+esm1  Ubuntu Pro |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)
* [Patch details](https://ubuntu.com/security/CVE-2024-45409?format=md#patch-details)

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### Patch details

For informational purposes only. We recommend not to cherry-pick updates. [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)

| Package | Patch details |
| --- | --- |
| ruby-saml | * Upstream:   [4865d03](https://github.com/SAML-Toolkits/ruby-saml/commit/4865d030cae9705ee5cdb12415c654c634093ae7) * Upstream:   [1ec5392](https://github.com/SAML-Toolkits/ruby-saml/commit/1ec5392bc506fe43a02dbb66b68741051c5ffeae) |

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

9.8 · Critical

* Base metrics

  | Parameter | Value |
  | --- | --- |
  | Attack vector | Network |
  | Attack complexity | Low |
  | Privileges required | None |
  | User interaction | None |
  | Scope | Unchanged |
  | Confidentiality impact | High |
  | Integrity impact | High |
  | Availability impact | High |
* Scores

  | Parameter | Value |
  | --- | --- |
  | Base score | 9.8 · Critical |
  | Exploitability score | - |
  | Impact score | - |

**Vector:** CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-45409)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2024-45409)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2024-45409)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2024-45409)

### Related Ubuntu Security Notices (USN)

+ [USN-7309-1](https://usn.ubuntu.com/USN-7309-1)
+ Ruby SAML vulnerabilities
+ 28 February 2025

### Other references

* <https://www.cve.org/CVERecord?id=CVE-2024-45409>
* <https://github.com/SAML-Toolkits/ruby-saml/security/advisories/GHSA-jw9c-mfg7-9rx2>