Mendix SAML (Mendix 7 compatible): Improper Authentication
CVE-2023-29129 is a critical-severity improper authentication vulnerability in Mendix SAML (Mendix 7 compatible) from Siemens, with a CVSS 3.1 base score of 9.8 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected Mendix SAML (Mendix 7 compatible) versions: All versions >= V1.17.3 < V1.18.0; All versions >= V1.16.4 < V1.17.3. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.89% chance of exploitation within 30 days, higher than 60% of scored CVEs.
Critical severity: a successful attack would have severe impact.
What to do
- Update Saml to 1.18.0 or 2.4.0 or 3.6.1, whichever matches your release line, or a later version.
- Read the advisory on cert-portal.siemens.com for workarounds and exact fixed builds.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Siemens | Mendix SAML (Mendix 7 compatible) | All versions >= V1.17.3 < V1.18.0; All versions >= V1.16.4 < V1.17.3 | Not stated |
| Siemens | Mendix SAML (Mendix 8 compatible) | All versions >= V2.3.0 < V2.4.0; All versions >= V2.2.0 < V2.3.0 | Not stated |
| Siemens | Mendix SAML (Mendix 9 latest compatible, New Track) | All versions >= V3.3.1 < V3.6.1; All versions >= V3.1.9 < V3.3.1 | Not stated |
| Siemens | Mendix SAML (Mendix 9 latest compatible, Upgrade Track) | All versions >= V3.3.0 < V3.6.0; All versions >= V3.1.8 < V3.3.0 | Not stated |
| Siemens | Mendix SAML (Mendix 9.12/9.18 compatible, New Track) | All versions >= V3.3.1 < V3.3.15 | Not stated |
| Siemens | Mendix SAML (Mendix 9.12/9.18 compatible, Upgrade Track) | All versions >= V3.3.0 < V3.3.14 | Not stated |
| Siemens | Mendix SAML (Mendix 9.6 compatible, New Track) | All versions >= V3.1.9 < V3.2.7 | Not stated |
| Siemens | Mendix SAML (Mendix 9.6 compatible, Upgrade Track) | All versions >= V3.1.8 < V3.2.6 | Not stated |
| Mendix | Saml | 1.16.4 up to, but not including, 1.18.0; 2.2.0 up to, but not including, 2.4.0; 3.1.8 up to, but not including, 3.6.1 | 1.18.0, 2.4.0, 3.6.1 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 9.1 | Critical | CNA (siemens.com) |
| CVSS 3.1 | 9.8 | Critical | NVD |
Official description
A vulnerability has been identified in Mendix SAML (Mendix 7 compatible) (All versions >= V1.17.3 < V1.18.0), Mendix SAML (Mendix 7 compatible) (All versions >= V1.16.4 < V1.17.3), Mendix SAML (Mendix 8 compatible) (All versions >= V2.3.0 < V2.4.0), Mendix SAML (Mendix 8 compatible) (All versions >= V2.2.0 < V2.3.0), Mendix SAML (Mendix 9 latest compatible, New Track) (All versions >= V3.3.1 < V3.6.1), Mendix SAML (Mendix 9 latest compatible, New Track) (All versions >= V3.1.9 < V3.3.1), Mendix SAML (Mendix 9 latest compatible, Upgrade Track) (All versions >= V3.3.0 < V3.6.0), Mendix SAML (Mendix 9 latest compatible, Upgrade Track) (All versions >= V3.1.8 < V3.3.0), Mendix SAML (Mendix 9.12/9.18 compatible, New Track) (All versions >= V3.3.1 < V3.3.15), Mendix SAML (Mendix 9.12/9.18 compatible, Upgrade Track) (All versions >= V3.3.0 < V3.3.14), Mendix SAML (Mendix 9.6 compatible, New Track) (All versions >= V3.1.9 < V3.2.7), Mendix SAML (Mendix 9.6 compatible, Upgrade Track) (All versions >= V3.1.8 < V3.2.6). The affected versions of the module insufficiently verify the SAML assertions. This could allow unauthenticated remote attackers to bypass authentication and get access to the application. This CVE entry describes the incomplete fix for CVE-2023-25957 in a specific non default configuration.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Authentication
When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.
How developers prevent this class of flaw
- Use an authentication framework or library such as the OWASP ESAPI Authentication feature.
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: yes, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Other vulnerabilities in Mendix SAML (Mendix 7 compatible)
- 7.5 High severity
- 9.8 Critical severity
- 9.8 Critical severity
Recent Improper Authentication vulnerabilities
- 3.9 Low severity
VMware Tools Authentication Bypass Exploited
- 9.8 Critical severity
- 9.8 Critical severity
- 9.1 Critical severity
- 9.8 Critical severity
- 9.8 Critical severity
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