Sustainsys.Saml2 up to 1.0.2/2.9.1 authentication by alternate name

Summaryinfo

A vulnerability described as problematic has been identified in Sustainsys.Saml2 up to 1.0.2/2.9.1. This issue affects some unknown processing. The manipulation results in authentication by alternate name. This vulnerability was named CVE-2023-41890. The attack may be performed from remote. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as problematic has been found in Sustainsys.Saml2 up to 1.0.2/2.9.1. Affected is an unknown code block. The manipulation with an unknown input leads to a authentication by alternate name vulnerability. CWE is classifying the issue as CWE-289. The product performs authentication based on the name of a resource being accessed, or the name of the actor performing the access, but it does not properly check all possible names for that resource or actor. This is going to have an impact on integrity. CVE summarizes:

Sustainsys.Saml2 library adds SAML2P support to ASP.NET web sites, allowing the web site to act as a SAML2 Service Provider. Prior to versions 1.0.3 and 2.9.2, when a response is processed, the issuer of the Identity Provider is not sufficiently validated. This could allow a malicious identity provider to craft a Saml2 response that is processed as if issued by another identity provider. It is also possible for a malicious end user to cause stored state intended for one identity provider to be used when processing the response from another provider. An application is impacted if they rely on any of these features in their authentication/authorization logic: the issuer of the generated identity and claims; or items in the stored request state (AuthenticationProperties). This issue is patched in versions 2.9.2 and 1.0.3. The `AcsCommandResultCreated` notification can be used to add the validation required if an upgrade to patched packages is not possible.

The weakness was presented 09/19/2023 as 712. The advisory is available at github.com. This vulnerability is traded as CVE-2023-41890 since 09/04/2023. The technical details are unknown and an exploit is not available.

Upgrading to version 1.0.3 or 2.9.2 eliminates this vulnerability.

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Productinfo

Name

• Sustainsys.Saml2

Version

• 1.0.0
• 1.0.1
• 1.0.2
• 2.9.0
• 2.9.1

CPE 2.3info

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CPE 2.2info

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