PT-2023-28147 · Sustainsys+1 · Sustainsys.Saml2+1

C53Robin

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Published

2023-09-19

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Updated

2023-12-19

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CVE-2023-41890

CVSS v3.1

7.5

High

VectorAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Name of the Vulnerable Software and Affected Versions Sustainsys.Saml2 versions prior to 1.0.3 Sustainsys.Saml2 versions prior to 2.9.2
Description The Sustainsys.Saml2 library adds SAML2P support to ASP.NET web sites, allowing the web site to act as a SAML2 Service Provider. 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).
Recommendations For versions prior to 1.0.3, update to version 1.0.3 or later. For versions prior to 2.9.2, update to version 2.9.2 or later. As a temporary workaround, consider using the AcsCommandResultCreated notification to add the validation required if an upgrade to patched packages is not possible.

Exploit

Fix

Weakness Enumeration

CWE-294CWE-289

Related Identifiers

CVE-2023-41890
GHSA-FV2H-753J-9G39

Affected Products

Asp.Net
Sustainsys.Saml2