CVE-2023-41890 (GCVE-0-2023-41890)

Vulnerability from cvelistv5 – Published: 2023-09-19 14:38 – Updated: 2024-10-15 18:32
VLAI?
Title
Sustainsys.Saml2 Insufficient Identity Provider Issuer Validation
Summary
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.
Severity ?
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CWE
  • CWE-289 - Authentication Bypass by Alternate Name
  • CWE-294 - Authentication Bypass by Capture-replay
Assigner
References
Impacted products
Vendor Product Version
Sustainsys Saml2 Affected: < 1.0.3
Affected: >= 2.0.0, < 2.9.2
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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