CVSS: 7.8EPSS: 0%CPEs: 2EXPL: 0CVE-2023-41890 – Sustainsys.Saml2 Insufficient Identity Provider Issuer Validation
https://notcve.org/view.php?id=CVE-2023-41890
19 Sep 2023 — 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 pro... • https://github.com/Sustainsys/Saml2/issues/712 • CWE-289: Authentication Bypass by Alternate Name CWE-294: Authentication Bypass by Capture-replay •
CVSS: 7.3EPSS: 0%CPEs: 2EXPL: 0CVE-2020-5268 – Subject Confirmation Method not validated in Saml2 Authentication Services for ASP.NET
https://notcve.org/view.php?id=CVE-2020-5268
21 Apr 2020 — In Saml2 Authentication Services for ASP.NET versions before 1.0.2, and between 2.0.0 and 2.6.0, there is a vulnerability in how tokens are validated in some cases. Saml2 tokens are usually used as bearer tokens - a caller that presents a token is assumed to be the subject of the token. There is also support in the Saml2 protocol for issuing tokens that is tied to a subject through other means, e.g. holder-of-key where possession of a private key must be proved. The Sustainsys.Saml2 library incorrectly trea... • https://github.com/Sustainsys/Saml2/commit/e58e0a1aff2b1ead6aca080b7cdced55ee6d5241 • CWE-287: Improper Authentication CWE-303: Incorrect Implementation of Authentication Algorithm •
CVSS: 8.2EPSS: 0%CPEs: 1EXPL: 0CVE-2020-5261 – Missing Token Replay Detection
https://notcve.org/view.php?id=CVE-2020-5261
25 Mar 2020 — Saml2 Authentication services for ASP.NET (NuGet package Sustainsys.Saml2) greater than 2.0.0, and less than version 2.5.0 has a faulty implementation of Token Replay Detection. Token Replay Detection is an important defence in depth measure for Single Sign On solutions. The 2.5.0 version is patched. Note that version 1.0.1 is not affected. It has a correct Token Replay Implementation and is safe to use. • https://github.com/Sustainsys/Saml2/commit/e58e0a1aff2b1ead6aca080b7cdced55ee6d5241 • CWE-294: Authentication Bypass by Capture-replay •