Published: 25/03/2020 Updated: 24/03/2021

CVSS v2 Base Score: 4.9 | Impact Score: 4.9 | Exploitability Score: 6.8

CVSS v3 Base Score: 6.8 | Impact Score: 5.2 | Exploitability Score: 1.6

VMScore: 436

Vector: AV:N/AC:M/Au:S/C:P/I:P/A:N

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. Saml2 Authentication services for ASP.NET (NuGet package Sustainsys.Saml2) greater than 2.0.0, and less than version 2.5.0 have a faulty implementation of Token Replay Detection. Token Replay Detection is an important defense measure for Single Sign On solutions. The 2.5.0 version is patched. Note that version 1.0.1 and prior versions are not affected. These versions have a correct Token Replay Implementation and are safe to use.

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sustainsys saml2

CWE-294 https://github.com/Sustainsys/Saml2/security/advisories/GHSA-g6j2-ch25-5mmv https://github.com/Sustainsys/Saml2/issues/711 https://github.com/Sustainsys/Saml2/commit/e58e0a1aff2b1ead6aca080b7cdced55ee6d5241 https://nvd.nist.gov

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CVE-2020-5261

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