Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Sustainsys | Saml2 | >= 2.0.0, < 2.5.0 |
Related Weaknesses (CWE)
References
- https://github.com/Sustainsys/Saml2/commit/e58e0a1aff2b1ead6aca080b7cdced55ee6d5PatchThird Party Advisory
- https://github.com/Sustainsys/Saml2/issues/711Issue TrackingThird Party Advisory
- https://github.com/Sustainsys/Saml2/security/advisories/GHSA-g6j2-ch25-5mmvThird Party Advisory
- https://github.com/Sustainsys/Saml2/commit/e58e0a1aff2b1ead6aca080b7cdced55ee6d5PatchThird Party Advisory
- https://github.com/Sustainsys/Saml2/issues/711Issue TrackingThird Party Advisory
- https://github.com/Sustainsys/Saml2/security/advisories/GHSA-g6j2-ch25-5mmvThird Party Advisory
FAQ
What is CVE-2020-5261?
CVE-2020-5261 is a vulnerability with a CVSS score of 8.2 (HIGH). 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...
How severe is CVE-2020-5261?
CVE-2020-5261 has been rated HIGH with a CVSS base score of 8.2/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-5261?
Check the references section above for vendor advisories and patch information. Affected products include: Sustainsys Saml2.