CVE-2020-5268

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 treats all incoming tokens as bearer tokens, even though they have another subject confirmation method specified. This could be used by an attacker that could get access to Saml2 tokens with another subject confirmation method than bearer. The attacker could then use such a token to create a log in session. This vulnerability is patched in versions 1.0.2 and 2.7.0.
Configurations

Configuration 1 (hide)

OR cpe:2.3:a:sustainsys:saml2:*:*:*:*:*:*:*:*
cpe:2.3:a:sustainsys:saml2:*:*:*:*:*:*:*:*

History

21 Nov 2024, 05:33

Type Values Removed Values Added
CVSS v2 : 4.9
v3 : 7.3
v2 : 4.9
v3 : 6.5
References () https://github.com/Sustainsys/Saml2/commit/e58e0a1aff2b1ead6aca080b7cdced55ee6d5241 - Patch, Third Party Advisory () https://github.com/Sustainsys/Saml2/commit/e58e0a1aff2b1ead6aca080b7cdced55ee6d5241 - Patch, Third Party Advisory
References () https://github.com/Sustainsys/Saml2/issues/712 - Third Party Advisory () https://github.com/Sustainsys/Saml2/issues/712 - Third Party Advisory
References () https://github.com/Sustainsys/Saml2/security/advisories/GHSA-9475-xg6m-j7pw - Mitigation, Third Party Advisory () https://github.com/Sustainsys/Saml2/security/advisories/GHSA-9475-xg6m-j7pw - Mitigation, Third Party Advisory
References () https://www.nuget.org/packages/Sustainsys.Saml2/ - Third Party Advisory () https://www.nuget.org/packages/Sustainsys.Saml2/ - Third Party Advisory

Information

Published : 2020-04-21 17:15

Updated : 2024-11-21 05:33


NVD link : CVE-2020-5268

Mitre link : CVE-2020-5268

CVE.ORG link : CVE-2020-5268


JSON object : View

Products Affected

sustainsys

  • saml2
CWE
CWE-303

Incorrect Implementation of Authentication Algorithm

CWE-287

Improper Authentication