CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS
Percentile
24.5%
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:
Patched in version 2.9.2 and 1.0.3. All previous versions are vulnerable.
The AcsCommandResultCreated
notification can be used to add the validation required if an upgrade to patched packages is not possible.
The patch is linked to https://github.com/Sustainsys/Saml2/issues/712 and https://github.com/Sustainsys/Saml2/issues/713
Vendor | Product | Version | CPE |
---|---|---|---|
* | sustainsys.saml2 | * | cpe:2.3:a:*:sustainsys.saml2:*:*:*:*:*:*:*:* |