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SAML 2.0 SLO is not provided a session index #3936

Description

@kompetenzlandkarte

Describe the Bug

Trying using the SAML SLO functionality I get this error:

<samlp:StatusMessage>Missing SessionIndex: session participants MUST include at least one <SessionIndex> element in the logout request</samlp:StatusMessage>

Steps to Reproduce

Configure SAML Authentication with SLO functionality based on the documentation

Expected Behaviour

<SessionIndex> Object included in SLO Request

Screenshots or Additional Context

Currently the SLO Request looks like this:

<samlp:LogoutRequest
    xmlns:samlp="urn:oasis:names:tc:SAML:2.0:protocol"
    xmlns:saml="urn:oasis:names:tc:SAML:2.0:assertion"
    ID="redacted"
    Version="2.0"
    IssueInstant="2022-12-28T10:00:34Z"
    Destination="redacted">
    <saml:Issuer>https://redacted/saml2/metadata</saml:Issuer>
    <saml:NameID Format="urn:oasis:names:tc:SAML:1.1:nameid-format:emailAddress">redacted</saml:NameID>
</samlp:LogoutRequest>

SAML Login Response (mostly truncated) - Includes SessionIndex

<samlp:Response Version="2.0" ID="redacted" IssueInstant="2022-12-28T10:08:33.861Z" InResponseTo="redacted" Destination="https://redacted/saml2/acs" xmlns:samlp="urn:oasis:names:tc:SAML:2.0:protocol">
    <saml:Assertion ID="redacted" IssueInstant="2022-12-28T10:08:33.894Z" Version="2.0" xmlns:saml="urn:oasis:names:tc:SAML:2.0:assertion">
        <saml:AuthnStatement SessionIndex="redacted" AuthnInstant="2022-12-28T10:08:33.885Z">
            <saml:AuthnContext>
                <saml:AuthnContextClassRef>urn:oasis:names:tc:SAML:2.0:ac:classes:unspecified</saml:AuthnContextClassRef>
            </saml:AuthnContext>
        </saml:AuthnStatement>
    </saml:Assertion>
</samlp:Response>

Browser Details

No response

Exact BookStack Version

v22.11

PHP Version

No response

Hosting Environment

Inside official Docker Container on our Kubernetes Instance.

Activity

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