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Questions tagged [saml]

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An open Single Sign On (SSO) solution for the web, a problem also addressed by OpenID.

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Do SAML responses containing encrypted assertions provide protection against MiTM attacks?

A previously asked question touches on topics which are very similar to what I am having trouble understanding. In a web application I am testing, SAML SSO is brokered using Keycloak. The SAML ...
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44 views

Automating SAML login for service users?

Is it possible to fully automate the login of a service user (i.e. a programmatic, software based "user") without user interaction? I have a service provider that's SAML protected. Basic Auth and ...
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Should a SAML Assertion whose SessionNotOnOrAfter value is exactly the same value as its AuthnInstant be treated as having an invalid session?

I am receiving SOAP requests with SAML AuthnStatements whose SessionNotOnOrAfter timestamp is EXACTLY the same value as its AuthnInstant: <saml:AuthnStatement AuthnInstant="2020-04-22T21:11:41....
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53 views

Is this possible in SAML?

Scenario: Consider a huge and diverse federation of Identity (IDPs) and Service (SPs) providers. Since trust level is generally low, Identity providers are reluctant to give out any kind of personal ...
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24 views

SSO-logged in Web Application does not log the user out. R&D says session is active at IDP, hence this is an expected behaviour

Like the title says, one of our application uses SAML based authentication and uses Okta as the IDP. After logging in, I noticed that the session remains active for many hours even after I log out of ...
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45 views

SAML and Multi-factor auth

I have an application that is a SAML SP, authenticating users via inbound SAML assertions from some other IdP. If I want to require multi-factor auth, is it a common practice to add multi-factor auth ...
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57 views

Security of a web app with AzureAD auth

The company I work for is about to publish a custom web app (hosted in AWS) that authenticates through AzureAD. That way, when someone goes to https://www.mywebap.com it is redirected to AzureAd and, ...
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1answer
75 views

SSO SP Initiated Single Sign Out - User Experience

I work on a software product that allows customers to use SAML or OAuth provisioning to their users. e.g to Azure AD. Now non technical savvy users understandably presume that logging off from our ...
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26 views

SSO and browser vs. server

We've got implementations in a browser-based system right now that does both SAML and OpenID-connect login support, but does them differently and was looking for advice on the risks. Our SAML ...
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77 views

SAML Passing a JWT token from the API to the SPA application

We are trying to implement the SAML 2.0 protocol and I stumbled upon a problem related to passing the token from the API to the client SPA application. The authentication flow goes like this: the ...
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57 views

Can I leverage Shibboleth to avoid recurring metadata exchanges with our customer?

we provide various web services for our customers, leveraging their IdP to have the customers' employees sign in with their company-issued accounts. Sometimes we operate web services for one customer ...
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106 views

Could SAML assertion/token be shared or reused between service providers?

SAML noob here, I have an idea implementing permission(authorization) outside of IdP, which effectively become a "Permission Service Provider", so say when an application (another service provider) ...
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1answer
86 views

Why sign SAML authentication requests

In SAML, signing or encrypting the assertions seems to be essential, but I'm not finding much information describing any benefits or drawbacks of signing the authentication request in real world "...
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1answer
51 views

why use a CA-signed key pair to encrypt SAML2 assertions?

I have a customer who insists upon using only certificate-authority signed key-pair certificates for encrypting SAML2 assertions. In this use case, I hold the private key in my Service Provider, and ...
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533 views

HTTP Response to a SAMLResponse POST by user agent

Looking at RFC2616, is it acceptable to return an HTTP 200 (page load) as a response to a SAMLResponse post to the SP? i.e. the user-agent loads a page instead of redirecting via a 302 / 303? Looking ...
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112 views

SSO Log Users Out Based on IP Address

We would like to implement SAML based SSO for our organization. We do not want employees to be able to access specific accounts outsides of specific hours and IP ranges. (We do not want to setup a VPN ...
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79 views

Are the default Azure AD Authentication Certificates global?

When authenticating against an AzureAD instance (using WS-Federation and SAML 2 tokens) the relying/authenticating application requests authentication metadata from a fixed URL on the auth servers, ...
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142 views

Is there a way to configure Azure AD SSO to ignore SP forceAuthn parameter?

I am trying to workaround an annoying cloud based SP initiated sign-on parameter, forceAuthn, the SP includes this in their assertion and is set to true. They do this to ensure compliance with some of ...
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1answer
82 views

If only SP (or IDP) uses Shibboleth in its SAML implementation, can the systems still communicate?

I was reading about Shibboleth's metadata -- https://wiki.shibboleth.net/confluence/display/CONCEPT/Metadata#Metadata-Use(andnon-use)ofMetadata , and how it's used to identify IDPs and service ...
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161 views

Is there a SAML scenario where you would need an encrypted assertion if you are using SSL?

I'm trying to understand the benefits of encrypting assertions in SAML requests, especially if those requests travel over SSL. As I have read, this isn't required. After authentication, if a service ...
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79 views

What prevents an identity provider from falsifying authorization in a SAML 2.0 flow?

I'm confused about something in the SAML 2.0 flow. When the initial access to the service provider is made, the service provider must first validate that the user indeed has access and so the service ...
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1answer
70 views

Shibboleth SP two resources and two IDPs

I am looking for some recommendation / advice, with the following scenario: Using apache 2.4 and Shib 2. The setup is SP initiated. Only one Apache web server I am protecting two resources. example....
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1answer
69 views

SAML Security Question

I have a SaaS app (App), and it has established SAML trust relationships with two of our clients, Acme and Foo. Acme users log in to App through an IdP-initiated flow. Foo users also log in to App ...
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502 views

Azure AD Application Proxy Security Concerns + Azure Application Gateway (WAF) Better?

I am still new to security and still learning the basics so was interested in getting some feedback on two Azure services. Edit: We are a school and the application's host 4000+ parent and student ...
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1answer
3k views

SAML assertion encryption and using same key for encryption as signing

I am working with a company that has product that supports SAML based authentication. We do not facilitate for just in time federation and only accept the user identifier in assertion responses (the ...
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1answer
1k views

SHA1 signature in a SAML request

I'm currently looking at the security of a KeyCloak implementation, which again uses SAML 2.0 identity provider. I'm not too familiar with SAML, but during the authentication, the sent SAMLRequest ...
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39 views

SAML - when creating new users, how do I get essential fields?

My company runs a saas product; as we move into enterprise customers, we're getting more and more requests for SSO. I understand the SAML workflow for authentication, and roughly how we'd implement ...
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1answer
91 views

Fool SAML authentication

My company's has given a corporate membership to Udemy, which is accessible from company's laptop only. I tried to look into it and it uses SAML. If I open my company's Udemy website on any other ...
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1answer
259 views

Attack vectors with encrypted SAML assertion response

I'm testing a web application which uses SAML SSO. SAML Response has signature and it is verified correctly if data is tampered. But I noticed that when signature is removed completely authentication ...
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1answer
179 views

Is signature validation mandatory if encrypted assertions are sent over HTTPs in SAML 2.0?

We are using SAML Web Browser SSO Profile (SAML 2.0) We have a SP using SAML2.0. All communication between IdP and SP is over HTTPs. If AuthnResponse from IdP is sent over HTTPs, is it mandatory for ...
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1answer
155 views

Is Browser based flows required for most IdP based Authentication standards?

I'm going to apologize in advance for the rambling nature of this question, I've read a lot about SAML and OIDC and other standards, just trying to understand why browsers seem to be so essential for ...
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39 views

GLUU support for SAML URI binding

I understand that GLUU uses Shibboleth for SAML. As going through the Shibboleth Protocols and interfaces, there doesn't seem to be any support for SAML URI binding. Does GLUU support URI binding? If ...
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51 views

Voting w/ SAML + BlockChain

There are a few grass roots initiatives to introduce blockchain as a ledger for election voting. My criticism of the ones I have seen, at the time I saw them, is that they did not adequately address ...
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1answer
216 views

How to setup SAML?

I am learning about SAML and already read many articles and forums but I still having confusion about setup IdP. I am using "https://simplesamlphp.org/" For example, I have 3 websites "example.com", "...
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394 views

SAML 2 | Refresh IdP Session when user is working on SP

Wanted to discuss the solution and options to refresh the IdP Session when user is actively working on the SP. The use case is that after successful SP-Initiated SSO, there are two sessions in ...
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1answer
853 views

How to get better IAM understanding

I'm getting interested in Identity and Access Management (IAM), but I find it hard to find complete and understandable explanations that suit me, surely because I started wrong. I began with ...
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342 views

Do I need to use SAML and JWT for auth in SSO web app?

I am new to SAML authentication process so I am just trying to figure out if I understand it so I can try to integrate my web app (Angular/Nodejs) to an existing portal that currently uses SAML as ...
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1answer
73 views

Are these SAML NameID's equivalent?

I have an application that uses SAML authentication, acts as an SP, and therefore parses SAMLResponses. I received notification that an IdP that communicates with my application will now start signing ...
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1answer
230 views

SAML nameID impersonation

We are using the nameId from the SAML response (in email format) to identify and authorize the incoming user on our system. Could a different authenticated user not alter the SAML response from their ...
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2answers
1k views

Where are passwords stored in SAML? On the IdP or on the SP side?

I understand the basic flow of SAML but is still unclear to me where the passwords are stored. This image shows "APP VERIFIES SAML RESPONSE & LOGS USER IN" from onelogin looks like the password ...
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1answer
96 views

Is there a way to tell if an Android app really uses SSO(Single Sign On)?

In the last few years, SSO protocols like OAuth and SAML are becoming increasingly used to enable 3rd parties access some user's resources from some service without the need for user to provide ...
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1answer
895 views

Can an SSL certificate be used to generate a SAML token

An external application (B) requires a SAML token to allow users who log into my application (A) to access it directly without having to log in again. This access is not built yet. My organization has ...
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440 views

Appropriate use of validUntil and cacheDuration in metadata

After reading the spec I'm unclear on the appropriate use of validUntil and cacheDuration in SAML metadata. Is there any danger in having a validUntil value a year or more into the future? For ...
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565 views

SSO - Client Certificate vs SAML

For me SSO is sign on where one need not type the password explicitly. I see one of the possible way to achieve it is by using Certificates loaded in browser. SAML/OAuth delegates the job of ...
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27 views

is it possible to log un-encypted assertions in saml

Our system logs assertions before we encrypt them using PROTOCOL_MESSAGE, but for some SP's doesn't encryption and there is no logging. Is there a way to log SAML assertions even when we are not ...
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1answer
217 views

Any practical Single Sign-On (SSO) protocol/traffic analysis tool/method/analyzer? [closed]

I want to analyze the SSO protocol/traffic that is deployed in real environment, such as commercial website. The challenge is that most of them are black-box. Scenario 1. I read several papers about ...
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1answer
298 views

Storing SAML Idp certificates in APP_Data folder

We provided a SAML2 Service Provider to our client, so they can use that to configure their Identity Provider to our Service Provider. My questions is about our client certificate, I'm worried that ...
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1answer
144 views

Is it possible to analyze real Single Sign-On (SSO) messages via network sniffing?

I am thinking how to gain and analyze the information in the real SSO (request/response) messages, for some commercial SSO solutions. The challenge is that most commercial SSO solutions are black-box ...
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1answer
48 views

Verification methods of IDP in SAML2 IDP initiated login

What are the methods we can use to verify Identity Provider in Identity Provider initiated login in SAML2 Single sign on (SAML2 SSO)? Can any one who has access to IDP private key are able to create a ...
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1answer
2k views

Do we need CSRF protection for WS-Federation Passive Requestor Profile?

Consider the steps involved in WS-Federation Passive Requestor Profile1: The above figure shows a sequence diagram of a user (requestor) accessing a web application with his browser. Since the user ...

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