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Questions tagged [sso]

Single Sign-On is when a user can use the same set of authentication credentials to access multiple different services.

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25 views

Single Sign On: Concept for multiple resources and login server below the same domain

I am learning about SSO right now and am trying to work out a way to authenticate a few websites under the same domain (example.com), based on the setups I read about in the internet. I would prefer ...
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3answers
202 views

Is it advisable to create a system that stores passwords?

Please bear with me, I'm a total newbie about security. I work in a company whose main goal is to maximize profits and use free stuff as much as possible. It's effect is that we use tons of freeware ...
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0answers
24 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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26 views

SSO using SAML 2.0/OIDC

I have a scenario in mind and I am wondering if this is, in general, a drawback to SSO using SAML 2.0/OIDC or if there are any known ways to mitigate such a scenario: Background: 1. A user is able to ...
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1answer
76 views

SSO level of trust external identity providers

I'm wondering how much I should trust our clients and their SSO implementations. We have an identity provider set up for @our-domain.com and most users of that domain have a lot of rights in our ...
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0answers
42 views

'Fake SSO & self registration' access to a web api

I was asked to design and implement a solution that I have some security concerns about. The customer has a web application into which users log in using their credentials. The customer wants to add ...
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1answer
60 views

SSO authentication & authorization architecture/implemenation

We got a bunch of different services (SPAs + API GW, legacy JavaEE apps, etc.). Each of those is usually ran in multiple instances (customer specific instances). The plan is to federate them under a ...
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1answer
174 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
154 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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1answer
36 views

Do you need to validate compensating controls of a certified organization?

Our web application uses Google's G Suite Single Sign-on for authentication into our application. As part of writing documentation around compensating controls, the PCI DSS requires "Validation of ...
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0answers
32 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
201 views

Using third party authentication like google/facebook to login to a site, is there any security risk when the site is hacked?

Sites like stackoverflow, quora, and many more offers sign in from Google/Facebook. In the event that there is a data breach or the site is hacked, is there any security risk to your Google/Facebook ...
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1answer
60 views

Where to save the token information?

I'm currently working on an end user Windows 10 application using the Microsoft UWP platform. Within this application the end user will be able to authenticate themselves using an oauth2 SSO service. ...
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1answer
77 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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0answers
22 views

Passing token/session values from one application to its sub application

My client currently has an existing ASP.NET web portal, which runs fine. It's hosted on their on-premise IIS Server. I will call this one the "parent application". Now I'm working on another web ...
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1answer
89 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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1answer
239 views

How could this SSO implementation possibly work without browser cookies?

Our corporate Windows 7 desktop setup is now using SSO with our Confluence instance (browser-based wiki-type website) but the strangest thing is that even after logging out AND clearing the browser ...
5
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1answer
410 views

Is it secure to use CORS to implement SSO?

I implement SSO to integrate some web login mechanism to the centralized member system which is OAuth2 provider. And currently OAuth2 authorization works well. However, I would like to implement much ...
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1answer
2k views

OpenID Connect: How to maintain a single sign-on experience between multiple web clients of the same umbrella application?

I'm considering how to take a fairly complex tiered application with multiple web apps that delegate back to the same application server, and migrate it to use OIDC authentication with auth code flow. ...
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3answers
1k views

Best practice for connecting publicly available server to internal LDAP/Active Directory?

We have a public website. The site also contains the intranet (although none of the data on the intranet pages are terribly secret). Users have to login to the website using their Active Directory ...
5
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1answer
2k views

How to implement cross-domain, auto-login SSO without browser redirects for unlogged users?

I need to implement an SSO solution with the following requirements: Cross-domain: Let's assume I have a.com, b.com and sso.com. If I become logged in through a.com, I shouldn't need to login when I ...
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2answers
852 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
94 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
286 views

Do we need to maintain Authentication and Authorization Logic separately? [closed]

We are using Keycloak Identity server which will take care of Authentication and Authorization for our new Multi Level Marketing Website. There was a discussion going on within our team to maintain ...
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2answers
304 views

Would it be possible to store Kerberos tickets on a YubiKey?

Kerberos supports different ways (ccache types) of storing tickets, such as: FILE MEMORY KEYRING I was wondering whether it would technically be possible to also store the Ticket-granting-ticket and ...
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0answers
2k views

Exception: krb_error 0 Do not have keys of types listed in default_tkt_enctypes

I am looking for your help with one Exception we are getting while setting up our Kerberos SSO. I will briefly give an overview of our setup and things we tried till now and exception we are getting: ...
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1answer
137 views

Reasons to limit password length [duplicate]

We are currently using a third party software for SSO Login in a hybrid landscape with SAP, ADFS, etc. The users have to change their password in the client software, which is then sent to a central ...
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0answers
488 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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1answer
187 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
207 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
102 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
143 views

SSO: Who is the idp (identity provider) for Google Apps?

If I am a user for different Google Apps. Google Apps (gmail, google calender, games logging in using Google email account, etc.) are different service providers. Who will be the identity provider (...
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1answer
131 views

Is JSON web token further secured in OpenID, and how?

I have read the details of pure JSON web token (JWT), and found that it is signed (e.g. by SHA256) but not encrypted. Hence, attack can read the sensitive information by decoding the header and ...
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1answer
41 views

Claims based authentication to log on to a device

Are there operating systems that allow logging on to the device (laptop, tablet etc.) using claims based authentication?
3
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1answer
508 views

Encrypting data and SSO

I provide a service in which users can store data, files, etc in an encrypted form. The service that I have built has two applications for the user's password with which they login to my service: 1) ...
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0answers
42 views

Objectively speaking, what is the expected standard to prepare for an interview as network admin? [closed]

I have an interview middle of next month for a position as network admin. As I understand things, clients are running Windows but some servers may be running Linux. What is the expected standard in ...
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1answer
147 views

Is SSO/OAuth inherently broken?

The way I understand it, the whole concept of OAuth/SSO involves allowing a user the ability to have a central password they can use on a multitude of sites without compromising it because really they'...
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1answer
73 views

SSO Understainding Credentials and Authentication [closed]

I would like to create a SSO where my users can login to machines and wordpress (php) websites. So far I have LDAP with Kerberos working. I can login with the same credentials to every service, ...
5
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1answer
5k views

Self-signed certificate for a IdP-initiated SAML SSO

We act as a Service Provider in a SAML SSO integration with our customers. During the dev and stage testing, we usually exchange metadata files and SSO endpoints. When forming our metadata we use the ...
2
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1answer
231 views

Why do we need IdP when directory services already authenticate and authorize users?

Why do we need Identity Providers when enabling SSO? Why can't directory services do it itself when they already have users identity and can verify it (I'm thinking here about MS AD and the need of AD ...
4
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1answer
297 views

Can password based SSO be trivially compromised?

Many cloud SSO providers now offer "password based SSO" (e.g. https://docs.microsoft.com/en-us/azure/active-directory/active-directory-appssoaccess-whatis ), where, even if the SaaS you want to log in ...
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1answer
37 views

SSO DNS SRV lookup

I'm pen testing the page (IdpInitiatedSignOn.aspx) of a web app which uses an SSO mechanism (Active Directoy Federated Services). The username field requires a domain (e.g. company) to preface the ...
2
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3answers
2k views

HTTPS and encrypted cookie for session

Currently I am developing an SSO system with CAS. CAS uses an ticket granting ticket (TGT) that can be seen as the SSO-session. CAS by default will encrypt the TGT. And by default you also have HTTPS ...
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2answers
453 views

Is MD5 suitable for single sign on?

We are using an application which offers single sign to their systems which is then embedded as an iframe (i.e. the URL is visible in the source of the page) The SSO security comes from using MD5 to ...
1
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1answer
361 views

ADFS with multiple IDP stops doing the SSO [closed]

I'm facing an issue when we enable a second IDP (add Claims Provider Trust), then we are not able to navigate between apps without stopping in the HRD (Home Realm Discovery) page. Is there a way to ...
1
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1answer
1k views

Is SSO without SSL possible and/or secure?

Lets imagine a site where HTTPS is not used, for any good or bad reasons. The admin of this site still need a way to secure connections and think about using unique authentication with social networks ...
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1answer
30 views

Client app auto-updating passwords, no SSO [closed]

My customer has an ActiveDirectory server and a work server, both without SSO. Employees use their ActiveDirectory account to connect to the work server. They change passwords every month. My app ...
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1answer
730 views

2FA using Kerberos and SSO within CDE

I was wondering if anyone is using Kerberos for their 2FA solution into their CDE for PCI DSS compliance. Also what does PCI DSS say about SSO once 2FA has occured through Raduis Server. Thanks for ...
1
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2answers
926 views

Is it safe to allow HTTP for SAML 2.0 Issuer URL?

I've implemented SAML 2.0 using the ruby-saml gem in my Rails app. In this app, clients can specify their SAML idp for their account. I have a client who insists that requiring HTTPS for the Issuer ...
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1answer
37 views

Instant signin links for users from trusted third party sites

I'm owning web app "A" and want to work with a third party service "X". User "Alice" has accounts on both platforms. App A knows the user ID of alice on X, but X doesn't care about Alice being on A or ...