We have a web app hosted in an Azure Server (using api in an Azure Server). For security purposes we'd like to know if the server is under tls 1.2 (I suppose for a non-cloud server we'll just have to see in regedit to know it).
I've seen topics on how to disabled ssl 3 from an azure server see at :
https://azure.microsoft.com/fr-fr/blog/how-to-disable-ssl-3-0-in-azure-websites-roles-and-virtual-machines/
I suppose to enable tls 1.2 we'll have to do this kind of things ...
So my questions are :
- How to know if the azure server is under tls 1.2
- if not, how to set the azure server to tls 1.2
Thanx for your help.
As of today 2018-04-30, you can modify your site to only serve TLS 1.2 and up by going to your app service, then TLS/SSL settings, then setting your minimum TLS Version.
So after the good advice of Panagiotis, we can see this in Chrome/F12 Security, it is said that we're under TLS 1.2, but the cypher is obsolete, the question now would be how to put an up to date cypher, any idea ?
As Panagiotis Kanavos correctly points out:
Azure Websites has disabled SSL 3.0 for all sites by default to protect our customers from the vulnerability mentioned before. Customers no longer need to take any action to disable SSL 3.0 in Azure Websites.
But, here's some specific answers to your questions:
How to know if the azure server is under TLS 1.2?
Check your site with: https://www.ssllabs.com/ssltest/index.html (search for "protocol" and you'll find a list of SSL/TLS versions allowed/disallowed).
If not, how to set the azure server to TLS 1.2?
Start here: How do I disable SSL fallback and use only TLS for outbound connections in .NET? (Poodle mitigation) (requires .NET 4.6).
Then combine with this: https://www.leowkahman.com/2017/07/04/how-to-disable-tls-1-0-on-an-azure-app-service/ (not supported).
Or this: https://learn.microsoft.com/en-au/azure/app-service-web/app-service-app-service-environment-custom-settings (supported).
There are caveats to this setting. Apparently, its not just this setting that controls the transport level outbound communication. We have a situation where we are communicating with a third-party API which is only supporting TLS 1.2 and communication fails with either of this Minimum TLS version 1.0,1.1 and 1.2 on Azure App Service. The hosted app is a .Net Web API on Framework 4.7. So, we had to make this change in Global.asax --> Application_Start so the code tries to communicate with 1.2 and if it fails it tries with 1.1 and then system default.
ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12 | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls | SecurityProtocolType.SystemDefault;
Related
IBM Cloud will withdraw support to TLS 1.0 and 1.1 after March 1. In the page https://console.bluemix.net/docs/get-support/appsectls.html it says that if you try your url adding ".alt" after de subdomain and it works, then you will not have any problem. But in my case, it doesnt work, so it says that i should enable tls 1.2 but doesnt tell me how. Also, i have seen that in the "EEUU West" region there is no problem with TLS 1.2 support. Otherwise, in the "Germany" region you don't have support at first. Can you tell me how to enable TLS 1.2 in Germany region for any project? Thank you in advance.
The following information was provided by an IBM Cloud platform Architect:
If your application is hosted in Germany under the eu-de.mybluemix.net domain, then TLS 1.0 is already disabled for your application, and if your clients are able to connect to it successfully then you should be ok.
The eu-de.mybluemix.net domain does not offer the alternative alt.eu-de.mybluemix.net to test with because TLS 1.0 has always been disabled for eu-de. We will be removing TLS 1.1 from the eu-de.bluemix.net domain but it is very unlikely that your clients will be using that as that is very rare.
I've seen this article:
How do I disable SSL fallback and use only TLS for outbound connections in .NET? (Poodle mitigation)
With Azure web apps I didn't know if the IIS sites were already set up to deny earlier versions of TLS/SSL. Or should i implement a code fix like the article recommends.
I suggest that you test your app with https://www.ssllabs.com/ssltest/ or similar. There are a number of other tools (including commandline clients, although I've only used them on Linux) but the SSLLabs test is solid and useful IMO.
That should give you insight into what you may need to tweak to make it as secure as possible.
Note: I'm a Linux guy and know next to nothing about Azure, but unless I'm missing something this seems like a pretty generic question.
Each Azure Web app having default certificate you can see this certificate and it uses TLS 1.2 security certificate.'
In firfox left side of URL on browser you can click on Lock symbol to see certificate. path(Click Lock icon-->click More Information ---Click Certificate) you will see Algo and Certificate details.
Default certificate is secure for internal use in company
As I know, Azure WebApp doesn’t support it at currently. From my experience, since we don’t have enough access to configure anything in the registry in the WebApp. We can use startup task to change registry settings, if it is CloudService.
I also find some materials in the SO, more details please refer to thread.
I am trying to connect and send a message to azure service bus queue using the following code
var connectionString = "<Your connection string>";
var queueName = "<Your queue name>";
var client = QueueClient.CreateFromConnectionString(connectionString, queueName);
var message = new BrokeredMessage("This is a test message!");
client.Send(message);
This is the same code they have on their site as an example.
But while connecting, it gives an SSPI ERROR with an inner exception of 'The client and server do not possess a common algorithm'.
Also, I have disabled TLS 1.0 and SSL 3.0 in my system. Is it because of that.
Can someone help me understand what is wrong here?
The client and server do not possess a common algorithm
That's not a TCP layer problem. That's higher up in the TLS handshake and it means just that. The two parties (client and server) could not agree on a common cipher suite and the handshake failed.
Run your client's host through SSLLab's browser test (even if it's not a browser):
https://www.ssllabs.com/ssltest/viewMyClient.html
Then run the Service Bus endpoint through the server test page:
https://www.ssllabs.com/ssltest/
Compare results and enable at least one cipher suite in your client that matches what the TLS stack on the Service Bus endpoint accepts.
You should also simply try doing:
System.Net.ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;
..since you've disabled TLS 1.0 and i'm no longer sure what your .NET now defaults to, so explicitly setting the protocol version is the natural way to go.
TLS 1.2 was released back in 2008. You can be sure Azure supports it for all services, globally - check your own Service Bus namespace here!
(same story for 935x/TCP).
It's not enough to support TLS 1.2, your host must have at least one common cipher suite with the server -- use this to check your host:
https://github.com/snobu/get-schannel-ciphers (.exe under /Release/)
We encountered the exact same issue when we disabled TLS 1.0 and 1.1 (we used https://docs.nwebsec.com/projects/AzureStartupTasks/en/latest/ and also added
ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;
in Global.asax under Application_Start).
We opened a ticket with Microsoft support and found out that Azure Service Bus needs to be upgraded to .Net Framework 4.6.2 in order to support TLS 1.1 and TLS 1.2. Here are the details:
Service Bus relies on the underlying SSLStream class for secure communication for NetEventRealyBinding.
In WCF included in the .Net Framework 4.5.2, SSLStream only supports SSL 3.0 and TLS 1.0.
The WCF version in .Net Framework 4.6.2 supports TLS 1.1 and TLS 1.2 for SSLStream.
The Service Bus Service will need to be updated to use .Net Framework 4.6.2. Currently Service Bus uses OSFamily 4 https://learn.microsoft.com/en-us/azure/cloud-services/cloud-services-guestos-update-matrix#family-4-releases which has .Net Framework 4.5.2. Current plans to upgrade to .Net Framework are slated for middle of 2017.
I'll update this answer once I hear more from Microsoft.
UPDATE 2017-03-21:
Microsoft sent this workaround, which fixed the issue and allowed our code to work with TLS 1.2.
In the PowerShell script you currently use to set up TLS 1.2, add the following line. On .Net Framework 4.5.2 this will force SslStreams to use Tls 1.0/1.1/1.2. But since your machine allows only TLS 1.2, that will be used.
UpdateRegistryKey "HKLM:\SOFTWARE\Microsoft\.NETFramework\v4.0.30319" "SchUseStrongCrypto" 1 "DWORD"
In you the startup of your code add the following line, and rebuild and retest
ServiceBusEnvironment.SystemConnectivity.Mode = ConnectivityMode.Https;
I can't find details about what version of TLS is implemented by Secure Gateway.
The documentation is very detailed about how to implement TLS, but I can't find the version used.
https://www.ng.bluemix.net/docs/services/SecureGateway/index-gentopic3.html#sg_007
Where is this information available?
For the application side TLS, Secure Gateway will accept connections from applications that are using TLS 1, 1.1, 1.2. It is up to the app to decide which version of TLS to connect with. If you want to limit what version of TLS is accepted, you can use the REST API to manage the secure options of your destination. This setting is not configurable via the UI.
I want to be able to disable the TLS 1.0 protocol and the RC4 cipher on an Azure website (or Web App) and I can't figure out if it's possible or not. (edit: I am aware that SSL 3.0 is disabled by default on Azure websites but I specifically want to disable TLS 1.0)
I know what registry settings to update but the problem of course is that I don't have access to the OS.
There's the NWebsec startup tasks that allow you to configure web roles (or cloud service) but my understanding is that this solution does not apply to web apps.
Is there any workaround?
Update Jan 2017
Microsoft have completed a feature whereby TLS1.0 can be disabled via App Service Environment configuration. It's possible to set your own ciphers through the Azure resource manager or change the cipher suite order.
Details are available on the Custom configuration settings for App Service Environments page.
Original answer:
The original answer was that it is not possible to configure anything in the Registry or SSL settings in Azure web apps.
Microsoft are aware of PCI compliance changes and will update the host machines that the web apps run on in their own time frame. They announced in January 2015 that they would starting making updates on 18th July 2015 that would result in an A grade for TLS/SSL endpoints for Auzre web apps on sites like http://ssllabs.com
It's likely that this will be an on-going issue as computing power increases and more vulnerabilities are discovered and hosted web apps must rely on Microsoft to keep their servers patched and up-to-date in a timely manner.
This link has some more background information on the changes Microsoft are making: https://social.msdn.microsoft.com/Forums/azure/en-US/50f1ab33-c22a-4629-951e-b7510f6b2cbe/upgrading-tlsssl-cryptography-for-azure-web-apps?forum=windowsazurewebsitespreview
And this link also tracks the feature request that asks MS to disable insecure ciphers in Web apps:
http://feedback.azure.com/forums/169385-web-apps-formerly-websites/suggestions/7091994-disable-insecure-ciphers-in-azure-websites?page=2&per_page=20
If registry access and specific control of these settings is a requirement, the Azure options are Cloud Service WebRoles or IAAs VMs.
Vote to get MS to disable TLS 1.0