Upgrading to OSX Catalina 10.15 or iOS 13 fixes the problem. OSX Mojave 10.14 and iOS 12 are known to have compatibility problems with the new behavior. The problem is dependent on the underlying OS version. Ensure you test Safari 12 and 13 as well as WebKit-based, OS-style logins using Microsoft Authentication Library (MSAL), Active Directory Authentication Library (ADAL), or whichever library you're using.
#CODE CHICKEN CORE 1.11 CODE#
This must be avoided via the browser sniffing code shown in Support older browsers. Safari 12 strictly implemented the prior draft and fails if it sees the new None value in cookies.
#CODE CHICKEN CORE 1.11 DOWNLOAD#
Follow the instructions at Download Chromium. You can, however, download older versions of Chromium, which will suffice for testing. Google doesn't make older Chrome versions available. For more information, see Support older browsers. Chrome 75 and earlier are reported to fail with the new None setting. To test the new behavior, toggle chrome://flags/#same-site-by-default-cookies to enabled. With the appropriate test flags enabled, Chrome 76 and 77 yield more accurate results. Those versions have a temporary mitigation in place and allow cookies less than two minutes old. ChromeĬhrome 78 and later yield misleading test results. Verify that your app is compatible with older client versions after you've applied the patches, especially Safari. Chrome, Firefox, and Microsoft Edge Chromium all have new opt-in feature flags that can be used for testing.
Test your web app using a client version that can opt into the new behavior.
#CODE CHICKEN CORE 1.11 UPDATE#
The update redefines the behavior of SameSiteMode.None to emit SameSite=None and adds a new value SameSiteMode.Unspecified to omit the SameSite attribute. See SameSite Updates for the Chrome product launch timeline.ĪSP.NET Core 3.1 has been updated to implement the new SameSite behavior. The new None parameter causes compatibility problems with clients that implemented the prior draft standard (for example, iOS 12). Most OAuth logins aren't affected because of differences in how the request flows. Lax suffices for most app cookies however, it breaks cross-site scenarios like OpenID Connect and WS-Federation login. The standard changes the default mode to Lax and adds a new entry None to opt out. Google proposed a new draft standard that isn't backwards compatible.
ASP.NET Core 2.0 added initial support for SameSite. This was originally designed as a feature the servers would opt into by adding the new parameters. It's intended to mitigate Cross-Site Request Forgery (CSRF). SameSite is a 2016 draft standard extension to HTTP cookies. The app needs to sniff these versions and omit SameSite.įor discussion on this issue, see dotnet/aspnetcore#14996. However, SameSite=None breaks on iOS 12 and some older versions of other browsers. The changes impact remote authentication scenarios, such as OpenID Connect and WS-Federation, which must opt out by sending SameSite=None.
Some browsers, such as Chrome and Firefox, made breaking changes to their implementations of SameSite for cookies. HTTP: Browser SameSite changes impact authentication HTTP: Browser SameSite changes impact authentication.NET Core or ASP.NET Core, the breaking changes listed in this article may affect your app.
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