** Description changed: [SRU] 2.71: https://bugs.launchpad.net/ubuntu/+source/snapd/+bug/2118396 [ Impact ] - Kerberos snap does not have access to to the host \tmp\krb5cc* as - required to access ticket information. + Programs that use Kerberos do not have access to Kerberos' tickets (by + default, /tmp/krb5cc*) if snapped, resulting in denied access to + documents that the user would otherwise be able to access if the program + weren't snapped. [ Test Plan ] - Requires Kerberos setup with a version of the snap that uses the new - interface + Requires a server that uses Kerberos authentication and a Ubuntu client, + that for the following tests is presumed to have logged into the + server's realm. 1. Reproduce on snapd deb < 2.71 - Install and setup Kerberos using a Kerberos snap with the kerberos- - tickets interface + Install the Firefox snap. - Expect: - - websites that used to work with SPNEGO/GSSAPI/kerberos no longer work - - no kerberos-tickets interface + Expect: + - websites that used to work with SPNEGO/GSSAPI/kerberos do not work (access denied). + - 'snap connect firefox:kerberos-tickets' fails because Snapd < 2.71 does not yet have the corresponding slot. 2. Prove fix on snapd 2.71 - Ensure kerberos-tickets interface is connected + First connect the new plug: - Expect: previously problematic websites to work + snap connect firefox:kerberos-tickets + + Then access a document from said server, it should work. + + [ Regression potential ] + + Unauthorized snaps (i.e., without kerberos-tickets connection) have + access to the tickets. + + Snaps fail to launch due to some bug in the implementation logic merged + in https://github.com/canonical/snapd/pull/15519. ---original--- Workaround ---------- Add default_ccache_name = FILE:/run/user/%{euid}/krb5cc to the [libdefaults] section of /etc/krb5.conf so that the Kerberos credentials are stored in a file path a snapped application can read. Acknowledgement: For many that can't work for {different reasons}, as stated in multiple comments below. Nonetheless it is worth a mention. Original report --------------- I configure AuthServerWhitelist as documented: https://www.chromium.org/developers/design-documents/http-authentication and can see my whitelisted domains in chrome://policy/ but websites that used to work with SPNEGO/GSSAPI/kerberos no longer work. I'm guessing the snap needs some sort of permission to use the kerberos ticket cache (or the plumbing to do so doesn't exist...). I can confirm that Chrome has the desired behavior.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1849346 Title: [snap] kerberos GSSAPI no longer works after deb->snap transition To manage notifications about this bug go to: https://bugs.launchpad.net/firefox/+bug/1849346/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
