Vishnu Ks 28a3dcf787 registration: Check realm against PreregistrationUser realm. ...

We would allow a user with a valid invitation for one realm to use it
on a different realm instead.  On a server with multiple realms, an
authorized user of one realm could use this (by sending invites to
other email addresses they control) to create accounts on other
realms. (CVE-2017-0910)

With this commit, when sending an invitation, we record the inviting
user's realm on the PreregistrationUser row; and when registering a
user, we check that the PregistrationUser realm matches the realm the
user is trying to register on.  This resolves CVE-2017-0910 for
newly-sent invitations; the next commit completes the fix.

[greg: rewrote commit message]

2017-11-22 14:42:28 -08:00

167 KiB

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