15 Feb
2017
15 Feb
'17
1:02 a.m.
On Feb 14, 2017, at 5:50 PM, Joseph Tam jtam.home@gmail.com wrote:
Another related security situation I've encountered is when a fraudster has phished a user's password. A user/admin changes the password, but forgets to invalidate dovecot's cached entry, allowing the fraudster contunuing access to the mail account until the TTL expires or user logs in with new credentials. I've been burnt by this one.
I’m no expert, but should the code that updates the password hash in the database also immediately try to log into dovecot for the user with a fake password?
Authentication should fail but the cache would be updated?
Or, doesn’t Dovecot expire the cache’d entry on failed authentication?