Join GitHub today
GitHub is home to over 31 million developers working together to host and review code, manage projects, and build software together.Sign up
Issue where APOP authentication is incorrectly used #3278
Attempting to connect to a POP3 server with < and > characters in its greeting line fails because the logic in pop3_state_servergreet_resp in pop3.c assumes that text between the < and > characters is always a timestamp to be used for APOP authentication.
In this case the greeting was:
where a.b.c is the domain name of the server.
APOP requires that the text within < > corresponds to the msg-id syntax of RFC-822. This means that at the very least it must contain the @ character.
As a result of the assumption that the characters between < > is a timestamp, a connection to this server cannot be established.
libcurl version 7.62
I have fixed the issue in my CURL source, and attached an updated pop3.c (uploaded as pop3.txt). The text marked rmm9831 is my fix.