ipa 3.0 does not properly check server identity before sending credential containing cookies
The client in FreeIPA 2.x and 3.x before 3.1.2 does not properly obtain the Certification Authority (CA) certificate from the server, which allows man-in-the-middle attackers to spoof a join procedure via a crafted certificate.
Sumit Bose discovered that FreeIPA's directory server (dirsrv) would segfault if an unauthenicated user attempted to connect to it with a missing username/dn. According to RFC 3062, connecting without specifying the username/dn is valid.
Acknowledgements:
This issue was discovered by Sumit Bose of Red Hat.