Description
The local_handler_callback function in server/responder/pam/pam_LOCAL_domain.c in sssd 0.4.1 does not properly handle blank-password accounts in the SSSD BE database, which allows context-dependent attackers to obtain access by sending the account's username, in conjunction with an arbitrary password, over an ssh connection.
References
- 36018 third-party-advisory
- https://bugzilla.redhat.com/attachment.cgi?id=355424
- https://bugzilla.redhat.com/show_bug.cgi?id=514057
- 35868 vdb-entry
- sssd-localhandlercallback-security-bypass(52210) vdb-entry
- FEDORA-2009-8101 vendor-advisory