The winbind_name_list_to_sid_string_list function in
nsswitch/pam_winbind.c in Samba through 4.1.2 handles invalid
require_membership_of group names by accepting authentication by any
user, which allows remote authenticated users to bypass intended
access restrictions in opportunistic circumstances by leveraging an
administrator's pam_winbind configuration-file mistake.
Note:References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MLIST:[oss-security] 20131202 Re: CVE request: samba pam_winbind authentication fails open
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