The Winbind nss_info extension (nsswitch/idmap_ad.c) in idmap_ad.so in
Samba 3.0.25 through 3.0.25c, when the "winbind nss info" option is
set to rfc2307 or sfu, grants all local users the privileges of gid 0
when the (1) RFC2307 or (2) Services for UNIX (SFU) primary group
attribute is not defined.
Note:References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
BUGTRAQ:20070911 [SECURITY] Winbind's rfc2307 & SFU nss_info plugin in Samba 3.0.25[a-c] assigns users a primary gid of 0 by default
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