diff -uNr samba-3.0.5.org/source/smbd/uid.c samba-3.0.5/source/smbd/uid.c
--- samba-3.0.5.org/source/smbd/uid.c	Fri Jul 23 11:08:55 2004
+++ samba-3.0.5/source/smbd/uid.c	Fri Jul 23 18:47:15 2004
@@ -250,7 +250,20 @@
 		}
 		must_free_token = True;
 	}
-	
+
+	/*
+	 * when security = share, Samba should checks for write list and 
+	 * read list parameters for this particular user.
+	 */
+
+	if (lp_security() == SEC_SHARE) {
+		user_struct tmpuser;
+		fstrcpy(tmpuser.user.unix_name, conn->user);
+		tmpuser.groups = conn->groups;
+		tmpuser.n_groups = conn->ngroups;
+		conn->read_only = is_share_read_only_for_user(conn, &tmpuser);
+	}
+
 	set_sec_ctx(uid, gid, current_user.ngroups, current_user.groups, token);
 
 	/*