diff -Nur sendmail-8.12.2.orig/sendmail/main.c sendmail-8.12.2/sendmail/main.c

--- sendmail-8.12.2.orig/sendmail/main.c	Thu Jan 17 12:55:04 2002

+++ sendmail-8.12.2/sendmail/main.c	Thu Jan 17 12:59:22 2002

@@ -1196,6 +1196,18 @@

 		macdefine(&BlankEnvelope.e_macro, A_PERM,

 			  macid("{daemon_flags}"), "c u");

 	}

+	if (OpMode == MD_INITALIAS &&

+	    RealUid != 0 &&

+	    RealUid != TrustedUid &&

+	    !wordinclass(RealUserName, 't'))

+	{

+		if (LogLevel > 1)

+			sm_syslog(LOG_ALERT, NOQID,

+				  "user %d attempted to rebuild the alias map",

+				  RealUid);

+ 		usrerr("Permission denied");

+ 		finis(false, true, EX_USAGE);

+ 	}

 	/*

 	**  Do basic initialization.