From a392fe0bdb7081117c445f5dcc98d5ed4013dc17 Mon Sep 17 00:00:00 2001
From: peter <peter@FreeBSD.org>
Date: Thu, 25 Nov 1999 18:03:05 +0000
Subject: [PATCH] Apply the sendmail 8.9.3 denial-of-service patch which
 prevents untrusted users from running newaliases.  (This is to protect
 aliases.db against truncation).

PR:		15088
---
 contrib/sendmail/src/main.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/contrib/sendmail/src/main.c b/contrib/sendmail/src/main.c
index cea9d158d711..cb6fd57e44c0 100644
--- a/contrib/sendmail/src/main.c
+++ b/contrib/sendmail/src/main.c
@@ -984,6 +984,18 @@ main(argc, argv, envp)
 		usrerr("Permission denied");
 		finis(FALSE, EX_USAGE);
 	}
+	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, EX_USAGE);
+ 	}
 
 	if (MeToo)
 		BlankEnvelope.e_flags |= EF_METOO;