Hi !

libntp/msyslog.c has a buffer overflow error. Buffer allocated for log
messages is 1025 bytes. With longer messages you get an overflow.

For a quick test use ntpdate `perl -e "print 'A'x10000"`

Here's quick patch:
--- xntp3-5.93/libntp/msyslog.c~        Tue Aug 12 09:21:29 1997
+++ xntp3-5.93/libntp/msyslog.c Mon Aug 21 16:10:31 2000
@@ -141,7 +141,8 @@
          *n++ = '\n';
        *n = '\0';
 
-       vsprintf(buf, nfmt, ap);
+       /* Oh no ;-) */
+       vsnprintf(buf, 1024, nfmt, ap);
 #if !defined(VMS) && !defined (SYS_VXWORKS)
        if (syslogit)
 #ifndef SYS_WINNT

-Jarno