Date: Fri, 28 Feb 2003 15:32:46 GMT From: Jeremy Prior <jez@chagford.netcraft.com> To: FreeBSD-gnats-submit@FreeBSD.org Subject: bin/48784: No way to disable directory listings in ftpd Message-ID: <200302281532.h1SFWj8A005539@chagford.netcraft.com>
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>Number: 48784
>Category: bin
>Synopsis: No way to disable directory listings in ftpd
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: change-request
>Submitter-Id: current-users
>Arrival-Date: Fri Feb 28 07:40:07 PST 2003
>Closed-Date:
>Last-Modified:
>Originator: Jeremy Prior
>Release: FreeBSD 4.7-STABLE i386
>Organization:
Netcraft Ltd
>Environment:
System: FreeBSD chagford.netcraft.com 4.7-STABLE FreeBSD 4.7-STABLE #1: Fri Jan 17 21:34:17 GMT 2003 root@chagford.netcraft.com:/usr/obj/usr/src/sys/CHAGFORD i386
>Description:
We need to run a customer-facing ftpd that doesn't allow
directory listings. The base system's one can be made to
prevent this if the right bits are lopped-out. :-)
>How-To-Repeat:
Connect to ftpd and type `dir'
>Fix:
Patch follows:
--- ftpd.diff begins here ---
Index: Makefile
===================================================================
RCS file: /usr/cvs/src/libexec/ftpd/Makefile,v
retrieving revision 1.33.2.6
diff -u -r1.33.2.6 Makefile
--- Makefile 11 Feb 2003 14:28:28 -0000 1.33.2.6
+++ Makefile 28 Feb 2003 13:51:32 -0000
@@ -12,10 +12,14 @@
LDADD= -lskey -lmd -lcrypt -lutil
DPADD= ${LIBSKEY} ${LIBMD} ${LIBCRYPT} ${LIBUTIL}
+.if defined(NO_LISTINGS)
+CFLAGS+=-DNO_LISTINGS
+.else
LSDIR= ../../bin/ls
.PATH: ${.CURDIR}/${LSDIR}
SRCS+= ls.c cmp.c print.c util.c
CFLAGS+=-Dmain=ls_main -I${.CURDIR}/${LSDIR}
+.endif
DPADD+= ${LIBM}
LDADD+= -lm
Index: ftpcmd.y
===================================================================
RCS file: /usr/cvs/src/libexec/ftpd/ftpcmd.y,v
retrieving revision 1.16.2.19
diff -u -r1.16.2.19 ftpcmd.y
--- ftpcmd.y 11 Feb 2003 14:28:28 -0000 1.16.2.19
+++ ftpcmd.y 28 Feb 2003 14:01:34 -0000
@@ -475,25 +475,33 @@
}
| NLST check_login CRLF
{
+#ifndef NO_LISTINGS
if ($2)
send_file_list(".");
+#endif
}
| NLST check_login SP pathstring CRLF
{
+#ifndef NO_LISTINGS
if ($2)
send_file_list($4);
free($4);
+#endif
}
| LIST check_login CRLF
{
+#ifndef NO_LISTINGS
if ($2)
retrieve(_PATH_LS " -lgA", "");
+#endif
}
| LIST check_login SP pathstring CRLF
{
+#ifndef NO_LISTINGS
if ($2)
retrieve(_PATH_LS " -lgA %s", $4);
free($4);
+#endif
}
| STAT check_login SP pathname CRLF
{
@@ -1127,8 +1135,10 @@
{ "DELE", DELE, STR1, 1, "<sp> file-name" },
{ "CWD", CWD, OSTR, 1, "[ <sp> directory-name ]" },
{ "XCWD", CWD, OSTR, 1, "[ <sp> directory-name ]" },
+#ifndef NO_LISTINGS
{ "LIST", LIST, OSTR, 1, "[ <sp> path-name ]" },
{ "NLST", NLST, OSTR, 1, "[ <sp> path-name ]" },
+#endif
{ "SITE", SITE, SITECMD, 1, "site-cmd [ <sp> arguments ]" },
{ "SYST", SYST, ARGS, 1, "(get type of operating system)" },
{ "STAT", STAT, OSTR, 1, "[ <sp> path-name ]" },
Index: ftpd.c
===================================================================
RCS file: /usr/cvs/src/libexec/ftpd/ftpd.c,v
retrieving revision 1.62.2.48
diff -u -r1.62.2.48 ftpd.c
--- ftpd.c 14 Feb 2003 12:42:42 -0000 1.62.2.48
+++ ftpd.c 28 Feb 2003 13:51:34 -0000
@@ -2970,6 +2970,7 @@
send_file_list(whichf)
char *whichf;
{
+#ifndef NO_LISTINGS
struct stat st;
DIR *dirp = NULL;
struct dirent *dir;
@@ -3100,6 +3101,7 @@
freeglob = 0;
globfree(&gl);
}
+#endif
}
void
Index: popen.c
===================================================================
RCS file: /usr/cvs/src/libexec/ftpd/popen.c,v
retrieving revision 1.18.2.3
diff -u -r1.18.2.3 popen.c
--- popen.c 9 Aug 2001 00:53:18 -0000 1.18.2.3
+++ popen.c 11 Aug 2001 08:09:21 -0000
@@ -143,6 +143,7 @@
}
(void)close(pdes[1]);
}
+#ifndef NO_LISTINGS
if (strcmp(gargv[0], _PATH_LS) == 0) {
/* Reset getopt for ls_main() */
optreset = optind = optopt = 1;
@@ -157,6 +158,7 @@
}
exit(ls_main(gargc, gargv));
}
+#endif
execv(gargv[0], gargv);
_exit(1);
}
--- ftpd.diff ends here ---
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