Date: Wed, 3 Jan 2001 03:56:06 +0000 (GMT) From: George Reid <greid@ukug.uk.freebsd.org> To: me@me.me.com Cc: freebsd-bugs@freebsd.org Subject: Re: misc/24034: "CWD" discloses the full "real" path in a chroot environment (freebsd 4.2-stable aprox december 11th) Message-ID: <Pine.BSF.4.21.0101030354330.29361-100000@sobek.openirc.co.uk> In-Reply-To: <200101030326.f033QDa61649@freefall.freebsd.org>
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On Tue, 2 Jan 2001 me@me.me.com wrote:
> >Description:
> A user in the /etc/ftpchroot file shouldn't be able to disclose the "Real" directory they are in.
> >How-To-Repeat:
> 1) Connect to a freebsd ftp server /w a valid account that is chrooted (i.e. the ftp "/" directory is really "/somedir/whatever/")
> 2) "CWD" will show you 550 CWD /somedir/whatever/[servername]: no such file or directory
This patch fixes:
Index: ftpcmd.y
===================================================================
RCS file: /usr/cvs/src/libexec/ftpd/ftpcmd.y,v
retrieving revision 1.19
diff -u -r1.19 ftpcmd.y
--- ftpcmd.y 2000/12/16 19:19:19 1.19
+++ ftpcmd.y 2001/01/03 03:52:35
@@ -76,6 +76,7 @@
extern int logged_in;
extern struct passwd *pw;
extern int guest;
+extern int dochroot;
extern int paranoid;
extern int logging;
extern int type;
@@ -505,7 +506,7 @@
| CWD check_login CRLF
{
if ($2) {
- if (guest)
+ if (guest || dochroot)
cwd("/");
else
cwd(pw->pw_dir);
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