Subj : FTP deleting files from previous directory for s255 user?
To   : g00r00
From : Bj”rn Wiberg
Date : Mon Mar 14 2022 06:32 pm

Hello g00r00!

I just came across an oddity when trying out the FTP server, I think  --

If I, as an s255 user, try to delete the QWK file in the root of the FTP space, I get an access denied message. :-D

However, after switching to a subdirectory (uploads) and then up again (..) and re-issuing the delete command, the delete succeeds, but appears to perform the deletion in the previous directory (uploads):

+ 2022.03.14 18:12:13  FTP > Connect on slot 1/10 (192.168.1.1)
+ 2022.03.14 18:12:13  FTP 1-HostName router.asus.com
+ 2022.03.14 18:12:13  FTP 1-Country  Unknown (-)
+ 2022.03.14 18:12:14  FTP 1-C: USER Data: Zip
+ 2022.03.14 18:12:14  FTP 1-S: 331 User name okay, need password.
+ 2022.03.14 18:12:17  FTP 1-C: PASS
+ 2022.03.14 18:12:17  FTP 1-S: 230 User logged in, proceed.
+ 2022.03.14 18:12:17  FTP 1-Logged in as Zip
+ 2022.03.14 18:12:17  FTP 1-C: SYST Data:
+ 2022.03.14 18:12:17  FTP 1-S: 215 UNIX Type: L8
+ 2022.03.14 18:12:28  FTP 1-C: DELE Data: SCBBS.qwk
+ 2022.03.14 18:12:28  FTP 1-S: 550 Access denied
+ 2022.03.14 18:12:31  FTP 1-C: CWD Data: uploads
+ 2022.03.14 18:12:31  FTP 1-S: 250 Working directory is now "/uploads"
+ 2022.03.14 18:12:31  FTP 1-Changed to uploads
+ 2022.03.14 18:12:33  FTP 1-C: CWD Data: ..
+ 2022.03.14 18:12:33  FTP 1-S: 250 Working directory is now "/"
+ 2022.03.14 18:12:33  FTP 1-Changed to /
+ 2022.03.14 18:12:35  FTP 1-C: DELE Data: SCBBS.qwk
+ 2022.03.14 18:12:35  FTP 1-Deleted: /mnt/bbs/mystic/files/local/L_UPLOADS/SCBBS.qwk
+ 2022.03.14 18:12:35  FTP 1-S: 250 Requested file action okay
+ 2022.03.14 18:12:46  FTP 1-C: QUIT Data:
+ 2022.03.14 18:12:46  FTP 1-S: 221 Goodbye
+ 2022.03.14 18:12:46  FTP 1-Connection closed

(There is no such file there, though, so no file can actually be deleted.)

The same thing appears to happen regardless of the filename:

+ 2022.03.14 18:18:12  FTP > Connect on slot 1/10 (192.168.1.1)
+ 2022.03.14 18:18:12  FTP 1-HostName router.asus.com
+ 2022.03.14 18:18:12  FTP 1-Country  Unknown (-)
+ 2022.03.14 18:18:13  FTP 1-C: USER Data: Zip
+ 2022.03.14 18:18:13  FTP 1-S: 331 User name okay, need password.
+ 2022.03.14 18:18:16  FTP 1-C: PASS
+ 2022.03.14 18:18:16  FTP 1-S: 230 User logged in, proceed.
+ 2022.03.14 18:18:16  FTP 1-Logged in as Zip
+ 2022.03.14 18:18:16  FTP 1-C: SYST Data:
+ 2022.03.14 18:18:16  FTP 1-S: 215 UNIX Type: L8
+ 2022.03.14 18:18:27  FTP 1-C: CWD Data: uploads
+ 2022.03.14 18:18:27  FTP 1-S: 250 Working directory is now "/uploads"
+ 2022.03.14 18:18:27  FTP 1-Changed to uploads
+ 2022.03.14 18:18:28  FTP 1-C: CWD Data: ..
+ 2022.03.14 18:18:28  FTP 1-S: 250 Working directory is now "/"
+ 2022.03.14 18:18:28  FTP 1-Changed to /
+ 2022.03.14 18:18:36  FTP 1-C: DELE Data: nosuchfile
+ 2022.03.14 18:18:36  FTP 1-Deleted: /mnt/bbs/mystic/files/local/L_UPLOADS/nosuchfile
+ 2022.03.14 18:18:36  FTP 1-S: 250 Requested file action okay
+ 2022.03.14 18:18:38  FTP 1-C: QUIT Data:
+ 2022.03.14 18:18:38  FTP 1-S: 221 Goodbye
+ 2022.03.14 18:18:38  FTP 1-Connection closed

But this does not happen for a less privileged user (e.g. s10):

+ 2022.03.14 18:25:06  FTP 1-Connection closed
+ 2022.03.14 18:25:06  FTP > Connect on slot 1/10 (192.168.1.1)
+ 2022.03.14 18:25:06  FTP 1-HostName router.asus.com
+ 2022.03.14 18:25:06  FTP 1-Country  Unknown (-)
+ 2022.03.14 18:25:08  FTP 1-C: USER Data: guest
+ 2022.03.14 18:25:08  FTP 1-S: 331 User name okay, need password.
+ 2022.03.14 18:25:09  FTP 1-C: PASS
+ 2022.03.14 18:25:09  FTP 1-S: 230 User logged in, proceed.
+ 2022.03.14 18:25:09  FTP 1-Logged in as guest
+ 2022.03.14 18:25:09  FTP 1-C: SYST Data:
+ 2022.03.14 18:25:09  FTP 1-S: 215 UNIX Type: L8
+ 2022.03.14 18:25:16  FTP 1-C: DELE Data: SCBBS.qwk
+ 2022.03.14 18:25:16  FTP 1-S: 550 Access denied
+ 2022.03.14 18:25:18  FTP 1-C: CWD Data: uploads
+ 2022.03.14 18:25:18  FTP 1-S: 250 Working directory is now "/uploads"
+ 2022.03.14 18:25:18  FTP 1-Changed to uploads
+ 2022.03.14 18:25:20  FTP 1-C: DELE Data: SCBBS.qwk
+ 2022.03.14 18:25:20  FTP 1-S: 550 Access denied
+ 2022.03.14 18:25:21  FTP 1-C: CWD Data: ..
+ 2022.03.14 18:25:21  FTP 1-S: 250 Working directory is now "/"
+ 2022.03.14 18:25:21  FTP 1-Changed to /
+ 2022.03.14 18:25:22  FTP 1-C: DELE Data: SCBBS.qwk
+ 2022.03.14 18:25:22  FTP 1-S: 550 Access denied
+ 2022.03.14 18:25:23  FTP 1-C: QUIT Data:
+ 2022.03.14 18:25:23  FTP 1-S: 221 Goodbye
+ 2022.03.14 18:25:23  FTP 1-Connection closed

+ 2022.03.14 18:30:33  FTP > Connect on slot 1/10 (192.168.1.1)
+ 2022.03.14 18:30:33  FTP 1-HostName router.asus.com
+ 2022.03.14 18:30:33  FTP 1-Country  Unknown (-)
+ 2022.03.14 18:30:35  FTP 1-C: USER Data: guest
+ 2022.03.14 18:30:35  FTP 1-S: 331 User name okay, need password.
+ 2022.03.14 18:30:36  FTP 1-C: PASS
+ 2022.03.14 18:30:36  FTP 1-S: 230 User logged in, proceed.
+ 2022.03.14 18:30:36  FTP 1-Logged in as guest
+ 2022.03.14 18:30:36  FTP 1-C: SYST Data:
+ 2022.03.14 18:30:36  FTP 1-S: 215 UNIX Type: L8
+ 2022.03.14 18:30:42  FTP 1-C: DELE Data: nosuchfile
+ 2022.03.14 18:30:42  FTP 1-S: 550 Access denied
+ 2022.03.14 18:30:44  FTP 1-C: CWD Data: uploads
+ 2022.03.14 18:30:44  FTP 1-S: 250 Working directory is now "/uploads"
+ 2022.03.14 18:30:44  FTP 1-Changed to uploads
+ 2022.03.14 18:30:45  FTP 1-C: DELE Data: nosuchfile
+ 2022.03.14 18:30:45  FTP 1-S: 550 Access denied
+ 2022.03.14 18:30:46  FTP 1-C: CWD Data: ..
+ 2022.03.14 18:30:46  FTP 1-S: 250 Working directory is now "/"
+ 2022.03.14 18:30:46  FTP 1-Changed to /
+ 2022.03.14 18:30:47  FTP 1-C: DELE Data: nosuchfile
+ 2022.03.14 18:30:47  FTP 1-S: 550 Access denied
+ 2022.03.14 18:30:48  FTP 1-C: QUIT Data:
+ 2022.03.14 18:30:48  FTP 1-S: 221 Goodbye
+ 2022.03.14 18:30:48  FTP 1-Connection closed

Do you know what could be causing this for the s255 user?

The FTP server has the Show QWK: Root setting.

The file base for the uploads directory has Uploads ACS: <empty>, FTP ACS:
<empty> and Sysop ACS: s255.

Thanks in advance!

Best regards
Bj”rn

--- Mystic BBS v1.12 A48 2022/03/11 (Linux/64)
 * Origin: Star Collision BBS, Uppsala, Sweden (2:201/137)

.