Points: 150
Spot the puppy accidentally destroyed his Puppy Linux image and now he can't boot. He needs you to save his files!
fossapup64-9.5.iso
Trying to mount the ISO file gives an error. Let's check if it's even an ISO file:
$ file fossapup64-9.5.iso
fossapup64-9.5.iso: RAR archive data, v5
Well, let's extract it then.
$ unrar l fossapup64-9.5.so
UNRAR 6.00 freeware Copyright (c) 1993-2020 Alexander Roshal
Archive: fossapup64-9.5.iso
Details: RAR 5
Attributes Size Date Time Name
----------- --------- ---------- ----- ----
..A.... 24576 2019-11-17 15:59 isolinux.bin
..A.... 136105984 2020-07-26 08:30 puppy_fossapup64_9.5.sfs
..A.... 13808 2020-09-17 06:13 README.txt
..A.... 6575264 2020-07-26 08:28 vmlinuz
..A.... 27963392 2020-07-26 08:32 zdrv_fossapup64_9.5.sfs
..A.... 2048 2020-09-17 06:15 boot/boot.catalog
..A.... 9437184 2019-11-25 11:55 boot/efi.img
..A.... 5004 2019-06-25 05:11 boot/grub/font.pf2
..A.... 331557 2019-10-27 21:36 boot/grub/grldr
..A.... 1598 2020-09-17 06:15 boot/grub/grub.cfg
..A.... 1223 2020-09-17 06:15 boot/grub/loopback.cfg
..A.... 1973 2020-09-17 06:15 boot/grub/menu.lst
..A.... 3380 2020-09-17 06:15 boot/grub/menu_phelp.lst
..A.... 38568 2019-10-27 14:43 boot/isolinux/chain.c32
..A.... 21792 2019-08-10 15:12 boot/isolinux/isohybrid
..A.... 14184 2019-08-19 09:53 boot/isolinux/isohybrid.pl
..A.... 22856 2019-08-19 09:53 boot/isolinux/isohybrid64
..A.... 24576 2019-10-27 14:43 boot/isolinux/isolinux.bin
..A.... 93 2019-10-29 05:57 boot/isolinux/isolinux.cfg
..A.... 358952 2020-06-23 07:33 boot/splash.jpg
..A.... 541649 2020-09-17 06:15 boot/splash.png
..A.... 1691 2019-11-02 12:05 Windows_Installer/readme.html
..A.... 1292 2019-11-02 12:05 Windows_Installer/readme.txt
..A.... 239190016 2020-09-17 06:15 adrv_fossapup64_9.5.sfs
..A.... 41168896 2020-09-17 06:15 fdrv_fossapup64_9.5.sfs
..A.... 1598 2020-09-17 06:15 grub.cfg
..A.... 1372644 2020-09-17 06:13 initrd.gz
...D... 0 2020-09-17 06:15 boot/grub
...D... 0 2019-11-17 16:17 boot/isolinux
...D... 0 2020-09-17 06:15 boot
...D... 0 2020-11-07 18:31 Windows_Installer
----------- --------- ---------- ----- ----
463225798 31
The .sfs files are squashfs filesystem images.
One of them probably has the flag.
Spoiler: only one of them has stuff we care about in it.
Now, we can mount puppy_fossapup64_9.5.sfs:
$ sudo mount puppy_fossapup64_9.5.sfs /mnt/test -t squashfs
Inside here, we find /home/spot/README.txt:
"spot" is a restricted user of Puppy.
(you could also add finn, rover, rex!)
/home/spot is spot's home directory.
To change from root to user spot, type this:
# su spot
# cd ~
Or, do this:
# su --login spot
Note that spot has been setup to not require a password.
You can confirm that you are indeed now spot:
# whoami
When you have finished being spot, type this:
# exit
-------------------------
User "spot" is currently used in Puppy by DidiWiki.
See the script /usr/sbin/didiwiki-gui, which is run from
the window manager menu, in "Information managers" submenu.
uwctf{puppiesarecute_690b5d89d409ffcb}
uwctf{puppiesarecute_690b5d89d409ffcb}