Title: Buffalo TeraStation TS-Series multiple vulnerabilities Version affected: firmware version <= 1.5.7 Vendor: http://www.buffalotech.com/products/network-storage Discovered by: Andrea Fabrizi Email: email@example.com Web: http://www.andreafabrizi.it Twitter: @andreaf83 Status: unpatched
Buffalo's TeraStation network attached storage (NAS) solutions offer centralized storage and backup for home, small office and business needs.
The firmware is based on Linux ARM and most of the internal software is written using Perl.
The vulnerabilities that I found allows any unauthenticated attacker to access arbitrary files on the NAS filesystem and execute system commands with root privileges.
Tested successfully on TS-XL, TS-RXL, TS-WXL, TS-HTGL/R5, TS-XEL with the latest firmware installed (v1.57). Surely other versions with the same firmware are vulnerable.
1]======== sync.cgi unauthenticated arbitrary file download ======== Requesting an unprotected cgi, it's possible, for an unauthenticated user, to download any system file, included /etc/shadow, that contains the password shadows for the application/system users.
Moreover, using the key "all" it's possible to download the entire /var/log directory:
2]======== dynamic.pl NTP command injection ======== This vulnerability allows authenticated users to execute arbitrary commands on the system with root privileges.
This is a sample request:
POST /dynamic.pl HTTP/1.1 Content-Length: 89 Cookie: webui_session_admin=xxxxxxxxxxxxxxxxxxxxxx_en_0
bufaction=setDTSettings&dateMethod=on &ip=www.google.it%26%26[COMMAND]>/tmp/output &syncFreq=1d
It's possible to view the command output using the previous vulnerability (reading the /tmp/output file).