Ultra Crypto Component CryptoX.dll ActiveX Control Multiple Remote Buffer Overflow Vulnerabilities

Bugtraq ID:	25609
Class:	Boundary Condition Error
CVE:	CVE-2007-4903
Remote:	Yes
Local:	No
Published:	Sep 10 2007 12:00AM
Updated:	May 07 2015 05:35PM
Credit:	shinnai is credited with the discovery of these vulnerabilities.
Vulnerable:	Ultra Shareware Ultra Crypto Component 0
Not Vulnerable:

Ultra Crypto Component CryptoX.dll ActiveX Control Multiple Remote Buffer Overflow Vulnerabilities

Ultra Crypto Component ActiveX control is prone to multiple buffer-overflow vulnerabilities because it fails to perform adequate boundary checks on user-supplied data.

Successfully exploiting these issues allows remote attackers to execute arbitrary code in the context of the application using the ActiveX control (typically Internet Explorer). Failed exploit attempts likely result in denial-of-service conditions.

Ultra Crypto Component CryptoX.dll ActiveX Control Multiple Remote Buffer Overflow Vulnerabilities

UPDATE (September 23, 2008): Symantec has detected active attempts to exploit the 'AcquireContext()' method.

The following exploit is available:

• /data/vulnerabilities/exploits/25609.html

Ultra Crypto Component CryptoX.dll ActiveX Control Multiple Remote Buffer Overflow Vulnerabilities

Solution:
Currently we are not aware of any vendor-supplied patches for this issue. If you feel we are in error or if you are aware of more recent information, please mail us at: [email protected].

Ultra Crypto Component CryptoX.dll ActiveX Control Multiple Remote Buffer Overflow Vulnerabilities

References:

• Microsoft Knowledge Base Article 240797 (Microsoft)
  
• Ultra Crypto Component Homepage (Ultra Shareware)