RealNetworks RealPlayer unspecified ActiveX buffer overflow

Notification Type: IBM Internet Security Systems Protection Alert
Notification Date: Oct. 19, 2007
Notification Version: 1.0
   
Name: RealNetworks RealPlayer unspecified ActiveX buffer overflow
Public disclosure/
In the wild date:		  Oct. 19, 2007
Description: An unspecified RealNetworks RealPlayer ActiveX control is vulnerable to a buffer overflow.

 

ISS Coverage
Product Content Version

Network Sensor 7.0
Proventia A
Proventia IPS (G/GX)
Server Sensor 7.0
Proventia Multifunction Appliance
Proventia Mail
Proventia Server (Linux)

XPU 1.50

XPU 24.11

Proventia Desktop 8.0.614.8
BlackICE PC Protection 3.6 eok
Propagation Techniques ISS Protection Available
remote exploit

HTML_IE_ActiveX_Loader_Heap_Corruption*

This signature requires a manual PAM tunable in order to detect and therefore block the ClassID associated with RealPlayer.  Please be warned that this will also block any legitimate usage of the ActiveX control just as setting the kill bit would, as mentioned in the workaround information below.

*pam.content.clsid.activexloaderbo.blacklist

This tuning parameter adds a user defined CLSID to a blacklist for the HTML_IE_ActiveX_Loader_Heap_Corruption signature.  The specified CLSID will be regarded as a security threat whenever it is detected. An example of proper usage is pam.content.clsid.activexloaderbo.blacklist=FDC7A535-4070-4B92-A0EA-D9994BCC0DC5.

It is also quite possible, depending on the way an exploit is crafted, that one of the below signatures would trigger and block an attack leveraging this vulnerability.

JavaScript_Shellcode_Detected
JavaScript_NOOP_Sled

  July 12, 2007

Detailed Description
Business Impact:

Gain Access

CVSS: Base Score: 9.3
  Access Vector: Remote
Access Complexity: Medium
Authentication: Not Required
Confidentiality Impact: Complete
Integrity Impact: Complete
Availability Impact: Complete
Impact Bias: Normal 
Adjusted Temporal Score: 7.5
  Exploitability: Unproven
Remediation Level: Workaround
Report Confidence: Confirmed
Affected Products: For a full list of affected software and versions, see references below.
Technical Description: An unspecified RealNetworks RealPlayer ActiveX control is vulnerable to a buffer overflow. By persuading a victim to visit a specially-crafted Web page using Microsoft Internet Explorer, a remote attacker could overflow a buffer and execute arbitrary code on the system with the privileges of the victim or cause the application to crash.
Remediation:

As a workaround, set the kill bit on the Class Identifier (CLSID) FDC7A535-4070-4B92-A0EA-D9994BCC0DC5. Refer to  Microsoft Help and Support Article ID: 240797 for information.  See References for details.

References
XFDB http://xforce.iss.net/xforce/xfdb/37280
Microsoft http://support.microsoft.com/kb/240797

Revision History

1.0

Initial publication.


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