Microsoft Internet Explorer FTP Response Remote Code Execution

Notification Type: IBM Internet Security Systems Protection Alert
Notification Date: Feb 13, 2007
Notification Version: 1.2
   
Name: Microsoft Internet Explorer FTP Response Remote Code Execution
Public disclosure/
In the wild date:
Feb 13, 2007
Aliases: MS07-016
CVE: CVE-2007-0217
Description: Microsoft Internet Explorer could allow a remote attacker to execute arbitrary code on a victim's system, caused by improper handling of FTP responses by Internet Explorer's built-in FTP client.

 

ISS Coverage

Product Content Version
Network Sensor 7.0
Proventia A
Proventia IPS (G/GX) prior to Firmware Version 1.2
Server Sensor 7.0
24.56
Proventia IPS (G/GX) Firmware Version 1.2 or
later
Proventia Multifunction Appliance
Proventia Server (Linux)
1.95
Proventia Server (Windows) 1.0.914.1960
Proventia Desktop x.x.x.1960
RealSecure Desktop 7.0 (AM SP 6.73 or 7.73) EQB
BlackICE PC Protection 3.6 CQB
Propagation Techniques ISS Protection Available
remote exploit FTP_Bad_Response_Overflow Feb 15, 2007

Detailed Description

Business Impact: This bulletin covers three vulnerabilities in Microsoft Internet Explorer. The most critical problem is an FTP client vulnerability that can be exploited by a malformed response from a malicious server. It is easy to direct web browsers to an FTP URL on a malicious site, so this issue should be taken seriously. The other two issues relate to the instantiation of COM objects in IE that were not designed to be instantiated in IE, and create exploitable memory corruption when run. A denial of service POC for one of these issues was posted publicly in August, but it only impacts systems that support Kanji. Other impacted objects are more common place. IE7 provides protection from the COM object vulnerabilities by default due to a new opt-in feature for ActiveX controls.
CVSS: Base Score: 10
  Access Vector: Remote
Access Complexity: Low 
Authentication: Not Required 
Confidentiality Impact: Complete 
Integrity Impact: Complete 
Availability Impact: Complete 
Impact Bias: Normal 
Adjusted Temporal Score: 7.4 
  Exploitability: Unproven 
Remediation Level: Official Fix 
Report Confidence: Confirmed 
Affected Products:

Microsoft Windows 2000 Service Pack 4
Microsoft Windows XP Service Pack 2
Microsoft Windows XP Professional x64 Edition
Microsoft Windows Server 2003
Microsoft Windows Server 2003 Service Pack 1
Microsoft Windows Server 2003 for Itanium-based Systems
Microsoft Windows Server 2003 with SP1 for Itanium-based Systems
Microsoft Windows Server 2003 x64 Edition

Technical Description: Microsoft Internet Explorer could allow a remote attacker to execute arbitrary code on a victim's system, caused by improper handling of FTP responses by Internet Explorer's built-in FTP client. If a remote attacker could persuade a victim to visit a malicious FTP server using Internet Explorer, the attacker could exploit this vulnerability to execute arbitrary code on the system with the privileges of the victim.
Remediation instructions: Patches for these issues have been released by Microsoft.  See References for details. 

References

XFDB:  http://xforce.iss.net/xforce/xfdb/32100
Microsoft: http://www.microsoft.com/technet/security/Bulletin/ms07-016.mspx

Revision History

1.0 Initial alert.
1.1 Added remediation information and brief description.
1.2 Updated signature date.


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