Vulnerability Note VU#474433

Oracle JInitiator ActiveX control stack buffer overflows

Overview

The Oracle JInitiator ActiveX control contains multiple stack buffer overflows, which could allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable system.

I. Description

Oracle JInitiator allows users to run Oracle Developer Server applications within a web browser. Oracle JInitiator includes an ActiveX control called beans.ocx. The Oracle JInitiator ActiveX control is vulnerable to multiple stack buffer overflows in initialization parameters.

This vulnerability appears to be present in versions 1.1.8.x of the Oracle JInitiator software. In our testing, the 1.3.1.x versions of JInitiator do not contain these buffer overflows. However, installing a later version of the software will not remove the vulnerable version of the control.

II. Impact

A remote, unauthenticated attacker may be able to execute arbitrary code on a vulnerable system with privileges of the user.

III. Solution

We are currently unaware of a practical solution to this problem. Please consider the following workarounds

Disable the Oracle JInitiator ActiveX controls in Internet Explorer

The vulnerable ActiveX controls can be disabled in Internet Explorer by setting the kill bit for the following CLSIDs:

{A2001DD0-C7BD-11D4-A3E1-00C04FA32518}
{FF348B6E-FD21-11D4-A3F0-00C04FA32518}
{689FF870-2AC0-11D5-B634-00C04FAEDB18}
{86ECB6A0-400A-11D5-B638-00C04FAEDB18}
{ED54A7B0-6C1C-11D5-B63D-00C04FAEDB18}
{0A454840-7232-11D5-B63D-00C04FAEDB18}
{9B935470-AD4A-11D5-B63E-00C04FAEDB18}
{1D2A8890-3083-11D6-B649-00C04FAEDB18}
{5E2A3510-4371-11D6-B64C-00C04FAEDB18}
{E2258010-B53C-11D6-B64D-00C04FAEDB18}
{B5859259-C40B-4B2A-AF9D-3BF0F634B1D5}
{332BD5A0-8000-11D7-B657-00C04FAEDB18}
{B13D8B3E-04A8-406F-BD35-07530D4A62DC}
{E79BC654-8FC6-4BB9-BFB8-8860779AE213}
{7C2C94F0-7991-42B4-8D5F-4CB15B490657}

More information about how to set the kill bit is available in Microsoft Support Document 240797. Alternatively, the following text can be saved as a .REG file and imported to set the kill bit for this control:

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINESoftwareMicrosoftInternet ExplorerActiveX Compatibility{A2001DD0-C7BD-11D4-A3E1-00C04FA32518}]
"Compatibility Flags"=dword:00000400

[HKEY_LOCAL_MACHINESoftwareMicrosoftInternet ExplorerActiveX Compatibility{FF348B6E-FD21-11D4-A3F0-00C04FA32518}]
"Compatibility Flags"=dword:00000400

[HKEY_LOCAL_MACHINESoftwareMicrosoftInternet ExplorerActiveX Compatibility{689FF870-2AC0-11D5-B634-00C04FAEDB18}]
"Compatibility Flags"=dword:00000400

[HKEY_LOCAL_MACHINESoftwareMicrosoftInternet ExplorerActiveX Compatibility{86ECB6A0-400A-11D5-B638-00C04FAEDB18}]
"Compatibility Flags"=dword:00000400

[HKEY_LOCAL_MACHINESoftwareMicrosoftInternet ExplorerActiveX Compatibility{ED54A7B0-6C1C-11D5-B63D-00C04FAEDB18}]
"Compatibility Flags"=dword:00000400

[HKEY_LOCAL_MACHINESoftwareMicrosoftInternet ExplorerActiveX Compatibility{0A454840-7232-11D5-B63D-00C04FAEDB18}]
"Compatibility Flags"=dword:00000400

[HKEY_LOCAL_MACHINESoftwareMicrosoftInternet ExplorerActiveX Compatibility{9B935470-AD4A-11D5-B63E-00C04FAEDB18}]
"Compatibility Flags"=dword:00000400

[HKEY_LOCAL_MACHINESoftwareMicrosoftInternet ExplorerActiveX Compatibility{1D2A8890-3083-11D6-B649-00C04FAEDB18}]
"Compatibility Flags"=dword:00000400

[HKEY_LOCAL_MACHINESoftwareMicrosoftInternet ExplorerActiveX Compatibility{5E2A3510-4371-11D6-B64C-00C04FAEDB18}]
"Compatibility Flags"=dword:00000400

[HKEY_LOCAL_MACHINESoftwareMicrosoftInternet ExplorerActiveX Compatibility{E2258010-B53C-11D6-B64D-00C04FAEDB18}]
"Compatibility Flags"=dword:00000400

[HKEY_LOCAL_MACHINESoftwareMicrosoftInternet ExplorerActiveX Compatibility{B5859259-C40B-4B2A-AF9D-3BF0F634B1D5}]
"Compatibility Flags"=dword:00000400

[HKEY_LOCAL_MACHINESoftwareMicrosoftInternet ExplorerActiveX Compatibility{332BD5A0-8000-11D7-B657-00C04FAEDB18}]
"Compatibility Flags"=dword:00000400

[HKEY_LOCAL_MACHINESoftwareMicrosoftInternet ExplorerActiveX Compatibility{B13D8B3E-04A8-406F-BD35-07530D4A62DC}]
"Compatibility Flags"=dword:00000400

[HKEY_LOCAL_MACHINESoftwareMicrosoftInternet ExplorerActiveX Compatibility{E79BC654-8FC6-4BB9-BFB8-8860779AE213}]
"Compatibility Flags"=dword:00000400

[HKEY_LOCAL_MACHINESoftwareMicrosoftInternet ExplorerActiveX Compatibility{7C2C94F0-7991-42B4-8D5F-4CB15B490657}]
"Compatibility Flags"=dword:00000400

Disable ActiveX

Disabling ActiveX controls in the Internet Zone (or any zone used by an attacker) appears to prevent exploitation of this and other ActiveX vulnerabilities. Instructions for disabling ActiveX in the Internet Zone can be found in the "Securing Your Web Browser" document.

Systems Affected

Vendor	Status	Date Updated
Oracle Corporation	Vulnerable	27-Aug-2007

References

http://www.cert.org/tech_tips/securing_browser/#Internet_Explorer
http://www.oracle.com/technology/software/products/developer/files/11816/readme.htm
http://www.oracle.com/technology/software/products/developer/htdocs/jinit.htm
http://www.integrigy.com/security-resources/analysis/integrigy-oracle-jinitiator-vulnerability.pdf/view
http://www.securityfocus.com/bid/25473
http://secunia.com/advisories/26644/

Credit

This vulnerability was reported by Will Dormann of the CERT/CC.

This document was written by Will Dormann. Additional information was provided by Stephen Kost of Integrigy.

Other Information

Date Public	08/28/2007
Date First Published	08/28/2007 02:28:22 PM
Date Last Updated	09/14/2007
CERT Advisory
CVE Name	CVE-2007-4467
Metric	5.89
Document Revision	15