General discussion

VULNERABILITIES - July 3, 2006

Remote access to Novell GroupWise emails

Madrid, July 3 2006 - A vulnerability has been reported in Novell
GroupWise that could allow an authenticated remote user to access
another user's email messages.

The problem is caused through an error within the GroupWise Windows
client API, and could let authenticated remote users access random email
messages of users of the same mail server.

Novell has published security updates to fix this vulnerability:

- For GroupWise 6.5:
http://support.novell.com/filefinder/16963/index.html
- For GroupWise 7: http://support.novell.com/filefinder/20641/index.html

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Linux Kernel SCTP Denial of Service Vulnerability

SECUNIA ADVISORY ID:
SA20917

VERIFY ADVISORY:
http://secunia.com/advisories/20917/

CRITICAL:
Moderately critical

IMPACT:
DoS

WHERE:
From remote

OPERATING SYSTEM:
Linux Kernel 2.6.x
http://secunia.com/product/2719/

DESCRIPTION:
A vulnerability has been reported in the Linux Kernel, which can be
exploited by malicious people to cause a DoS (Denial of Service).

The vulnerability is caused due to an error when handling SCTP
packets without a chunk. This can be exploited to crash the kernel by
sending a specially crafted SCTP packet to a vulnerable system.

SOLUTION:
Update to version 2.6.16.23 or 2.6.17.3.
http://www.kernel.org

PROVIDED AND/OR DISCOVERED BY:
The vendor credits George A. Theall.

ORIGINAL ADVISORY:
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.16.23
http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.17.3

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ZoneAlarm Insufficient protection of registry key

'VETFDDNT\Enum' Vulnerability

Basic information:
Release date: July 1, 2006
Last update: July 1, 2006
Type: Implementation bugs
Character: System crash
Status: Unpatched bugs
Risk: Serious bugs
Exploitability: Locally exploitable bugs
Discoverability: Hardly discoverable bugs

Description:

ZoneAlarm insufficiently checks calling standard Windows API functions RegSaveKey, RegRestoreKey and RegDeleteKey. A proper combination of mentioned function calls on registry key 'HKLM\SYSTEM\CurrentControlSet\Services\VETFDDNT\Enum' causes a system crash due to erroneous implementation of ZoneAlarm's driver. Since version 6.5.722.000 ZoneAlarm Internet Security Suite protects this key better and thus exploitation of this bug requires two calls of mentioned functions combination. Moreover, since this version it is also necessary to alert user with a query of arbitrary protected action. The alert is not needed if ZoneAlarm operates in Game Mode. This bug is classified as serious because the protected action that has to be executed before the exploitation can be arbitrary and because the system crashes regardless the user's decision.

Vulnerable software:
ZoneAlarm Internet Security Suite 6.5.722.000
ZoneAlarm Internet Security Suite 6.1.737.000
probably all versions of ZoneAlarm Internet Security Suite

Not vulnerable software:
ZoneAlarm Pro 6.1.744.001
probably all versions of ZoneAlarm and ZoneAlarm Pro

Events:
2006-07-01: Advisory released
2006-07-01: Vendor notification

Reference:
http://www.matousec.com/info/advisories/ZoneAlarm-Insufficient-protection-of-registry-key-VETFDDNT-Enum.php via SecurityFocus Bugtraq

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Internet Explorer HTML Help Control "HHCtrl" Memory

Corruption Vulnerability

Advisory ID : FrSIRT/ADV-2006-2635
CVE ID : GENERIC-MAP-NOMATCH
Rated as : Critical
Remotely Exploitable : Yes
Locally Exploitable : Yes
Release Date : 2006-07-03

Technical Description

A vulnerability has been identified in Microsoft Internet Explorer, which could be exploited by remote attackers to crash a vulnerable browser or potentially take complete control of an affected system. This flaw is due to a memory corruption error in the HTML Help Control "HHCtrl" when processing a specially crafted property, which could be exploited by attackers to cause a denial of service or execute arbitrary commands by convincing a user to visit a specially crafted Web page.

Affected Products

Microsoft Internet Explorer 5.01 Service Pack 4 on Microsoft Windows 2000 Service Pack 4
Microsoft Internet Explorer 6 Service Pack 1 on Microsoft Windows 2000 Service Pack 4
Microsoft Internet Explorer 6 Service Pack 1 on Microsoft Windows XP Service Pack 1
Microsoft Internet Explorer 6 for Microsoft Windows XP Service Pack 2
Microsoft Internet Explorer 6 for Microsoft Windows Server 2003
Microsoft Internet Explorer 6 for Microsoft Windows Server 2003 Service Pack 1
Microsoft Internet Explorer 6 for Microsoft Windows Server 2003 (Itanium)
Microsoft Internet Explorer 6 for Microsoft Windows Server 2003 with SP1 (Itanium)
Microsoft Internet Explorer 6 for Microsoft Windows Server 2003 x64 Edition
Microsoft Internet Explorer 6 for Microsoft Windows XP Professional x64 Edition
Microsoft Internet Explorer 6 Service Pack 1 on Microsoft Windows 98
Microsoft Internet Explorer 6 Service Pack 1 on Microsoft Windows 98 SE
Microsoft Internet Explorer 6 Service Pack 1 on Microsoft Windows Millennium Edition

Solution

The FrSIRT is not aware of any official supplied patch for this issue.

References

http://www.frsirt.com/english/advisories/2006/2635
http://browserfun.blogspot.com/2006/07/mobb-2-internethhctrl-image-property.html

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Internet Explorer Data Access ActiveX Remote

Denial of Service Vulnerability

Advisory ID : FrSIRT/ADV-2006-2634
CVE ID : GENERIC-MAP-NOMATCH
Rated as : Low Risk
Remotely Exploitable : Yes
Locally Exploitable : Yes
Release Date : 2006-07-03

Technical Description

A vulnerability has been identified in Microsoft Internet Explorer, which could be exploited by attackers to cause a denial of service. This flaw is due to a NULL pointer dereference error in the Microsoft Data Access ActiveX "msado15.dll" object when handling a specially crafted property, which could be exploited by attackers to crash a vulnerable browser by tricking a user into visiting a malicious web page.

Affected Products

Microsoft Internet Explorer 5.01 Service Pack 4 on Microsoft Windows 2000 Service Pack 4
Microsoft Internet Explorer 6 Service Pack 1 on Microsoft Windows 2000 Service Pack 4
Microsoft Internet Explorer 6 Service Pack 1 on Microsoft Windows XP Service Pack 1
Microsoft Internet Explorer 6 for Microsoft Windows XP Service Pack 2
Microsoft Internet Explorer 6 for Microsoft Windows Server 2003
Microsoft Internet Explorer 6 for Microsoft Windows Server 2003 Service Pack 1
Microsoft Internet Explorer 6 for Microsoft Windows Server 2003 (Itanium)
Microsoft Internet Explorer 6 for Microsoft Windows Server 2003 with SP1 (Itanium)
Microsoft Internet Explorer 6 for Microsoft Windows Server 2003 x64 Edition
Microsoft Internet Explorer 6 for Microsoft Windows XP Professional x64 Edition
Microsoft Internet Explorer 6 Service Pack 1 on Microsoft Windows 98
Microsoft Internet Explorer 6 Service Pack 1 on Microsoft Windows 98 SE
Microsoft Internet Explorer 6 Service Pack 1 on Microsoft Windows Millennium Edition

Solution

The FrSIRT is not aware of any official supplied patch for this issue.

References

http://www.frsirt.com/english/advisories/2006/2634
http://browserfun.blogspot.com/2006/07/mobb-1-adodbrecordset-filter-property.html

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