Juniper NetScreen Instant Virtual Extranet Buffer Overflow in 'JuniperSetup.ocx' ActiveX Control Lets Remote Users Execute Arbitrary Code
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SecurityTracker Alert ID: 1016000
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SecurityTracker URL: http://securitytracker.com/id?1016000
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CVE Reference: GENERIC-MAP-NOMATCH
(Links to External Site)
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Date: Apr 26 2006
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Impact: Execution of arbitrary code via network, User access via network
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Fix Available: Yes
Vendor Confirmed: Yes
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Advisory: eEye Digital Security
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Version(s): 1.x to 5.x
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Description: A vulnerability was reported in the Juniper NetScreen Instant Virtual Extranet (IVE) client. A remote user can cause arbitrary code to be executed on the target user's system.
The 'JuniperSetup.ocx' ActiveX control contains a buffer overflow in 'JuniperSetupDLL.dll' in the processing of the 'ProductName'
parameter.
A remote user can create specially crafted HTML that, when loaded by the target user, will trigger a stack overflow
and execute arbitrary code on the target user's system.
The vendor was notified on February 27, 2006.
Yuji Ukai from eEye
Digital Security discovered this vulnerability.
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Impact: A remote user can execute arbitrary code on the target system.
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Solution: The vendor has issued the following fixed versions:
* 5.3r2.1
* 5.2r4.1
* 5.1r8
* 5.0r6.1
* 4.2r8.1
The vendor's advisory is available at:
http://www.juniper.net/support/security/alerts/PSN-2006-03-013.txt
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Vendor URL: www.juniper.net/support/security/alerts/PSN-2006-03-013.txt (Links to External Site)
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Cause: Boundary error
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Underlying OS: Windows (NT), Windows (2000), Windows (2003), Windows (XP)
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Reported By: "eEye Advisories" <Advisories@eeye.com>
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Message History:
None.
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Source Message Contents
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Date: Wed, 26 Apr 2006 12:33:35 -0700
From: "eEye Advisories" <Advisories@eeye.com>
Subject: [EEYEB-20060227] Juniper Networks SSL-VPN Client Buffer Overflow
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Juniper Networks SSL-VPN Client Buffer Overflow
Release Date:
April 25, 2006
Date Reported:
February 27, 2006
Patch Development Time (In Days):
57 Days
Severity:
High (Remote Code Execution)
Vendor:
Juniper Networks
Software Affected:
Juniper SSL-VPN JuniperSetup Control
Operating Systems Affected:
Windows NT 4.0 (All versions)
Windows 2000 (All versions)
Windows XP (All versions)
Windows 2003 (All versions)
Overview:
eEye Digital Security has discovered a critical vulnerability in Juniper
Networks SSL-VPN Client ActiveX Control. JuniperSetup.ocx ActiveX
control is automatically loaded throgh the web interface of Juniper
Networks SSL-VPN. There is an exploitable buffer overflow in the
handling a parameter of ActiveX control that will allow a remote
attacker to reliably overwrite the stack with arbitrary data and execute
arbitrary code though the web browser.
Technical Details:
The vulnerability exists in JuniperSetupDLL.dll which is loaded from
JuniperSetup.ocx ActiveX control. If the long string is specified in the
ProductName parameter as follows, the stack based buffer overflow
happens in a function of JuniperSetupDLL.dll.
The vulnerable function is as follows.
.text:04F15783 ; int __stdcall sub_4F15783_ilvdlp(char
*szProductName,LPCSTR lpValueName,LPBYTE lpData,LPDWORD lpcbData)
.text:04F15783 sub_4F15783_ilvdlp proc near
.text:04F15783
.text:04F15783 SubKey = byte ptr -10Ch
.text:04F15783 Type = dword ptr -8
.text:04F15783 hKey = dword ptr -4
...
.text:04F157BF lea eax, [ebp+SubKey]
.text:04F157C5 push offset szUninstallRegistryKey
.text:04F157CA push eax
.text:04F157CB call strcpy
.text:04F157D0 push [ebp+szProductName]
.text:04F157D3 lea eax, [ebp+SubKey]
.text:04F157D9 push eax
.text:04F157DA call strcat
.data:04F1EA10 ; char szUninstallRegistryKey[]
.data:04F1EA10 szUninstallRegistryKey db
'SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\',0
The first argument (szProductName) of this function is the product name
which is used to create the uninstall registry key. The value field of
"ProductName" parameter is passed into the szProductName, copied into
the local buffer "SubKey" using strcat() function without any boundary
checking. So, if we pass the specially crafted "ProductName" parameter,
we can overwrite the return address in the stack and execute arbitrary
code. This is straight classical stack based buffer overflow
vulnerability.
Protection:
Retina Network Security Scanner has been updated to identify this
vulnerability.
Blink - Endpoint Vulnerability Prevention - preemptively protects from
this vulnerability.
Vendor Status:
Juniper Networks has released an alert (PSN-2006-03-013) and patch to
address this vulnerability.
Credit:
Discovery: Yuji Ukai
Greetings:
SCS guys, they are rock !
Copyright (c) 1998-2006 eEye Digital Security
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