ZDI-07-048: Microsoft Internet Explorer substringData() Heap Overflow Vulnerability Aug 14 2007 08:33PM
zdi-disclosures 3com com
ZDI-07-048: Microsoft Internet Explorer substringData() Heap Overflow



August 14, 2007

-- CVE ID:



-- Affected Vendor:


-- Affected Products:

Windows 2000

Windows XP

Windows Server 2003

Windows Vista

Windows Office 2003

Visual Basic 6.0

-- TippingPoint(TM) IPS Customer Protection:

TippingPoint IPS customers have been protected against this

vulnerability since February 8, 2007 by Digital Vaccine protection

filter ID 5098. For further product information on the TippingPoint IPS:


-- Vulnerability Details:

This vulnerability allows remote attackers to execute arbitrary code on

vulnerable installations of various Microsoft software User interaction

is required to exploit this vulnerability in that the target must visit

a malicious page.

The specific flaw exists in the substringData() method available on the

TextNode JavaScript object. When specific parameters are passed to the

method, an integer overflow occurs causing incorrect memory allocation.

If this event occurs after a different ActiveX object has been

instantiated, an exploitable condition is created when the ActiveX

object is deallocated which can result in the execution of arbitrary


-- Vendor Response:

Microsoft has issued updates to correct this vulnerability. More details

can be found at:



-- Disclosure Timeline:

2006.10.03 - Vulnerability reported to vendor

2007.02.08 - Digital Vaccine released to TippingPoint customers

2007.08.14 - Coordinated public release of advisory

-- Credit:

This vulnerability was discovered by an anonymous researcher.

-- About the Zero Day Initiative (ZDI):

Established by TippingPoint, a division of 3Com, The Zero Day Initiative

(ZDI) represents a best-of-breed model for rewarding security

researchers for responsibly disclosing discovered vulnerabilities.

Researchers interested in getting paid for their security research

through the ZDI can find more information and sign-up at:


The ZDI is unique in how the acquired vulnerability information is used.

3Com does not re-sell the vulnerability details or any exploit code.

Instead, upon notifying the affected product vendor, 3Com provides its

customers with zero day protection through its intrusion prevention

technology. Explicit details regarding the specifics of the

vulnerability are not exposed to any parties until an official vendor

patch is publicly available. Furthermore, with the altruistic aim of

helping to secure a broader user base, 3Com provides this vulnerability

information confidentially to security vendors (including competitors)

who have a vulnerability protection or mitigation product.

CONFIDENTIALITY NOTICE: This e-mail message, including any attachments,
is being sent by 3Com for the sole use of the intended recipient(s) and
may contain confidential, proprietary and/or privileged information.
Any unauthorized review, use, disclosure and/or distribution by any
recipient is prohibited. If you are not the intended recipient, please
delete and/or destroy all copies of this message regardless of form and
any included attachments and notify 3Com immediately by contacting the
sender via reply e-mail or forwarding to 3Com at postmaster (at) 3com (dot) com. [email concealed]

[ reply ]


Privacy Statement
Copyright 2010, SecurityFocus