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Arrow  Topic :

Microsoft Internet Explorer Multiple CSS Imports Memory Corruption Vulnerability


Arrow  SecurityAlert : 1343
Arrow  CVE : CVE-2006-3451
Arrow  SecurityRisk : High  Security Risk High  (About)
Arrow  Remote Exploit : Yes
Arrow  Local Exploit : Yes
Arrow  Exploit Available : No
Arrow  Credit : Sam Thomas
Arrow  Published : 10.08.2006

Arrow  Affected Software : Internet Explorer 6 All Versions
Internet Explorer 5 SP4



Arrow  Advisory Content :  

ZDI-06-026: Microsoft Internet Explorer Multiple CSS Imports Memory
Corruption Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-06-026.html
August 8, 2006

-- CVE ID:
CVE-2006-3451

-- Affected Vendor:
Microsoft

-- Affected Products:
Internet Explorer 6 All Versions
Internet Explorer 5 SP4

-- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability since August 8, 2006 by Digital Vaccine protection
filter ID 4606. For further product information on the TippingPoint IPS:

http://www.tippingpoint.com

-- Vulnerability Details:
This vulnerability allows attackers to execute arbitrary code on
vulnerable installations of Microsoft Internet Explorer. User
interaction is required to exploit this vulnerability in that the
target must visit a malicious page.


The specific flaw exists due to improper garbage collection when
multiple "imports" are used on a "styleSheets" collection. Crafting a
long chain of CSS imports in an HTML document results in a memory
corruption eventually leading to code execution.

-- Vendor Response:
Microsoft has issued an update to correct this vulnerability. More
details can be found at:

http://www.microsoft.com/technet/security/bulletin/MS06-042.mspx

-- Disclosure Timeline:
2006.06.14 - Vulnerability reported to vendor
2006.08.08 - Digital Vaccine released to TippingPoint customers
2006.08.08 - Coordinated public release of advisory

-- Credit:
This vulnerability was discovered by Sam Thomas.

-- 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:

http://www.zerodayinitiative.com

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.





Arrow  Feedback :

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