Internet Explorer Local Resource Access and Cross-Zone Scripting Vulnerabilities

Secunia Advisory SA11793

Description

Two vulnerabilities have been reported in Internet Explorer, which in combination with other known issues can be exploited by malicious people to compromise a user's system.

1) A variant of the "Location:" local resource access vulnerability can be exploited via a specially crafted URL in the "Location:" HTTP header to open local files.

Example:
"Location: URL:ms-its:C:\WINDOWS\Help\iexplore.chm::/iegetsrt.htm"

NOTE: The above example may cause certain AV programs, such as McAfee, to erroneously report the page as infected. McAfee has promised to update their AV program to avoid false detections.

2) A cross-zone scripting error can be exploited to execute files in the "Local Machine" security zone.

Secunia has confirmed the vulnerabilities in a fully patched system with Internet Explorer 6.0. It has been reported that the preliminary SP2 prevents exploitation by denying access.

Successful exploitation requires that a user can be tricked into following a link or view a malicious HTML document.

NOTE: The vulnerabilities are actively being exploited in the wild to install adware on users' systems.

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: Internet Explorer Local Resource Access and Cross-Zone Scripting Vulnerabilities

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