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Internet Explorer Local Resource Access and Cross-Zone Scripting Vulnerabilities Advisory Available in Danish 

Secunia Advisory: SA11793  
Release Date: 2004-06-08
Last Update: 2004-08-02

Critical:
Extremely critical
Impact: Security Bypass
System access
Where: From remote
Solution Status: Vendor Patch

Software:Microsoft Internet Explorer 6.x

CVE reference:CVE-2004-0549 (Secunia mirror)

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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 this product installed on your home computer? Scan using the free Personal Software Inspector. Check if a vulnerable version is installed on computers in your corporate network, using the Network Software Inspector.

Solution:
This vulnerability has been fixed in a cumulative update from the vendor.

See:
SA12192

Provided and/or discovered by:
Originally discovered in the wild.
Posted to public mailing list by Rafel Ivgi.
Detailed analysis of exploit by Jelmer.

Changelog:
2004-06-08: Updated information in advisory.
2004-06-10: Updated information in advisory and added link to US-CERT vulnerability note.
2004-06-17: Added CVE reference.
2004-06-22: Updated credits section.
2004-06-30: Updated description section.
2004-08-02: Updated "Solution" section and linked to new advisory.

Other References:
SA12192:
http://secunia.com/advisories/12192/

Jelmer's posting on Full-Disclosure:
http://archives.neohapsis.com/archives/fulldisclosure/2004-06/0104.html

US-CERT VU#713878:
http://www.kb.cert.org/vuls/id/713878



Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.

Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.

127 Related Secunia Security Advisories, displaying 10

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5. Internet Explorer Data Stream Handling Vulnerability
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7. Internet Explorer "OnKeyDown" Event Focus Weakness
8. Microsoft Internet Explorer FTP Credentials Exposure
9. Microsoft Internet Explorer Multiple Vulnerabilities
10. Microsoft Windows Vector Markup Language Buffer Overflow

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