Internet Explorer File Download Handling Memory Corruption
Secunia Advisory: SA23469
Release Date: 2007-10-09
Popularity: 15,167 views

Critical:
Highly critical
Impact: System access
Where: From remote
Solution Status: Vendor Patch

Software:Microsoft Internet Explorer 5.01
Microsoft Internet Explorer 6.x
Microsoft Internet Explorer 7.x

Binary Analysis: BA96 :: Available for Credits

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CVE reference:CVE-2007-3893


Description:
Secunia Research has discovered a vulnerability in Internet Explorer, which can be exploited by malicious people to compromise a user's system.

The vulnerability is caused due to an error in the file download queue handling when processing multiple concurrent attempts to start a file download. This can be exploited via a specially crafted web page to corrupt memory in a way that results in use of an already freed object.

Successful exploitation allows execution of arbitrary code.

Solution:
Apply patches.

Windows 2000 SP4 and Internet Explorer 5.01 SP4:
http://www.microsoft.com/downloads/de...=95827F3F-A984-4E34-A949-D16A0614121A

Windows 2000 SP4 and Internet Explorer 6 SP1:
http://www.microsoft.com/downloads/de...=DF3BA596-7C5B-4151-9884-6957AA884AAB

Windows XP SP2 and Internet Explorer 6:
http://www.microsoft.com/downloads/de...=513A8320-6D36-4FC9-A38A-867192B55B53

Windows XP Professional x64 Edition (optionally with SP2) and Internet Explorer 6:
http://www.microsoft.com/downloads/de...=AE8A26D8-1910-4B8C-8A73-6E2FA6B5B29F

Windows Server 2003 SP1/SP2 and Internet Explorer 6:
http://www.microsoft.com/downloads/de...=4AEFAA38-8757-4E6E-8924-57CABD1C2FC3

Windows Server 2003 x64 Edition (optionally with SP2) and Internet Explorer 6:
http://www.microsoft.com/downloads/de...=88ABA9DD-653B-4CDF-A513-CCA32A7D7E41

Windows Server 2003 with SP1/SP2 for Itanium-based systems and Internet Explorer 6:
http://www.microsoft.com/downloads/de...=309A8F10-C7EA-4961-A969-092B0C4D7BBC

Windows XP SP2 and Internet Explorer 7:
http://www.microsoft.com/downloads/de...=4CA0AC93-BF51-40FE-A1BA-CB3E0A36D8B5

Windows XP Professional x64 Edition (optionally with SP2) and Internet Explorer 7:
http://www.microsoft.com/downloads/de...=DBD284D0-2664-42A4-AD16-A0535244C81C

Windows Server 2003 SP1/SP2 and Internet Explorer 7:
http://www.microsoft.com/downloads/de...=0A31C451-32F4-4551-AE45-D600F8B3B11B

Windows Server 2003 x64 Edition (optionally with SP2) and Internet Explorer 7:
http://www.microsoft.com/downloads/de...=C1915633-D181-4CA1-A4F0-7CA0F865AA72

Windows Server 2003 with SP1/SP2 for Itanium-based systems and Internet Explorer 7:
http://www.microsoft.com/downloads/de...=093A2250-3BE3-494F-80E0-89CA7217030F

Windows Vista and Internet Explorer 7:
http://www.microsoft.com/downloads/de...=86392E8D-098C-427F-A233-699CDB9375AE

Windows Vista x64 Edition and Internet Explorer 7:
http://www.microsoft.com/downloads/de...=62490E6D-0A21-4A15-90BD-63CA8F8886B6

Provided and/or discovered by:
Carsten Eiram, Secunia Research.

Original Advisory:
MS07-057 (KB939653):
http://www.microsoft.com/technet/security/Bulletin/MS07-057.mspx

Secunia Research:
http://secunia.com/secunia_research/2007-31/


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