Internet Explorer "onunload" Event Spoofing Vulnerability - Secunia Advisories - Vulnerability Intelligence

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Internet Explorer "onunload" Event Spoofing Vulnerability
Secunia Advisory:	SA23014	Advisory Toolbox: Issue ticket Save in to-do list Mark as handled Exploit information Download as PDF Review actions Add comment
Release Date:	2007-02-23
Last Update:	2007-10-09
Popularity:	23,166 views

Critical:	Less critical
Impact:	Spoofing
Where:	From remote
Solution Status:	Vendor Patch

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

Subscribe:	Instant alerts on relevant vulnerabilities

CVE reference:	CVE-2007-1091

Description: Secunia Research has discovered a vulnerability in Internet Explorer, which can be exploited by a malicious website to spoof the address bar. The vulnerability is caused due to an error in Internet Explorer's handling of "onunload" events, enabling a malicious website to abort the loading of a new website. This can be exploited to spoof the address bar if e.g. the user enters a new website manually in the address bar, which is commonly exercised as best practice. The vulnerability is confirmed on a fully patched Windows XP SP2 system running Internet Explorer 7 or Internet Explorer 6. Other versions may also be affected. 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: Originally discovered by: * Jakob Balle, Secunia Research Independently discovered and publicly disclosed by: * Michal Zalewski Changelog: 2007-03-02: Added CVE reference. Added information about Internet Explorer 6. 2007-10-09: Updated "Solution" section. Added link to Microsoft security bulletin. Original Advisory: MS07-057 (KB939653): http://www.microsoft.com/technet/security/Bulletin/MS07-057.mspx Secunia Research: http://secunia.com/secunia_research/2007-1/ Other References: Michal Zalewski: http://lists.grok.org.uk/pipermail/full-disclosure/2007-February/052630.html

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