Microsoft Internet Explorer onUnload handler denial of service

ie-onunload-dos (32647)

Low Risk

Description:

Microsoft Internet Explorer is vulnerable to a denial of service, caused by improper handling of JavaScript onUnload handlers. A remote attacker could exploit this vulnerability by creating a specially-crafted Web page to cause the browser to hang, if the attacker could persuade the victim to visit the malicious site.

*CVSS:

Base Score:	2.8
Access Vector:	Remote
Access Complexity:	High
Authentication:	Not Required
Confidentiality Impact:	None
Integrity Impact:	None
Availability Impact:	Partial
Temporal Score:	2.4
Exploitability:	Unproven
Remediation Level:	Unavailable
Report Confidence:	Confirmed

Consequences:

Denial of Service

Remedy:

No remedy available as of February 6, 2010.

References:

• Full-Disclosure Mailing List, Thu Feb 22 2007 - 19:29:00 CST: MSIE7 browser entrapment vulnerability (probably Firefox, too).
• Microsoft Internet Explorer Web site: Internet Explorer: Home Page.
• BID-22678: Microsoft Internet Explorer OnUnload Null Pointer Dereference Vulnerability
• CVE-2007-1094: Microsoft Internet Explorer 7 allows remote attackers to cause a denial of service (NULL dereference and application crash) via JavaScript onUnload handlers that modify the structure of a document.

Platforms Affected:

• Microsoft Internet Explorer 7

Reported:

Feb 23, 2007

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For corrections or additions please email xforce@iss.net

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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

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