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CVE-2011-1345

Status Candidate

Overview

Microsoft Internet Explorer 6, 7, and 8 does not properly handle objects in memory, which allows remote attackers to execute arbitrary code by accessing an object that (1) was not properly initialized or (2) is deleted, as demonstrated by Stephen Fewer as the first of three chained vulnerabilities during a Pwn2Own competition at CanSecWest 2011, aka "Object Management Memory Corruption Vulnerability."

Related Files

Microsoft Internet Explorer Property Change Memory Corruption
Posted Apr 15, 2011
Authored by Nicolas Joly, VUPEN | Site vupen.com

The VUPEN Vulnerability Research Team discovered a critical vulnerability in Microsoft Internet Explorer. The vulnerability is caused by a use-after-free error in the "CObjectElement::OnPropertyChange()" function within the MSHTML library when handling objects, which could be exploited by remote attackers to compromise a vulnerable system by tricking a user into visiting a specially crafted web page. Versions 6, 7, and 8 are affected.

tags | advisory, remote, web
advisories | CVE-2011-1345
SHA-256 | 59606c9acd8d8332ddbbdbeff4cd06911f15ac789a3a6ee075f3c52dff906ea9
Zero Day Initiative Advisory 11-119
Posted Apr 12, 2011
Authored by Tipping Point | Site zerodayinitiative.com

Zero Day Initiative Advisory 11-119 - This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Internet Explorer. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the way Internet Explorer handles onPropertyChange function calls. When the onPropertyChange event handler is set to an object's attribute collection, it fails to keep an accurate reference counter to the event object. The effect of this can be that the program frees the event object while there are still references to it. This can result in remote code execution under the content of the current user.

tags | advisory, remote, arbitrary, code execution
advisories | CVE-2011-1345
SHA-256 | e67a52de6ec025ab20d910a5f2a4e8186c54e64c29dd8f3dec7e8bbbdd244224
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