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Vulnerability of Internet Explorer: four vulnerabilities

Synthesis of the vulnerability 

Four vulnerabilities of Internet Explorer lead to code execution.
Vulnerable software: IE.
Severity of this announce: 4/4.
Number of vulnerabilities in this bulletin: 4.
Creation date: 10/12/2008.
Références of this computer vulnerability: 958215, BID-32586, BID-32593, BID-32595, BID-32596, CERTA-2008-AVI-587, CVE-2008-4258, CVE-2008-4259, CVE-2008-4260, CVE-2008-4261, ISVA-081209.1, MS08-073, VIGILANCE-VUL-8305, ZDI-08-087.

Description of the vulnerability 

Four vulnerabilities of Internet Explorer lead to code execution.

IE does not validate the parameters of a navigation method, which corrupts the memory. [severity:4/4; BID-32596, CERTA-2008-AVI-587, CVE-2008-4258]

When WebDAV is used, IE access to a uninitialized memory area, which can contain attacker's data, and lead to code execution. [severity:4/4; BID-32586, CVE-2008-4259, ISVA-081209.1, ZDI-08-087]

IE can access to an object previously deleted, which corrupts the memory and leads to code execution. [severity:4/4; BID-32593, CVE-2008-4260]

When IE encounters unexpected data associated to a HTML tag, the memory is corrupted. [severity:4/4; BID-32595, CVE-2008-4261]
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This computer weakness note impacts software or systems such as IE.

Our Vigil@nce team determined that the severity of this security bulletin is critical.

The trust level is of type confirmed by the editor, with an origin of document.

This bulletin is about 4 vulnerabilities.

An attacker with a expert ability can exploit this weakness announce.

Solutions for this threat 

Internet Explorer: patch.
The Microsoft announce indicates patches and workarounds.
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