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zdiPeter Vreugdenhil ( http://vreugdenhilresearch.nl )ZDI-10-197
HistoryOct 12, 2010 - 12:00 a.m.

Microsoft Internet Explorer Stylesheet PrivateFind Remote Code Execution Vulnerability

2010-10-1200:00:00
Peter Vreugdenhil ( http://vreugdenhilresearch.nl )
www.zerodayinitiative.com
12

8.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

9.3 High

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:N/AC:M/Au:N/C:C/I:C/A:C

0.881 High

EPSS

Percentile

98.6%

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Microsoft 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 function CAttrArray::PrivateFind as defined in mshtml.dll. If a specific property of a stylesheet object is set, the code within mshtml can be forced to free an object which is subsequently accessed later. This can be leveraged by an attacker to execute remote code under the context of the user running the browser.

8.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

9.3 High

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:N/AC:M/Au:N/C:C/I:C/A:C

0.881 High

EPSS

Percentile

98.6%