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zdiSam Thomas of eshu.co.ukZDI-10-012
HistoryJan 21, 2010 - 12:00 a.m.

Microsoft Internet Explorer Baseline Tag Rendering Remote Code Execution Vulnerability

2010-01-2100:00:00
Sam Thomas of eshu.co.uk
www.zerodayinitiative.com
19

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

0.944 High

EPSS

Percentile

99.2%

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 an attacker must coerce a victim to visit a malicious page. The specific flaw exists due to the application rendering intertwined strike and center tags containing an element that manipulates the font baseline such as ‘sub’ or ‘sup’. When this element pointer is removed the application will later dereference it even though it has been freed. Successful exploitation can lead to arbitrary code execution under the context of the currently logged in user.

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

0.944 High

EPSS

Percentile

99.2%