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K
zdiRob KingZDI-11-140
HistoryApr 19, 2011 - 12:00 a.m.

Webkit Detached Body Element Remote Code Execution Vulnerability

2011-04-1900:00:00
Rob King
www.zerodayinitiative.com
14

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

0.23 Low

EPSS

Percentile

96.4%

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Apple Safari WebKit. 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 how the application manages a reference to an anonymous block located near a particular element within the document. When cloning this element, the application will duplicate a reference to the block and then later re-attach this element to the rendering tree. During this process the library will free the original rendering element. Subsequent access to the same element will then cause the library to use the freed object. This can be utilized to achieve code execution under the context of the application.

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

0.23 Low

EPSS

Percentile

96.4%