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CVE-2010-3962

Status Candidate

Overview

Use-after-free vulnerability in Microsoft Internet Explorer 6, 7, and 8 allows remote attackers to execute arbitrary code via vectors related to Cascading Style Sheets (CSS) token sequences and the clip attribute, aka an "invalid flag reference" issue or "Uninitialized Memory Corruption Vulnerability," as exploited in the wild in November 2010.

Related Files

Internet Explorer CSS SetUserClip Memory Corruption
Posted Dec 14, 2010
Authored by Matteo Memelli, jduck, yuange1975 | Site metasploit.com

This Metasploit module exploits a memory corruption vulnerability within Microsoft's HTML engine (mshtml). When parsing an HTML page containing a specially crafted CSS tag, memory corruption occurs that can lead arbitrary code execution. It seems like Microsoft code inadvertently increments a vtable pointer to point to an unaligned address within the vtable's function pointers. This leads to the program counter being set to the address determined by the address "[vtable+0x30+1]". The particular address depends on the exact version of the mshtml library in use. Since the address depends on the version of mshtml, some versions may not be exploitable. Specifically, those ending up with a program counter value within another module, in kernel space, or just not able to be reached with various memory spraying techniques. Also, since the address is not controllable, it is unlikely to be possible to use ROP to bypass non-executable memory protections.

tags | exploit, arbitrary, kernel, code execution
advisories | CVE-2010-3962, OSVDB-68987
MD5 | d8abe530c771ff9eb0b738f46b264236
iDEFENSE Security Advisory 2010-12-14.1
Posted Dec 14, 2010
Authored by Jose Antonio Vazquez Gonzalez | Site idefense.com

iDefense Security Advisory 12.14.10 - Remote exploitation of a memory corruption vulnerability in Microsoft Corp.'s Internet Explorer could allow an attacker to execute arbitrary code with the privileges of the current user. The vulnerability exists due to an uninitialized variable in the "CLayout::EnsureDispNode" method. This method is called to recalculate the location of various HTML elements within the page. This function passes a "CDispNodeInfo" object to another function, "CLayout::GetDispNodeInfo," which is supposed to initialize the object passed in; however, the function fails to properly initialize a flag's value that is used later to determine how many "extra" bytes to allocate for a heap buffer. This eventually leads to an undersized buffer being allocated to hold a "CDispClipNode" object in the "CLayout::EnsureDispNodeCore" function. The vulnerability manifests itself when the "CDispNode::SetUserClip" function attempts to use the invalid "extra size" to calculate an offset into the object and manipulate a bit at this location. This corrupts the objects VTABLE by setting the second bit to 1, which can lead to the execution of arbitrary code when this pointer is accessed later. Microsoft Internet Explorer 6, 7 and 8 are vulnerable.

tags | advisory, remote, arbitrary
advisories | CVE-2010-3962
MD5 | ff4fcb727d31ed3a0610852f475e7e54
Internet Explorer CSS Tags Memory Corruption
Posted Nov 5, 2010
Authored by Matteo Memelli, jduck, yuange1975 | Site metasploit.com

This Metasploit module exploits a memory corruption vulnerability within Microsoft's HTML engine (mshtml). When parsing an HTML page containing a specially crafted CSS tag, memory corruption occurs that can lead arbitrary code execution.

tags | exploit, arbitrary, code execution
advisories | CVE-2010-3962
MD5 | a6e5a8e7e349e8c1d163c11cab6e7354
Microsoft Internet Explorer 6 / 7 / 8 Memory Corruption
Posted Nov 5, 2010
Authored by Matteo Memelli

Microsoft Internet Explorer versions 6, 7 and 8 memory corruption exploit.

tags | exploit
advisories | CVE-2010-3962
MD5 | c0d7b7b1f0ae356bc5698b97fcf5122b
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