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A use-after-free vulnerability exists in the CSharedStyleSheet::Notify function within the CSS parser (mshtml.dll) in Microsoft Internet Explorer versions 6 through 8. The vulnerability is triggered by a self-referential @import rule in a stylesheet, which can result in a dangling pointer being dereferenced after the associated memory has been freed. This allows remote attackers to execute arbitrary code or cause a denial of service (application crash) by enticing a user to visit a malicious web page.
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2 valid exploits after Mallory filtered fakes, detection scripts, and README-only repos (2 hidden).
This repository contains a single Metasploit module: 'ms11_003_ie_css_import.rb', which exploits a use-after-free vulnerability (CVE-2010-3971) in Microsoft Internet Explorer's HTML engine (mshtml.dll) when handling recursive CSS @import statements. The exploit targets Internet Explorer versions 6, 7, and 8 on Windows systems with .NET 2.0.50727 installed. It leverages heap spraying and a ROP chain using mscorie.dll to bypass DEP and ASLR protections, allowing for reliable code execution. The module is highly weaponized, supporting customizable payloads via the Metasploit framework. The attack vector is browser-based: the victim must visit a malicious web page served by the attacker, which triggers the vulnerability and executes the payload. The only fingerprintable endpoint is the use of the mscorie.dll file for exploitation. The repository is structured as a single Ruby file, following standard Metasploit module conventions, and is intended for use within the Metasploit framework.
This repository contains a C# Windows Forms application that demonstrates a hotpatch for CVE-2010-3971, a vulnerability in Microsoft Internet Explorer's mshtml.dll. The exploit uses the Deviare2 library to hook the CStyleSheet::Notify function in mshtml.dll within the iexplore.exe process. When the vulnerable function is called, the application displays a message box and halts the process, effectively preventing exploitation. The code includes logic to resolve the function's address using Microsoft's public symbol server and a local PDB cache. The repository structure is typical for a Visual Studio C# project, with source files, designer files, resources, and project configuration. This is a proof-of-concept hotpatch/hook, not a weaponized exploit, and is intended to demonstrate temporary mitigation rather than exploitation.
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