Collected research

Heap Feng Shui in JavaScript

Alexander Sotirov · blackhat.com

Alexander Sotirov's method for putting the Windows heap into a chosen state from JavaScript: BSTR string allocation, CollectGarbage(), and a plunger that flushes the OLEAUT32 cache so every alloc and free reaches the system heap. The HeapLib library defragments, seeds the free list and builds fake vtables on the lookaside, demonstrated against CVE-2006-4777.

Record

Researcher

Alexander Sotirov

Published by

blackhat.com

Format

Whitepaper

Topic

Server

In the archive

• Collected in the 2007 research round

Related sources

• bh eu 07 sotirov apr19 Whitepaper

Tags

• javascript
• rce
• activex
• javascript-runtime
• tooling
• cve
• mitigation

This page is the archive's own catalogue record. The research is the work of Alexander Sotirov, first published at the original source. Preserved copies are kept so the citation survives its host; this one was last captured on 9 August 2026.