[CTF] Google CTF 2025 - webz : Exploiting zlib's Huffman Code Table

1. Overview2. Background 2-1. google-zlib-Increase-Huffman-Table-Size.patch 2-2. Deflate Algorithm 2-2-1. LZ77 2-2-2. Huffman Coding3. Code Analysis 3-1. Inflate 3-2. Huffman Table 3-3. Decode4. Vulnerability 4-1. Unintialized Huffman Code Table 4-2. Exploiting inflate_fast 4-2-1. Integer Overflow (Unexploitable) 4-2-2. PoC 4-2-3. Stream Overflow (Exploitable) 4-2-4. PoC5. E..

2025.08.26