PicoCTF - advanced-potion-making

tags: PicoCTF CTF Misc

Challenge: advanced-potion-making

Background

PNG文件格式详解 隐写分析(2) PNG图片隐写

Exploit - Recover + StegSolve

Modify the file signature and length to the right value. 89 50 42 11 0D 0A 1A 0A 00 12 13 14 49 48 44 52 $\to$ 89 50 4E 47 0D 0A 1A 0A 00 00 00 0D 49 48 44 52

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Reference