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libpng には、PNG ファイルの処理に脆弱性が存在します。 libpng には、細工された PNG ファイルを処理する際にバッファオーバーフローが発生する脆弱性が存在します。 PNG Development Group によると： Several versions of libpng through 1.4.2 (and through 1.2.43 in the older series) contain a bug whereby progressive applications such as web browsers (or the rpng2 demo app included in libpng) could receive an extra row of image data beyond the height reported in the header, potentially leading to an out-of-bounds write to memory (depending on how the application is written) and the possibility of execution of an attacker's code with the privileges of the libpng user (including remote compromise in the case of a libpng-based browser visiting a hostile web site).