OptiPNG v0.7.7 was discovered to contain a global buffer overflow via the ‘buffer’ variable at gifread.c.
optipng.sourceforge.net/
github.com/Frank-Z7/z-vulnerabilitys/blob/main/optipng-global-buffer-overflow1/optipng-global-buffer-overflow1.md
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sourceforge.net/projects/optipng/files/OptiPNG/optipng-0.7.7/optipng-0.7.7.tar.gz/download?use_mirror=udomain&download=