Applications using libpng that install unknown chunk handlers, or copy unknown chunks, may be vulnerable to a security issue which may result in incorrect output, information leaks, crashes, or arbitrary code execution. The libpng project indicates libpng-1.0.6 through 1.0.32, libpng-1.2.0 through 1.2.26, and libpng-1.4.0beta01 through libpng-1.4.0beta19 built with PNG_READ_UNKNOWN_CHUNKS_SUPPORTED or PNG_READ_USER_CHUNKS_SUPPORTED (default configuration) are affected.
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