Function iconv_mime_decode_headers in PHP may perform out-of-buffer read due to integer overflow when parsing MIME headers. This may lead to information disclosure or crash.When using gdImageCreateFromXbm function of PHP gd extension, it is possible to supply data that will cause the function to use the value of uninitialized variable. This may lead to disclosing contents of the stack that has been left there by previous code. When PHP EXIF extension is parsing EXIF information from an image, e.g. via exif_read_data function, in PHP it is possible to supply it with data what will cause it to read past the allocated buffer. This may lead to information disclosure or crash