The GetEXIFProperty function in magick/property.c in ImageMagick before 6.7.6-3 allows remote attackers to cause a denial of service (crash) via a zero value in the component count of an EXIF XResolution tag in a JPEG file, which triggers an out-of-bounds read. http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2012-0259
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