The exif_process_unicode function in ext/exif/exif.c in PHP before 5.4.37, 5.5.x before 5.5.21, and 5.6.x before 5.6.5 allows remote attackers to execute arbitrary code or cause a denial of service (uninitialized pointer free and application crash) via crafted EXIF data in a JPEG image.<a href=http://cwe.mitre.org/data/definitions/824.html>CWE-824: Access of Uninitialized Pointer</a> http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-0232
