The gdImageCrop function in ext/gd/gd.c in PHP 5.5.x before 5.5.9 does
not check return values, which allows remote attackers to cause a
denial of service (application crash) or possibly have unspecified
other impact via invalid imagecrop arguments that lead to use of a
NULL pointer as a return value, a different vulnerability than
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the CVE-ID was allocated or reserved, and does not
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discovered, shared with the affected vendor, publicly
disclosed, or updated in CVE.
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