Stefan Esser reported this to vendor-sec
 ext/exif/exif.c - exif_read_data() overflow on long sectionname
Imagefile containing malicious exif data can trigger stack overflow.
Credits: Ilia Alshanetsky
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.