Provide references for CVE-2016-4009.
Where can I find more information about CVE-2016-4009?
References are available at: https://security.gentoo.org/glsa/201612-52, https://github.com/python-pillow/Pillow/pull/1714, https://github.com/python-pillow/Pillow/commit/4e0d9b0b9740d258ade40cce248c93777362ac1e, http://www.securityfocus.com/bid/86064, https://github.com/python-pillow/Pillow/blob/c3cb690fed5d4bf0c45576759de55d054916c165/CHANGES.rst.