The mconvert function in softmagic.c in file before 5.21, as used in the Fileinfo component in PHP before 5.4.37, 5.5.x before 5.5.21, and 5.6.x before 5.6.5, does not properly handle a certain string-length field during a copy of a truncated version of a Pascal string, which might allow remote attackers to cause a denial of service (out-of-bounds memory access and application crash) via a crafted file.
https://support.apple.com/HT205267
https://security.gentoo.org/glsa/201701-42
https://github.com/file/file/commit/59e63838913eee47f5c120a6c53d4565af638158
https://bugs.php.net/patch-display.php?bug=68735&patch=bug68735.patch&revision=1420309079
https://bugs.php.net/bug.php?id=68735
http://www.securityfocus.com/bid/72505
http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html
http://www.oracle.com/technetwork/topics/security/bulletinjul2015-2511963.html
http://rhn.redhat.com/errata/RHSA-2015-1135.html
http://rhn.redhat.com/errata/RHSA-2015-1066.html
http://rhn.redhat.com/errata/RHSA-2015-1053.html
http://php.net/ChangeLog-5.php
http://openwall.com/lists/oss-security/2015/02/05/12
http://marc.info/?l=bugtraq&m=144050155601375&w=2
http://marc.info/?l=bugtraq&m=143748090628601&w=2
http://lists.opensuse.org/opensuse-security-announce/2015-03/msg00004.html
http://lists.opensuse.org/opensuse-security-announce/2015-03/msg00003.html
http://lists.opensuse.org/opensuse-security-announce/2015-03/msg00002.html
http://lists.apple.com/archives/security-announce/2015/Sep/msg00008.html