The (1) roaming_read and (2) roaming_write functions in roaming_common.c in the client in OpenSSH 5.x, 6.x, and 7.x before 7.1p2, when certain proxy and forward options are enabled, do not properly maintain connection file descriptors, which allows remote servers to cause a denial of service (heap-based buffer overflow) or possibly have unspecified other impact by requesting many forwardings.
kb.juniper.net/InfoCenter/index?page=content&id=JSA10734
lists.apple.com/archives/security-announce/2016/Mar/msg00004.html
lists.opensuse.org/opensuse-security-announce/2016-01/msg00006.html
lists.opensuse.org/opensuse-security-announce/2016-01/msg00007.html
lists.opensuse.org/opensuse-security-announce/2016-01/msg00008.html
lists.opensuse.org/opensuse-security-announce/2016-01/msg00009.html
lists.opensuse.org/opensuse-security-announce/2016-01/msg00013.html
lists.opensuse.org/opensuse-security-announce/2016-01/msg00014.html
packetstormsecurity.com/files/135273/Qualys-Security-Advisory-OpenSSH-Overflow-Leak.html
seclists.org/fulldisclosure/2016/Jan/44
www.debian.org/security/2016/dsa-3446
www.openssh.com/txt/release-7.1p2
www.openwall.com/lists/oss-security/2016/01/14/7
www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html
www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html
www.securityfocus.com/archive/1/537295/100/0/threaded
www.securityfocus.com/bid/80698
www.securitytracker.com/id/1034671
www.ubuntu.com/usn/USN-2869-1
blogs.sophos.com/2016/02/17/utm-up2date-9-354-released/
blogs.sophos.com/2016/02/29/utm-up2date-9-319-released/
bto.bluecoat.com/security-advisory/sa109
cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05247375
h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05356388
h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05385680
h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05390722
lists.fedoraproject.org/pipermail/package-announce/2016-February/176516.html
lists.fedoraproject.org/pipermail/package-announce/2016-January/176349.html
security.gentoo.org/glsa/201601-01
support.apple.com/HT206167