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Vulnerability of OpenSSH: NULL pointer dereference via a NEWKEYS message

Synthesis of the vulnerability 

An attacker can force a NULL pointer to be dereferenced in OpenSSH via an out of order NEWKEYS message, in order to trigger a denial of service.
Impacted products: Blue Coat CAS, ProxySG par Blue Coat, SGOS by Blue Coat, Broadcom Content Analysis, ProxySG by Symantec, SGOS by Symantec, Debian, BIG-IP Hardware, TMOS, Data ONTAP 7-Mode, OpenSSH, openSUSE Leap, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity of this bulletin: 2/4.
Creation date: 22/01/2018.
Références of this threat: CVE-2016-10708, DLA-1257-1, DLA-1500-1, DLA-1500-2, K32485746, NTAP-20180423-0003, openSUSE-SU-2018:2128-1, SUSE-SU-2018:1989-1, SUSE-SU-2018:2275-1, SUSE-SU-2018:2530-1, SUSE-SU-2018:2685-1, SUSE-SU-2018:3540-1, SYMSA1469, USN-3809-1, VIGILANCE-VUL-25131.

Description of the vulnerability 

An attacker can force a NULL pointer to be dereferenced in OpenSSH via an out of order NEWKEYS message, in order to trigger a denial of service.
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This security note impacts software or systems such as Blue Coat CAS, ProxySG par Blue Coat, SGOS by Blue Coat, Broadcom Content Analysis, ProxySG by Symantec, SGOS by Symantec, Debian, BIG-IP Hardware, TMOS, Data ONTAP 7-Mode, OpenSSH, openSUSE Leap, SUSE Linux Enterprise Desktop, SLES, Ubuntu.

Our Vigil@nce team determined that the severity of this threat announce is medium.

The trust level is of type confirmed by the editor, with an origin of internet client.

An attacker with a expert ability can exploit this computer weakness announce.

Solutions for this threat 

OpenSSH: version 7.6.
The version 7.6 is fixed:
  http://www.openssh.com/

Debian 8: new openssh packages.
New packages are available:
  Debian 8: openssh 1:6.7p1-5+deb8u7

Debian: new openssh packages.
New packages are available:
  Debian 7: openssh 1:6.0p1-4+deb7u7

F5 BIG-IP: solution for OpenSSH.
The solution is indicated in information sources.

NetApp Data ONTAP: solution for OpenSSH.
The solution is indicated in information sources.

openSUSE Leap 42.3: new openssh packages.
New packages are available:
  openSUSE Leap 42.3: openssh 7.2p2-21.1

SUSE LE 11 SP3: new openssh packages.
New packages are available:
  SUSE LE 11 SP3: openssh 6.2p2-0.41.5.1

SUSE LE 11 SP4: new openssh packages.
New packages are available:
  SUSE LE 11 SP4: openssh 6.6p1-36.3.1

SUSE LE 12 RTM/SP1: new openssh packages.
New packages are available:
  SUSE LE 12 RTM: openssh 6.6p1-54.15.2
  SUSE LE 12 SP1: openssh 6.6p1-54.15.2

SUSE LE 12 SP2: new openssh packages.
New packages are available:
  SUSE LE 12 SP2: openssh 7.2p2-74.25.1

SUSE LE 12 SP3: new openssh packages.
New packages are available:
  SUSE LE 12 SP3: openssh 7.2p2-74.19.1

Ubuntu: new openssh-server packages.
New packages are available:
  Ubuntu 18.04 LTS: openssh-server 1:7.6p1-4ubuntu0.1
  Ubuntu 16.04 LTS: openssh-server 1:7.2p2-4ubuntu2.6
  Ubuntu 14.04 LTS: openssh-server 1:6.6p1-2ubuntu2.11
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