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Vulnerability of libssh2: out-of-bounds memory reading via SSH_MSG_DISCONNECT

Synthesis of the vulnerability 

An attacker can force a read at an invalid address via SSH_MSG_DISCONNECT of libssh2, in order to trigger a denial of service, or to obtain sensitive information.
Impacted systems: Debian, Fedora, QRadar SIEM, WebSphere MQ, McAfee Web Gateway, openSUSE Leap, RHEL, RSA Authentication Manager, SUSE Linux Enterprise Desktop, SLES.
Severity of this alert: 3/4.
Creation date: 06/11/2019.
Références of this alert: 6403299, 6408848, 6408858, CVE-2019-17498, DLA-1991-1, DSA-2019-189, FEDORA-2019-91529f19e4, openSUSE-SU-2019:2483-1, openSUSE-SU-2020:2126-1, openSUSE-SU-2020:2129-1, RHSA-2020:3915-01, SUSE-SU-2019:14206-1, SUSE-SU-2019:14226-1, SUSE-SU-2019:2900-1, SUSE-SU-2019:2900-2, SUSE-SU-2019:2936-1, SUSE-SU-2020:3551-1, VIGILANCE-VUL-30797.

Description of the vulnerability 

An attacker can force a read at an invalid address via SSH_MSG_DISCONNECT of libssh2, in order to trigger a denial of service, or to obtain sensitive information.
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This weakness announce impacts software or systems such as Debian, Fedora, QRadar SIEM, WebSphere MQ, McAfee Web Gateway, openSUSE Leap, RHEL, RSA Authentication Manager, SUSE Linux Enterprise Desktop, SLES.

Our Vigil@nce team determined that the severity of this vulnerability alert is important.

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 threat announce.

Solutions for this threat 

Debian 8: new libssh2 packages.
New packages are available:
  Debian 8: libssh2 1.4.3-4.1+deb8u6

Fedora 31: new libssh2 packages.
New packages are available:
  Fedora 31: libssh2 1.9.0-3.fc31

IBM MQ Appliance: fixed versions for libssh2.
Fixed versions are indicated in information sources.

IBM QRadar SIEM: solution for Components1.
The solution is indicated in information sources.

IBM QRadar SIEM: solution for Components3.
The solution is indicated in information sources.

McAfee Web Gateway: version 8.2.15.
The version 8.2.15 is fixed:
  https://www.mcafee.com/

McAfee Web Gateway: version 9.2.6.
The version 9.2.6 is fixed:
  https://www.mcafee.com/

openSUSE Leap 15.1: new libssh2 packages (01/12/2020).
New packages are available:
  openSUSE Leap 15.1: libssh2 1-1.9.0-lp151.6.6.1

openSUSE Leap 15.1: new libssh2 packages (12/11/2019).
New packages are available:
  openSUSE Leap 15.1: libssh2 1.8.0-lp151.6.3.1

openSUSE Leap 15.2: new libssh2 packages.
New packages are available:
  openSUSE Leap 15.2: libssh2 1-1.9.0-lp152.8.3.1

RHEL 7.8: new libssh2 packages.
New packages are available:
  RHEL 7.0-7.8: libssh2 1.8.0-4.el7

RSA Authentication Manager: version 8.4 Patch 9.
The version 8.4 Patch 9 is fixed:
  https://www.dell.com/support/

SUSE LE 11 SP3: new libssh2_org packages.
New packages are available:
  SUSE LE 11 SP3: libssh2_org 1.2.9-4.2.12.18.1

SUSE LE 11 SP4: new libssh2 packages.
New packages are available:
  SUSE LE 11 SP4: libssh2 1-1.4.3-17.12.1

SUSE LE 12: new libssh2 packages.
New packages are available:
  SUSE LE 12 SP1: libssh2 1.4.3-20.14.1
  SUSE LE 12 SP2: libssh2 1.4.3-20.14.1
  SUSE LE 12 SP3: libssh2 1.4.3-20.14.1
  SUSE LE 12 SP4: libssh2 1.4.3-20.14.1
  SUSE LE 12 SP5: libssh2 1.4.3-20.14.1

SUSE LE 15: new libssh2 packages (06/11/2019).
New packages are available:
  SUSE LE 15 RTM: libssh2 1-1.8.0-4.10.1
  SUSE LE 15 SP1: libssh2 1-1.8.0-4.10.1

SUSE LE 15: new libssh2 packages (30/11/2020).
New packages are available:
  SUSE LE 15 RTM: libssh2 1.9.0-4.13.1
  SUSE LE 15 SP1: libssh2 1.9.0-4.13.1
  SUSE LE 15 SP2: libssh2 1.9.0-4.13.1

SUSE LE 15 RTM: new libssh2_org packages.
New packages are available:
  SUSE LE 15 RTM: libssh2_org 1.8.0-4.10.1
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