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Vulnerability of ISC BIND: privilege escalation via krb5-subdomain/ms-subdomain Configuration Bypass

Synthesis of the vulnerability 

An attacker can bypass restrictions via krb5-subdomain/ms-subdomain Configuration Bypass of ISC BIND, in order to escalate his privileges.
Impacted software: IBM i, BIND, openSUSE Leap, Solaris, RHEL, SUSE Linux Enterprise Desktop, SLES.
Severity of this computer vulnerability: 2/4.
Creation date: 20/09/2018.
Références of this announce: bulletinapr2019, CERTFR-2018-AVI-453, CVE-2018-5741, ibm10787627, openSUSE-SU-2020:1699-1, openSUSE-SU-2020:1701-1, RHSA-2019:2057-01, SUSE-SU-2020:14400-1, SUSE-SU-2020:2914-1, VIGILANCE-VUL-27274.

Description of the vulnerability 

An attacker can bypass restrictions via krb5-subdomain/ms-subdomain Configuration Bypass of ISC BIND, in order to escalate his privileges.
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This computer threat alert impacts software or systems such as IBM i, BIND, openSUSE Leap, Solaris, RHEL, SUSE Linux Enterprise Desktop, SLES.

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

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

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

Solutions for this threat 

ISC BIND: workaround for krb5-subdomain/ms-subdomain Configuration Bypass.
A workaround is indicated in the information source.

IBM i: patch for BIND.
A patch is indicated in information sources.

openSUSE Leap 15.1: new bind packages.
New packages are available:
  openSUSE Leap 15.1: bind 9.16.6-lp151.11.9.1

openSUSE Leap 15.2: new bind packages.
New packages are available:
  openSUSE Leap 15.2: bind 9.16.6-lp152.14.3.1

Oracle Solaris: patch for third party software of April 2019 v1.
A patch is available:
  https://support.oracle.com/rs?type=doc&id=1448883.1

RHEL 7: new bind packages.
New packages are available:
  RHEL 7: bind 9.11.4-9.P2.el7

SUSE LE 11 SP3-4: new bind packages.
New packages are available:
  SUSE LE 11 SP3: bind 9.9.6P1-0.51.20.1
  SUSE LE 11 SP4: bind 9.9.6P1-0.51.20.1

SUSE LE 15: new bind packages.
New packages are available:
  SUSE LE 15 RTM: bind 9.16.6-12.32.1
  SUSE LE 15 SP1: bind 9.16.6-12.32.1
  SUSE LE 15 SP2: bind 9.16.6-12.32.1

Wind River Linux: solution (28/11/2018).
The solution is indicated in information sources.
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