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Vulnerability of ISC BIND: privilege escalation via Update-policy Rules

Synthesis of the vulnerability 

An attacker can bypass restrictions via Update-policy Rules of ISC BIND, in order to escalate his privileges.
Impacted software: Debian, BIG-IP Hardware, TMOS, IBM i, BIND, openSUSE Leap, RHEL, Slackware, SLES, Synology DSM, Ubuntu.
Severity of this computer vulnerability: 2/4.
Creation date: 21/08/2020.
Références of this announce: 6350241, CERTFR-2020-AVI-523, CVE-2020-8624, DSA-4752-1, K91090139, openSUSE-SU-2020:1699-1, openSUSE-SU-2020:1701-1, RHSA-2020:4500-01, RHSA-2020:5011-01, RHSA-2020:5203-01, SSA:2020-234-01, SUSE-SU-2020:2914-1, Synology-SA-20:19, USN-4468-1, USN-4468-2, VIGILANCE-VUL-33130.

Description of the vulnerability 

An attacker can bypass restrictions via Update-policy Rules of ISC BIND, in order to escalate his privileges.
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This threat alert impacts software or systems such as Debian, BIG-IP Hardware, TMOS, IBM i, BIND, openSUSE Leap, RHEL, Slackware, SLES, Synology DSM, Ubuntu.

Our Vigil@nce team determined that the severity of this computer vulnerability bulletin is medium.

The trust level is of type confirmed by the editor, with an origin of user account.

An attacker with a expert ability can exploit this weakness note.

Solutions for this threat 

ISC BIND: version 9.16.6.
The version 9.16.6 is fixed:
  https://www.isc.org/download/

ISC BIND: version 9.11.22.
The version 9.11.22 is fixed:
  https://www.isc.org/download/

Debian 10: new bind9 packages.
New packages are available:
  Debian 10: bind9 1:9.11.5.P4+dfsg-5.1+deb10u2

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

RHEL 7.7: new bind packages.
New packages are available:
  RHEL 7.7: bind 9.11.4-9.P2.el7_7.3

RHEL 7.9: new bind packages.
New packages are available:
  RHEL 7.9: bind 9.11.4-26.P2.el7_9.2

RHEL 8: new bind packages.
New packages are available:
  RHEL 8.0-8.2: bind 9.11.20-5.el8

Slackware: new bind packages.
New packages are available:
  Slackware 14.0: bind 9.11.22-*-1_slack14.0
  Slackware 14.1: bind 9.11.22-*-1_slack14.1
  Slackware 14.2: bind 9.11.22-*-1_slack14.2

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

Ubuntu: new bind9 packages.
New packages are available:
  Ubuntu 20.04 LTS: bind9 1:9.16.1-0ubuntu2.3
  Ubuntu 18.04 LTS: bind9 1:9.11.3+dfsg-1ubuntu1.13
  Ubuntu 16.04 LTS: bind9 1:9.10.3.dfsg.P4-8ubuntu1.17
  Ubuntu 14.04 ESM: bind9 1:9.9.5.dfsg-3ubuntu0.19+esm3
  Ubuntu 12.04 ESM: bind9 1:9.8.1.dfsg.P1-4ubuntu0.31

Wind River Linux: version 10.19.45.12.
The version 10.19.45.12 is fixed:
  https://support2.windriver.com/index.php?page=cve&on=list&show=50&product_id=1&product_version%5B0%5D=24&id_status%5B0%5D=4&cve_id_filter=&s=&submit=&order_by=cve_modified_date&order_way=desc#list
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