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Vulnerability of ISC BIND: measure against denial of service ineffective

Synthesis of the vulnerability 

An attacker can bypass restrictions to the amount of simultaneous TCP connections to ISC BIND, in order to trigger a denial of service.
Impacted systems: Debian, VNX Operating Environment, VNX Series, BIG-IP Hardware, TMOS, IBM i, BIND, Junos Space, openSUSE Leap, RHEL, Slackware, SUSE Linux Enterprise Desktop, SLES, Synology DSM, Ubuntu.
Severity of this alert: 1/4.
Creation date: 25/04/2019.
Références of this alert: CERTFR-2019-AVI-187, CVE-2018-5743, DLA-1859-1, DSA-2020-030, DSA-4440-1, ibm10883384, JSA10993, K74009656, openSUSE-SU-2019:1532-1, openSUSE-SU-2019:1533-1, RHSA-2019:1145-01, RHSA-2019:1294-01, RHSA-2019:1492-01, RHSA-2019:2698-01, RHSA-2019:2977-01, SSA:2019-116-01, SUSE-SU-2019:1407-1, SUSE-SU-2019:14074-1, SUSE-SU-2019:1449-1, SUSE-SU-2019:2502-1, Synology-SA-19:20, USN-3956-1, USN-3956-2, VIGILANCE-VUL-29129.

Description of the vulnerability 

An attacker can bypass restrictions to the amount of simultaneous TCP connections to ISC BIND, in order to trigger a denial of service.
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This computer vulnerability bulletin impacts software or systems such as Debian, VNX Operating Environment, VNX Series, BIG-IP Hardware, TMOS, IBM i, BIND, Junos Space, openSUSE Leap, RHEL, Slackware, SUSE Linux Enterprise Desktop, SLES, Synology DSM, Ubuntu.

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

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 threat note.

Solutions for this threat 

ISC BIND: version 9.14.1.
The version 9.14.1 is fixed:
  https://www.isc.org/downloads/

ISC BIND: version 9.12.4-P1.
The version 9.12.4-P1 is fixed:
  https://www.isc.org/downloads/

ISC BIND: version 9.11.6-P1.
The version 9.11.6-P1 is fixed:
  https://www.isc.org/downloads/

Debian 8: new bind9 packages.
New packages are available:
  Debian 8: bind9 1:9.9.5.dfsg-9+deb8u18

Debian: new bind9 packages.
New packages are available:
  Debian 9: bind9 1:9.10.3.dfsg.P4-12.3+deb9u5

Dell EMC VNXe3200: version 3.1.11.10003441.
The version 3.1.11.10003441 is fixed:
  https://www.dell.com/support/

F5 BIG-IP: fixed versions for ISC BIND.
Fixed versions are indicated in information sources.

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

Junos Space: version 19.4R1.
The version 19.4R1 is fixed:
  https://www.juniper.net/support/downloads/

openSUSE Leap: new bind packages.
New packages are available:
  openSUSE Leap 42.3: bind 9.9.9P1-56.1
  openSUSE Leap 15.0: bind 9.11.2-lp150.8.13.1
  openSUSE Leap 15.1: bind 9.11.2-lp151.11.3.1

RHEL 6.10: new bind packages.
New packages are available:
  RHEL 6: bind 9.8.2-0.68.rc1.el6_10.3

RHEL 7.4: new bind packages.
New packages are available:
  RHEL 7: bind 9.9.4-51.el7_4.3

RHEL 7.5: new bind packages.
New packages are available:
  RHEL 7: bind 9.9.4-61.el7_5.2

RHEL: new bind packages.
New packages are available:
  RHEL 8: bind 9.11.4-17.P2.el8_0
  RHEL 7: bind 9.9.4-74.el7_6.1

Slackware Linux: new bind packages.
New packages are available:
  Slackware 14.0: bind 9.11.6_P1-*-1_slack14.0
  Slackware 14.1: bind 9.11.6_P1-*-1_slack14.1
  Slackware 14.2: bind 9.11.6_P1-*-1_slack14.2

SUSE LE 11: new bind packages.
New packages are available:
  SUSE LE 11 SP3: bind 9.9.6P1-0.51.15.4
  SUSE LE 11 SP4: bind 9.9.6P1-0.51.15.4

SUSE LE 12 RTM: new bind packages.
New packages are available:
  SUSE LE 12 RTM: bind 9.9.9P1-28.42.1

SUSE LE 12 SP4: new bind packages.
New packages are available:
  SUSE LE 12 SP4: bind 9.11.2-3.10.1

SUSE LE 15: new bind packages.
New packages are available:
  SUSE LE 15 RTM: bind 9.11.2-12.11.2
  SUSE LE 15 SP1: bind 9.11.2-12.11.2

Ubuntu: new bind9 packages.
New packages are available:
  Ubuntu 19.04: bind9 1:9.11.5.P1+dfsg-1ubuntu2.3
  Ubuntu 18.10: bind9 1:9.11.4+dfsg-3ubuntu5.3
  Ubuntu 18.04 LTS: bind9 1:9.11.3+dfsg-1ubuntu1.7
  Ubuntu 16.04 LTS: bind9 1:9.10.3.dfsg.P4-8ubuntu1.14
  Ubuntu 14.04 ESM: bind9 1:9.9.5.dfsg-3ubuntu0.19+esm1
  Ubuntu 12.04 ESM: bind9 1:9.8.1.dfsg.P1-4ubuntu0.28

Wind River Linux: version 10.18.44.12.
The version 10.18.44.12 is fixed:
  https://support2.windriver.com/

Wind River Linux: version 10.19.45.2.
The version 10.19.45.2 is fixed:
  https://support2.windriver.com/
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