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Vulnerability of Zsh: privilege escalation via zmodload

Synthesis of the vulnerability 

An attacker can bypass restrictions via zmodload of Zsh, in order to escalate his privileges.
Impacted products: iOS by Apple, iPhone, Debian, Fedora, RHEL.
Severity of this bulletin: 2/4.
Creation date: 03/03/2020.
Références of this threat: CVE-2019-20044, DLA-2117-1, FEDORA-2020-3f38f3e517, FEDORA-2020-9009363f0f, HT201222, HT211168, RHSA-2020:0853-01, RHSA-2020:0892-01, RHSA-2020:0903-01, RHSA-2020:0978-01, VIGILANCE-VUL-31713.

Description of the vulnerability 

An attacker can bypass restrictions via zmodload of Zsh, in order to escalate his privileges.
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This computer weakness note impacts software or systems such as iOS by Apple, iPhone, Debian, Fedora, RHEL.

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

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

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

Solutions for this threat 

Apple iOS: version 13.5.
The version 13.5 is fixed:
  https://support.apple.com/

Debian 8: new zsh packages.
New packages are available:
  Debian 8: zsh 5.0.7-5+deb8u1

Fedora: new zsh packages.
New packages are available:
  Fedora 30: zsh 5.7.1-6.fc30
  Fedora 31: zsh 5.7.1-6.fc31

RHEL 6.10: new zsh packages.
New packages are available:
  RHEL 6.10: zsh 4.3.11-11.el6_10

RHEL 7.7: new zsh packages.
New packages are available:
  RHEL 7.7: zsh 5.0.2-34.el7_7.2

RHEL 8.0: new zsh packages.
New packages are available:
  RHEL 8.0: zsh 5.5.1-6.el8_0.2

RHEL 8.1: new zsh packages.
New packages are available:
  RHEL 8.1: zsh 5.5.1-6.el8_1.2
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