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Vulnerability of Python Cryptography: information disclosure via finalize_with_tag

Synthesis of the vulnerability 

An attacker can bypass access restrictions to data via finalize_with_tag() of Python Cryptography, in order to obtain sensitive information.
Impacted systems: Fedora, openSUSE Leap, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity of this alert: 2/4.
Creation date: 23/07/2018.
Références of this alert: CVE-2018-10903, FEDORA-2018-06c24068c6, FEDORA-2018-a9fe5e183e, openSUSE-SU-2018:3445-1, SUSE-SU-2018:3392-1, SUSE-SU-2020:0790-1, SUSE-SU-2020:0792-1, USN-3720-1, VIGILANCE-VUL-26819.

Description of the vulnerability 

An attacker can bypass access restrictions to data via finalize_with_tag() of Python Cryptography, in order to obtain sensitive information.
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This vulnerability impacts software or systems such as Fedora, openSUSE Leap, SUSE Linux Enterprise Desktop, SLES, Ubuntu.

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

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

An attacker with a expert ability can exploit this computer vulnerability note.

Solutions for this threat 

Fedora: new python-cryptography packages.
New packages are available:
  Fedora 27: python-cryptography 2.3-1.fc27
  Fedora 28: python-cryptography 2.3-1.fc28

openSUSE Leap 15.0: new python-cryptography packages.
New packages are available:
  openSUSE Leap 15.0: python-cryptography 2.1.4-lp150.3.3.1

SUSE LE 12 SP1: new python-cffi packages.
New packages are available:
  SUSE LE 12 SP1: python-cffi 1.11.2-2.19.2
  SUSE LE 12 SP2: python-cffi 1.11.2-5.11.1
  SUSE LE 12 SP3: python-cffi 1.11.2-5.11.1
  SUSE LE 12 SP4: python-cffi 1.11.2-5.11.1
  SUSE LE 12 SP5: python-cffi 1.11.2-5.11.1

SUSE LE 15: new python-cryptography packages.
New packages are available:
  SUSE LE 15 RTM: python-cryptography 2.1.4-4.3.1

Ubuntu 18.04: new python-cryptography packages.
New packages are available:
  Ubuntu 18.04 LTS: python-cryptography 2.1.4-1ubuntu1.2

Wind River Linux: solution (16/10/2018).
The solution is indicated in information sources.
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