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Vulnerability of Python urllib: data transit via parse_qsl

Synthesis of the vulnerability 

An attacker can bypass filtering rules via parse_qsl() of Python urllib, in order to transmit malicious data.
Impacted software: Debian, Fedora, SnapCenter Backup Management, openSUSE Leap, Solaris, Python, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity of this computer vulnerability: 2/4.
Creation date: 16/02/2021.
Références of this announce: 42967, CVE-2021-23336, DLA-2569-1, DLA-2619-1, DLA-2628-1, FEDORA-2021-1bb399a5af, FEDORA-2021-2897f5366c, FEDORA-2021-309bc2e727, FEDORA-2021-b326fcb83f, FEDORA-2021-b76ede8f4d, FEDORA-2021-ef83e8525a, NTAP-20210326-0004, openSUSE-SU-2021:0435-1, SUSE-SU-2021:0768-1, SUSE-SU-2021:0794-1, SUSE-SU-2021:0886-1, SUSE-SU-2021:0887-1, SUSE-SU-2021:0947-1, USN-4742-1, VIGILANCE-VUL-34588.

Description of the vulnerability 

An attacker can bypass filtering rules via parse_qsl() of Python urllib, in order to transmit malicious data.
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This vulnerability bulletin impacts software or systems such as Debian, Fedora, SnapCenter Backup Management, openSUSE Leap, Solaris, Python, SUSE Linux Enterprise Desktop, SLES, Ubuntu.

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

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 cybersecurity note.

Solutions for this threat 

Python: version 3.9.2.
The version 3.9.2 is fixed:
  https://www.python.org/downloads/

Python: version 3.8.8.
The version 3.8.8 is fixed:
  https://www.python.org/downloads/

Python: version 3.7.10.
The version 3.7.10 is fixed:
  https://www.python.org/downloads/

Python: version 3.6.13.
The version 3.6.13 is fixed:
  https://www.python.org/downloads/

Python urllib: patch for parse_qsl.
A patch is indicated in information sources.

Debian 9: new python2.7 packages.
New packages are available:
  Debian 9: python2.7 2.7.13-2+deb9u5

Debian 9: new python3.5 packages.
New packages are available:
  Debian 9: python3.5 3.5.3-1+deb9u4

Debian 9: new python-django packages.
New packages are available:
  Debian 9: python-django 1:1.10.7-2+deb9u11

Fedora 32-33: new mingw-python3 packages.
New packages are available:
  Fedora 32: mingw-python3 3.8.8-1.fc32
  Fedora 33: mingw-python3 3.9.2-1.fc33

Fedora 32-33: new python3.10 packages.
New packages are available:
  Fedora 32: python3.10 3.10.0~a6-1.fc32
  Fedora 33: python3.10 3.10.0~a6-1.fc33

Fedora 32-33: new python-django packages.
New packages are available:
  Fedora 32: python-django 3.0.13-1.fc32
  Fedora 33: python-django 3.0.13-1.fc33

openSUSE Leap 15.2: new python packages.
New packages are available:
  openSUSE Leap 15.2: python 2.7.18-lp152.3.15.1

Oracle Solaris: patch for third party software of April 2021 v1.
A patch is available:
  https://support.oracle.com/rs?type=doc&id=1448883.1

SUSE LE 12 SP2-5: new python packages.
New packages are available:
  SUSE LE 12 SP2: python 2.7.18-28.67.1
  SUSE LE 12 SP3: python 2.7.18-28.67.1
  SUSE LE 12 SP4: python 2.7.18-28.67.1
  SUSE LE 12 SP5: python 2.7.18-28.67.1

SUSE LE 12 SP5: new python36 packages.
New packages are available:
  SUSE LE 12 SP5: python36 3.6.13-4.36.1

SUSE LE 12 SP5: new python3 packages.
New packages are available:
  SUSE LE 12 SP5: python3 3.4.10-25.66.1

SUSE LE 15 RTM-SP3: new python packages.
New packages are available:
  SUSE LE 15 RTM: python 2.7.18-7.55.1
  SUSE LE 15 SP1: python 2.7.18-7.55.1
  SUSE LE 15 SP2: python 2.7.18-7.55.1
  SUSE LE 15 SP3: python 2.7.18-7.55.1

SUSE LE 15 SP2: new python3 packages.
New packages are available:
  SUSE LE 15 SP2: python3 3.6.13-3.78.1

Ubuntu: new python-django packages.
New packages are available:
  Ubuntu 20.10: python3-django 2:2.2.16-1ubuntu0.2
  Ubuntu 20.04 LTS: python3-django 2:2.2.12-1ubuntu0.4
  Ubuntu 18.04 LTS: python-django 1:1.11.11-1ubuntu1.11, python3-django 1:1.11.11-1ubuntu1.11
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