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Vulnerability of Python pip: directory traversal via Install Command

Synthesis of the vulnerability 

An attacker can traverse directories via Install Command of Python pip, in order to alter a file outside the service root path.
Vulnerable products: Debian, openSUSE Leap, RHEL, SLES, Ubuntu.
Severity of this weakness: 2/4.
Creation date: 11/09/2020.
Références of this bulletin: CVE-2019-20916, DLA-2370-1, openSUSE-SU-2020:1598-1, openSUSE-SU-2020:1613-1, RHSA-2020:4273-01, RHSA-2020:4285-01, RHSA-2020:4432-01, RHSA-2020:4654-01, SUSE-SU-2020:2784-1, USN-4601-1, VIGILANCE-VUL-33312.

Description of the vulnerability 

An attacker can traverse directories via Install Command of Python pip, in order to alter a file outside the service root path.
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This vulnerability bulletin impacts software or systems such as Debian, openSUSE Leap, RHEL, 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 

Debian 9: new python-pip packages.
New packages are available:
  Debian 9: python-pip 9.0.1-2+deb9u2

openSUSE Leap 15.1-2: new python-pip packages.
New packages are available:
  openSUSE Leap 15.1: python2-pip 10.0.1-lp151.3.3.1, python3-pip 10.0.1-lp151.3.3.1
  openSUSE Leap 15.2: python2-pip 10.0.1-lp152.4.3.1, python3-pip 10.0.1-lp152.4.3.1

RHEL 6, 7: new rh-python36 packages.
New packages are available:
  RHEL 6.0-6.10: rh-python36 python-3.6.12-1.el6
  RHEL 7.0-7.9: rh-python36 python-3.6.12-1.el7

RHEL 7: new python27 packages.
New packages are available:
  RHEL 7.0-7.9: python27 python-2.7.18-2.el7

RHEL 8: new python27-2.7 module.
The following module is updated:
  RHEL 8 Module: python27:2.7

RHEL 8: new python-pip packages.
New packages are available:
  RHEL 8.0-8.2: python-pip 9.0.3-18.el8

SUSE LE 15: new python-pip packages.
New packages are available:
  SUSE LE 15 RTM: python2-pip 10.0.1-3.3.1, python3-pip 10.0.1-3.3.1
  SUSE LE 15 SP1: python3-pip 10.0.1-3.3.1
  SUSE LE 15 SP2: python3-pip 10.0.1-3.3.1

Ubuntu 18.04: new pip packages.
New packages are available:
  Ubuntu 18.04 LTS: python-pip 9.0.1-2.3~ubuntu1.18.04.4, python3-pip 9.0.1-2.3~ubuntu1.18.04.4
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