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Synthesis of the vulnerability 
An attacker can traverse directories via Tar.php of Archive_Tar, in order to create a file outside the service root path.
 Vulnerable systems: Debian, Drupal Core, Fedora, IBM API Connect, Ubuntu.
Severity of this threat: 2/4.
Creation date: 21/01/2021.
Références of this weakness: 6440659, CERTFR-2021-AVI-050, CVE-2020-36193, DLA-2530-1, DLA-2621-1, DRUPAL-SA-CORE-2021-001, DSA-4894-1, FEDORA-2021-02996612f6, FEDORA-2021-dc7de65eed, USN-4723-1, VIGILANCE-VUL-34382.
Description of the vulnerability 
An attacker can traverse directories via Tar.php of Archive_Tar, in order to create a file outside the service root path.
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This security alert impacts software or systems such as Debian, Drupal Core, Fedora, IBM API Connect, Ubuntu.
Our Vigil@nce team determined that the severity of this security weakness 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 security announce.
Solutions for this threat 
Drupal Core: version 9.1.3.
The version 9.1.3 is fixed:
https://www.drupal.org/download
Drupal Core: version 9.0.11.
The version 9.0.11 is fixed:
https://www.drupal.org/download
Drupal Core: version 8.9.13.
The version 8.9.13 is fixed:
https://www.drupal.org/download
Drupal Core: version 7.78.
The version 7.78 is fixed:
https://www.drupal.org/download
Debian 10: new php-pear packages.
New packages are available:
Debian 10: php-pear 1:1.10.6+submodules+notgz-1.1+deb10u2
Debian 9: new drupal7 packages.
New packages are available:
Debian 9: drupal7 7.52-2+deb9u14
Debian 9: new php-pear packages.
New packages are available:
Debian 9: php-pear 1:1.10.1+submodules+notgz-9+deb9u3
Fedora 32: new php-pear packages.
New packages are available:
Fedora 32: php-pear 1.10.12-5.fc32
Fedora 33: new php-pear packages.
New packages are available:
Fedora 33: php-pear 1.10.12-5.fc33
IBM API Connect: solution for Drupal.
The solution is indicated in information sources.
Ubuntu: new php-pear packages.
New packages are available:
Ubuntu 20.10: php-pear 1:1.10.9+submodules+notgz-1ubuntu0.20.10.2
Ubuntu 20.04 LTS: php-pear 1:1.10.9+submodules+notgz-1ubuntu0.20.04.2
Ubuntu 18.04 LTS: php-pear 1:1.10.5+submodules+notgz-1ubuntu1.18.04.3
Ubuntu 16.04 LTS: php-pear 1:1.10.1+submodules+notgz-6ubuntu0.3
Full bulletin, software filtering, emails, fixes, ... (Request your free trial)
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