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Vulnerability of unrar-free: directory traversal

Synthesis of the vulnerability 

An attacker can traverse directories of unrar-free, in order to create a file outside the service root path.
Vulnerable software: Debian.
Severity of this announce: 2/4.
Creation date: 08/09/2017.
Références of this computer vulnerability: CVE-2017-14120, DLA-1091-1, DLA-2567-1, VIGILANCE-VUL-23779.

Description of the vulnerability 

An attacker can traverse directories of unrar-free, in order to create a file outside the service root path.
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This vulnerability announce impacts software or systems such as Debian.

Our Vigil@nce team determined that the severity of this cybersecurity threat 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 computer threat bulletin.

Solutions for this threat 

Debian 7: new unrar-free packages.
New packages are available:
  Debian 7: unrar-free 1:0.0.1+cvs20071127-2+deb7u1

Debian 9: new unrar-free packages.
New packages are available:
  Debian 9: unrar-free 1:0.0.1+cvs20140707-1+deb9u1
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