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Vulnerability of Synology DiskStation Manager: directory traversal

Synthesis of the vulnerability 

An attacker can traverse directories of Synology DiskStation Manager, in order to create a file outside the service root path.
Impacted software: Synology DSM.
Severity of this computer vulnerability: 2/4.
Creation date: 11/12/2017.
Références of this announce: CVE-2017-15894, Synology-SA-17:70, VIGILANCE-VUL-24724.

Description of the vulnerability 

An attacker can traverse directories of Synology DiskStation Manager, in order to create a file outside the service root path.
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This cybersecurity weakness impacts software or systems such as Synology DSM.

Our Vigil@nce team determined that the severity of this security vulnerability 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 vulnerability bulletin.

Solutions for this threat 

Synology DiskStation Manager: versions 5.2-5967-6 and 6.0.3-8754-3.
Versions 5.2-5967-6 and 6.0.3-8754-3 are fixed.
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