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Vulnerability of Synology File Station: directory traversal

Synthesis of the vulnerability 

An attacker can traverse directories of Synology File Station, in order to create a file outside the service root path.
Impacted products: Synology DSM.
Severity of this bulletin: 2/4.
Creation date: 11/12/2017.
Références of this threat: CVE-2017-15893, Synology-SA-17:69, VIGILANCE-VUL-24723.

Description of the vulnerability 

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

Our Vigil@nce team determined that the severity of this threat alert 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 weakness alert.

Solutions for this threat 

Synology File Station: version 1.1.1-0099.
The version 1.1.1-0099 is fixed.
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