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Vulnerability of Cisco AnyConnect Secure Mobility Client: directory traversal

Synthesis of the vulnerability 

An attacker can traverse directories of Cisco AnyConnect Secure Mobility Client, in order to write a file outside the service root path.
Vulnerable products: Cisco AnyConnect Secure Mobility Client, AnyConnect VPN Client.
Severity of this weakness: 2/4.
Creation date: 31/07/2015.
Références of this bulletin: 40175, CSCut93920, CVE-2015-4289, VIGILANCE-VUL-17550.

Description of the vulnerability 

The Cisco AnyConnect Secure Mobility Client product offers a web service.

However, user's data are directly inserted in an access path. Sequences such as "/.." can thus be used to go in the upper directory.

An attacker can therefore traverse directories of Cisco AnyConnect Secure Mobility Client, in order to write a file outside the service root path.
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This computer threat alert impacts software or systems such as Cisco AnyConnect Secure Mobility Client, AnyConnect VPN Client.

Our Vigil@nce team determined that the severity of this weakness announce 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 bulletin.

Solutions for this threat 

Cisco AnyConnect Secure Mobility Client: solution CSCut93920.
The solution CSCut93920 is available:
  https://tools.cisco.com/bugsearch/bug/CSCut93920
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