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Vulnerability of Cisco AnyConnect Secure Mobility Client: executing DLL code

Synthesis of the vulnerability 

An attacker can create a malicious DLL, and then put it in the current directory of Cisco AnyConnect Secure Mobility Client for MS-Windows, in order to run code with the system privileges.
Vulnerable products: Cisco AnyConnect Secure Mobility Client.
Severity of this weakness: 2/4.
Creation date: 08/06/2017.
Références of this bulletin: CERTFR-2017-AVI-171, cisco-sa-20170607-anyconnect, CVE-2017-6638, VIGILANCE-VUL-22920.

Description of the vulnerability 

The Cisco AnyConnect Secure Mobility Client product uses external shared libraries (DLL).

However, if the working directory contains a malicious DLL, it is automatically loaded.

An attacker can therefore create a malicious DLL, and then put it in the current directory of Cisco AnyConnect Secure Mobility Client for MS-Windows, in order to run code with the system privileges.
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This cybersecurity weakness impacts software or systems such as Cisco AnyConnect Secure Mobility Client.

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 user shell.

An attacker with a expert ability can exploit this vulnerability bulletin.

Solutions for this threat 

Cisco AnyConnect Secure Mobility Client: solution CSCvc97928.
The solution is described on the Cisco site:
  https://tools.cisco.com/bugsearch/bug/CSCvc97928
  https://tools.cisco.com/quickview/bug/CSCvc97928
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