Cisco AnyConnect Secure Mobility Client 4.0.x < 4.3.05017 / 4.4.x < 4.4.00243 SBL Module Privilege Escalation

This script is Copyright (C) 2017 Tenable Network Security, Inc.


Synopsis :

A VPN application installed on the remote host is affected by a
privilege escalation vulnerability.

Description :

The version of Cisco AnyConnect Secure Mobility Client installed on
the remote Windows host is 4.0.x prior to 4.3.05017 or 4.4.x prior to
4.4.00243. It is, therefore, affected by a privilege escalation
vulnerability in the Start Before Logon (SBL) module due to
insufficient access controls. A local attacker can exploit this to
open Internet Explorer with SYSTEM level privileges.

Note that the SBL module is not installed by default.

See also :

http://www.nessus.org/u?5b0700b1
https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvc43976

Solution :

Upgrade to Cisco AnyConnect Secure Mobility Client version 4.3.05017 /
4.4.00243 or later. Alternatively, either remove the SBL module or set
'UseStartBeforeLogon' to false in the client profile XML file.

Risk factor :

Medium / CVSS Base Score : 6.9
(CVSS2#AV:L/AC:M/Au:N/C:C/I:C/A:C)
CVSS Temporal Score : 5.7
(CVSS2#E:F/RL:OF/RC:ND)
Public Exploit Available : true

Family: Windows

Nessus Plugin ID: 97226 ()

Bugtraq ID: 96145

CVE ID: CVE-2017-3813

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