module

Network Manager VPNC Username Privilege Escalation

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Disclosed
2018-07-26
Created
2019-03-19

Description

This module exploits an injection vulnerability in the Network Manager
VPNC plugin to gain root privileges.

This module uses a new line injection vulnerability in the configured
username for a VPN network connection to inject a `Password helper`
configuration directive into the connection configuration.

The specified helper is executed by Network Manager as root when the
connection is started.

Network Manager VPNC versions prior to 1.2.6 are vulnerable.

This module has been tested successfully with VPNC versions:
1.2.4-4 on Debian 9.0.0 (x64); and
1.1.93-1 on Ubuntu Linux 16.04.4 (x64).

Authors

Denis Andzakovic
bcoles bcoles@gmail.com

Platform

Linux

Architectures

x86, x64

References

Module Options

To display the available options, load the module within the Metasploit console and run the commands ‘show options’ or ‘show advanced’:


    msf > use exploit/linux/local/network_manager_vpnc_username_priv_esc
    msf exploit(network_manager_vpnc_username_priv_esc) > show targets
        ...targets...
    msf exploit(network_manager_vpnc_username_priv_esc) > set TARGET < target-id >
    msf exploit(network_manager_vpnc_username_priv_esc) > show options
        ...show and set options...
    msf exploit(network_manager_vpnc_username_priv_esc) > exploit
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