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Vulnerability of Cisco AnyConnect VPN Client: privilege escalation via vpnclient.ini

Synthesis of the vulnerability 

A local attacker can alter the vpnclient.ini file of Cisco AnyConnect VPN Client, in order to escalate his privileges.
Impacted software: AnyConnect VPN Client.
Severity of this computer vulnerability: 2/4.
Creation date: 07/10/2015.
Références of this announce: CVE-2015-7600, VIGILANCE-VUL-18052.

Description of the vulnerability 

The Cisco AnyConnect VPN Client product uses the vpnclient.ini configuration file.

This file can contain a "Command=" option indicating a command to run on start. However, a local attacker can alter this command, and wait for another user to run the VPN client.

A local attacker can therefore alter the vpnclient.ini file of Cisco AnyConnect VPN Client, in order to escalate his privileges.
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This cybersecurity note impacts software or systems such as AnyConnect VPN Client.

Our Vigil@nce team determined that the severity of this computer weakness announce is medium.

The trust level is of type confirmed by a trusted third party, with an origin of user shell.

A proof of concept or an attack tool is available, so your teams have to process this alert. An attacker with a technician ability can exploit this cybersecurity vulnerability.

Solutions for this threat 

Cisco AnyConnect VPN Client: workaround for vpnclient.ini.
A workaround is to define ACLs for vpnclient.ini.
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