Another day, another vulnerability. Cisco Systems released this Monday a patch to fix a critical vulnerability in its Secure Sockets Layer VPN solution called Adaptative Security Appliance. According to a Cisco Security Advisor, the vulnerability could allow an authenticated and remote attacker to execute remote code on affected devices.

The vulnerability impacts approximately a dozen Cisco products ranging from 3000 Series Industrial Security Appliance, ASA 5500-X Series Next-Generation Firewalls and ASA 1000V Cloud Firewall. The bug (CVE-2018-0101) received a CVSS score of 10, the highest you can get. There are no workarounds available for the bug, Cisco said.

“The vulnerability is due to an attempt to double free a region of memory when the webvpn feature is enabled on the Cisco ASA device,” according to the advisory. “An attacker could exploit this vulnerability by sending multiple, crafted XML packets to a webvpn-configured interface on the affected system. An exploit could allow the attacker to execute arbitrary code and obtain full control of the system, or cause a reload of the affected device.”

 

Did you like what you read? Don’t miss any more posts by subscribing our newsletter now!

 

Traditional VPNs like Cisco’s expose an open port to the Internet, so any remote user on the planet can connect to it,” said Jason Garbis, co-chair of the Cloud Security Alliance’s Software-Defined Perimeter Working Group. The vulnerability, he said, will give an attacker access to a corporate network.

 

Garbis said:

“There are hundreds of thousands of these Cisco devices deployed worldwide. There are no workarounds – organizations must manually identify and patch all their Cisco ASA VPN servers in order to address this”

 

In its advisory, Cisco said it is aware of public knowledge of the vulnerability, but not aware of any instances the vulnerability has been exploited in the wild.


Deixe um comentário

O seu endereço de email não será publicado. Campos obrigatórios marcados com *