CVE-2020-3564 Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software FTP Inspection Bypass Vulnerability

Medium 5.8 Published 21 Oct 2020 Updated 13 Nov 2024

An unauthenticated remote attacker can bypass FTP inspection on Cisco ASA and FTD devices by sending crafted traffic, allowing unauthorized FTP connections.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2020-3564?

CVE-2020-3564 is a medium-severity vulnerability in Cisco Adaptive Security Appliance, published on 21 Oct 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A vulnerability in the FTP inspection engine of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass FTP inspection. The vulnerability is due to ineffective flow tracking of FTP traffic. An attacker could exploit this vulnerability by sending crafted FTP traffic through an affected device. A successful exploit could allow the attacker to bypass FTP inspection and successfully complete FTP connections.

Weakness: CWE-436, CWE-284

Which versions are affected by CVE-2020-3564?

It affects 3 products.

Products include Cisco Adaptive Security Appliance, Cisco Adaptive Security Appliance Software, Cisco Secure Firewall Threat Defense.

How do I fix CVE-2020-3564?

No fix has been published for CVE-2020-3564 yet. Limit exposure of the affected software until one is available.

Is CVE-2020-3564 being exploited?

There is no known exploitation of CVE-2020-3564 in the wild and no public exploit code.

All Cisco Adaptive Security Appliance vulnerabilities

Sources

Also known as GHSA-67g9-87g9-j8g9.