CVE-2019-12673 Denial of service in Cisco Adaptive Security Appliance (ASA) Software

High 8.6 Published 2 Oct 2019 Updated 19 Nov 2024

Unauthenticated remote attackers can cause a denial of service on Cisco ASA and FTD devices by sending malicious FTP traffic.

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-2019-12673?

CVE-2019-12673 is a high-severity denial of service vulnerability in Cisco Adaptive Security Appliance, published on 2 Oct 2019. 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 (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to insufficient validation of FTP data. An attacker could exploit this vulnerability by sending malicious FTP traffic through an affected device. A successful exploit could allow the attacker to cause a DoS condition on the affected device.

Weakness: CWE-20, CWE-119

Which versions are affected by CVE-2019-12673?

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-2019-12673?

No fix has been published for CVE-2019-12673 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2019-12673 being exploited?

There is no known exploitation of CVE-2019-12673 in the wild and no public exploit code.

All Cisco Adaptive Security Appliance vulnerabilities

Sources

Also known as GHSA-5pxf-pwcv-5hxr.