CVE-2019-12700 Cisco FTD, FMC, and FXOS Software Pluggable Authentication Module Denial of Service Vulnerability
An authenticated remote attacker can cause a denial of service by exhausting system resources through multiple simultaneous SSH logins on Cisco Firepower devices.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2019-12700?
CVE-2019-12700 is a high-severity denial of service vulnerability in Cisco Firepower Extensible Operating System, published on 2 Oct 2019. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability in the configuration of the Pluggable Authentication Module (PAM) used in Cisco Firepower Threat Defense (FTD) Software, Cisco Firepower Management Center (FMC) Software, and Cisco FXOS Software could allow an authenticated, remote attacker to cause a denial of service (DoS) condition. The vulnerability is due to improper resource management in the context of user session management. An attacker could exploit this vulnerability by connecting to an affected system and performing many simultaneous successful Secure Shell (SSH) logins. A successful exploit could allow the attacker to exhaust system resources and cause the device to reload, resulting in a DoS condition. To exploit this vulnerability, the attacker needs valid user credentials on the system.
Weakness: CWE-400
Which versions are affected by CVE-2019-12700?
It affects 4 products.
Products include Cisco Firepower 9300 Firmware, Cisco Firepower Extensible Operating System, Cisco Secure Firewall Management Center, Cisco Secure Firewall Threat Defense.
How do I fix CVE-2019-12700?
No fix has been published for CVE-2019-12700 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-2019-12700 being exploited?
There is no known exploitation of CVE-2019-12700 in the wild and no public exploit code.
Other vulnerabilities in Cisco Firepower Extensible Operating System
All Cisco Firepower Extensible Operating System vulnerabilities
Sources
Also known as GHSA-5gfq-ghv5-4j5q.