CVE-2018-15458 Cisco Firepower Management Center Disk Utilization Denial of Service Vulnerability
An unauthenticated remote attacker can cause a denial of service by triggering unbounded log writes in Cisco FMC when Shell Access Filter is used with specific remote authentication.
- 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-2018-15458?
CVE-2018-15458 is a medium-severity denial of service vulnerability in Cisco Secure Firewall Management Center, published on 10 Jan 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability in the Shell Access Filter feature of Cisco Firepower Management Center (FMC), when used in conjunction with remote authentication, could allow an unauthenticated, remote attacker to cause high disk utilization, resulting in a denial of service (DoS) condition. The vulnerability occurs because the configuration of the Shell Access Filter, when used with a specific type of remote authentication, can cause a system file to have unbounded writes. An attacker could exploit this vulnerability by sending a steady stream of remote authentication requests to the appliance when the specific configuration is applied. Successful exploitation could allow the attacker to increase the size of a system log file so that it consumes most of the disk space. The lack of available disk space could lead to a DoS condition in which the device functions could operate abnormally, making the device unstable.
Which versions are affected by CVE-2018-15458?
It affects 1 product.
Products include Cisco Secure Firewall Management Center.
How do I fix CVE-2018-15458?
No fix has been published for CVE-2018-15458 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-2018-15458 being exploited?
There is no known exploitation of CVE-2018-15458 in the wild and no public exploit code.
Other vulnerabilities in Cisco Secure Firewall Management Center
- CVE-2026-20079 Cisco Firewall Management Center Authentication Bypass Using an Alternate Path or Channel
- CVE-2026-20131 Cisco Secure Firewall Management Center (FMC) Software and Cisco Security Cloud Control (SCC) Firewall Management Deserialization of Untrusted Data
- CVE-2026-20316 Cisco Secure Firewall Management Center Use of Hard-coded Password
- CVE-2025-20265 Cisco Secure Firewall Management Center Software Radius Remote Code Execution Vulnerability
- CVE-2024-20424 Command injection in Cisco Firepower Management Center
Sources
Also known as GHSA-jm4h-6jwp-8h23.