CVE-2018-15458: Cisco Firepower Management Center Disk Utilization Denial of Service Vulnerability
First published: Thu Jan 10 2019(Updated: )
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.
Credit: ykramarz@cisco.com ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco Secure Firewall Management Center | =6.2.2 | |
| Cisco Secure Firewall Management Center | =6.2.3 | |
| Cisco Secure Firewall Management Center | =6.3.0 | |
| Cisco Firepower Management Center Software | =6.2.2 | |
| Cisco Firepower Management Center Software | =6.2.3 | |
| Cisco Firepower Management Center Software | =6.3.0 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2018-15458?
CVE-2018-15458 is classified as a critical vulnerability due to its potential to cause a denial of service condition.
How do I fix CVE-2018-15458?
To mitigate CVE-2018-15458, upgrade the Cisco Firepower Management Center to the latest version as recommended by Cisco Security Advisories.
What systems are affected by CVE-2018-15458?
CVE-2018-15458 affects Cisco Secure Firewall Management Center and Cisco Firepower Management Center versions 6.2.2, 6.2.3, and 6.3.0.
Can CVE-2018-15458 be exploited remotely?
Yes, CVE-2018-15458 can be exploited by an unauthenticated remote attacker.
What symptoms might indicate an attack exploiting CVE-2018-15458?
Symptoms of an attack exploiting CVE-2018-15458 include high disk utilization and potential service outages in the affected Cisco products.
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- canonical/cisco secure firewall management center
- version/cisco secure firewall management center/6.2.2
- version/cisco secure firewall management center/6.2.3
- version/cisco secure firewall management center/6.3.0
- canonical/cisco firepower management center software
- version/cisco firepower management center software/6.2.2
- version/cisco firepower management center software/6.2.3
- version/cisco firepower management center software/6.3.0