cisco-sa-20181003-ftd-inspect-dos: Cisco Firepower Threat Defense Software FTP Inspection Denial of Service Vulnerability
First published: Wed Oct 03 2018(Updated: )
A vulnerability in the FTP inspection engine of Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. The vulnerability exists because the affected software fails to release spinlocks when a device is running low on system memory, if the software is configured to apply FTP inspection and an access control rule to transit traffic, and the access control rule is associated with an FTP file policy. An attacker could exploit this vulnerability by sending a high rate of transit traffic through an affected device to cause a low-memory condition on the device. A successful exploit could allow the attacker to cause a software panic on the affected device, which could cause the device to reload and result in a temporary DoS condition. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20181003-ftd-inspect-dos
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco FTD Software | =6.2.3<6.2.3.4 6.2.3-851 6.2.3-9912 | 6.2.3.4
6.2.3-851
6.2.3-9912 |
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Frequently Asked Questions
What is the severity of cisco-sa-20181003-ftd-inspect-dos?
The severity of cisco-sa-20181003-ftd-inspect-dos is classified as high, as it permits unauthenticated remote attackers to trigger a denial of service.
How do I fix cisco-sa-20181003-ftd-inspect-dos?
To fix cisco-sa-20181003-ftd-inspect-dos, update your Cisco FTD software to version 6.2.3.4 or later.
What causes the vulnerability cisco-sa-20181003-ftd-inspect-dos?
The cisco-sa-20181003-ftd-inspect-dos vulnerability is caused by issues in the FTP inspection engine that allow for device reloads.
Is my Cisco FTD device affected by cisco-sa-20181003-ftd-inspect-dos?
Cisco FTD devices running versions prior to 6.2.3.4 are affected by cisco-sa-20181003-ftd-inspect-dos.
What are the potential impacts of cisco-sa-20181003-ftd-inspect-dos?
The potential impacts of cisco-sa-20181003-ftd-inspect-dos include loss of service and device reboots leading to a denial of service.
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