CVE-2018-15443

Cisco Firepower Detection Engine TCP Intrusion Prevention System Rule Bypass Vulnerability

Description

A vulnerability in the detection engine of Cisco Firepower System Software could allow an unauthenticated, remote attacker to bypass a configured Intrusion Prevention System (IPS) rule that inspects certain types of TCP traffic. The vulnerability is due to incorrect TCP retransmission handling. An attacker could exploit this vulnerability by sending a crafted TCP connection request through an affected device. A successful exploit could allow the attacker to bypass configured IPS rules and allow uninspected traffic onto the network.

Category

5.8
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.92% Top 30%
Vendor Advisory cisco.com
Affected: Cisco Cisco Firepower Management Center
Published at:
Updated at:

References

Link Tags
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20181107-fde-tcp-bypass vendor advisory
http://www.securityfocus.com/bid/105870 third party advisory vdb entry

Frequently Asked Questions

What is the severity of CVE-2018-15443?
CVE-2018-15443 has been scored as a medium severity vulnerability.
How to fix CVE-2018-15443?
To fix CVE-2018-15443, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2018-15443 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2018-15443 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2018-15443?
CVE-2018-15443 affects Cisco Cisco Firepower Management Center.
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