PT-2018-1781 · Cisco · Cisco Firepower System

Published 2018-11-07 · Updated 2019-10-09 · CVE-2018-15443

Positive Technologies (AI Summary)

CVSS v3.1

5.8

Medium

Base vector

AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

Name of the Vulnerable Software and Affected Versions Cisco Firepower System Software (affected versions not specified)

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 issue is due to incorrect TCP retransmission handling. An attacker could exploit this by sending a crafted TCP connection request through an affected device, potentially allowing uninspected traffic onto the network.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Resource Exhaustion

Weakness Enumeration

CWE-400

Related Identifiers

BDU:2018-01381

CVE-2018-15443

Affected Products

Cisco Firepower System

References · 4

• https://bdu.fstec.ru/vul/2018-01381 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2018-15443 · Security Note
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20181107-fde-tcp-bypass · Vendor Advisory
• http://securityfocus.com/bid/105870 · Note