CVE-2018-15454

Name: CVE-2018-15454
Creator: NVD / NIST
Published: 2018-11-01T12:29:00.19+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 4.38%

Last modified Jun 17, 2026

CVE-2018-15454 is a vulnerability of currently unknown severity. A vulnerability in the Session Initiation Protocol (SIP) inspection engine of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause an affected device to reload or trigger high CPU, resulting in a denial of service (DoS) condition. The vulnerability is due to improper handling of SIP traffic. EPSS estimates a 4.38% chance of exploitation in the next 30 days.

Description

A vulnerability in the Session Initiation Protocol (SIP) inspection engine of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause an affected device to reload or trigger high CPU, resulting in a denial of service (DoS) condition. The vulnerability is due to improper handling of SIP traffic. An attacker could exploit this vulnerability by sending SIP requests designed to specifically trigger this issue at a high rate across an affected device. Software updates that address this vulnerability are not yet available.

Metrics

EPSS Probability

4.38%

90.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Cisco	Adaptive Security Appliance Software	>= 9.4, < 9.4.4.27
Cisco	Adaptive Security Appliance Software	>= 9.6, < 9.6.4.18
Cisco	Adaptive Security Appliance Software	>= 9.8, < 9.8.3.16
Cisco	Adaptive Security Appliance Software	>= 9.9, < 9.9.2.32
Cisco	Adaptive Security Appliance Software	>= 9.10, < 9.10.1.2
Cisco	Firepower Threat Defense	>= 6.1.0, < 6.1.0.7
Cisco	Firepower Threat Defense	>= 6.2.0, < 6.2.0.6
Cisco	Firepower Threat Defense	>= 6.2.2, < 6.2.2.4
Cisco	Firepower Threat Defense	>= 6.2.3, < 6.2.3.7

References

http://www.securityfocus.com/bid/105768Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1042129Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20181031-asaftd-sip-dosMitigation, Vendor Advisory
http://www.securityfocus.com/bid/105768Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1042129Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20181031-asaftd-sip-dosMitigation, Vendor Advisory

Timeline

Published: Nov 1, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-15454?

How severe is CVE-2018-15454?

Severity scoring for CVE-2018-15454 is pending analysis. The EPSS model estimates a 4.38% probability of exploitation in the next 30 days.

How do I fix CVE-2018-15454?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-15454?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST