CVE-2018-15454

Adaptive Security Appliance Software vulnerability

CVSS

8.6

EPSS

4.4%

EPSS pct

90th

Exploited

No known

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.

Affected vendor

Cisco

Affected product

Adaptive Security Appliance Software

CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Weakness type (CWE)

CWE-20 — Improper Input Validation

Published

2018-11-01

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to availability.

Its EPSS score of 4.4% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 90% of all scored CVEs.

Check your external exposure to CVE-2018-15454

Confirm whether Cisco Adaptive Security Appliance Software is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2018-15454.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2018-15454

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2018-15454 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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