SECUFOCUSNOW
⌕
Home›CVE index›CVE-2018-15454
Review reviewHigh

CVE-2018-15454

Cisco Cisco Adaptive Security Appliance (ASA) Software, adaptive security appliance software, secure firewall threat defense

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 vulnerabili...

CVSS
8.6
EPSS
4.38%
90.4% percentile
CISA KEV
Not listed
Published
2018.11.01
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability4.38%
Technical severityCVSS 8.6

Vulnerability overview

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 vulnerabili...

Affected product and versions

Product
Cisco Cisco Adaptive Security Appliance (ASA) Software, adaptive security appliance software, secure firewall threat defense
Affected versions
>= 9.4, >= 9.4 < 9.4.4.27, >= 9.6 < 9.6.4.18, >= 9.8 < 9.8.3.16, >= 9.9 < 9.9.2.32, >= 9.10 < 9.10.1.2, >= 6.1.0 < 6.1.0.7, >= 6.2.0 < 6.2.0.6, >= 6.2.2 < 6.2.2.4, >= 6.2.3 < 6.2.3.7
Fixed versions
9.4.4.27, 9.6.4.18, 9.8.3.16, 9.9.2.32, 9.10.1.2, 6.1.0.7, 6.2.0.6, 6.2.2.4, 6.2.3.7

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Cisco Cisco Adaptive Security Appliance (ASA) Software, adaptive security appliance software, secure firewall threat defense and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
CWE
CWE-20