ReviewHigh

CVE-2018-0230

Cisco Firepower 2100 Series Security Appliances, secure firewall threat defense, adaptive security appliance software

A vulnerability in the internal packet-processing functionality of Cisco Firepower Threat Defense (FTD) Software for Cisco Firepower 2100 Series Security Appliances could allow an unauthenticated, remote attacker to cause an affected device to stop processing traffic, resulting in a denial of service (DoS) condition. The vulnerability is due to the affected software improperly validating IP Version 4 (IPv4) and IP Version 6 (IPv6) packets after the software reassembles the packets (following IP Fragmentation). An attacker could exploit this vulnerability by sending a series of malicious, fr...

CVSS: 8.6
EPSS: 2.40%
CISA KEV: Not listed
Published: 2018.04.20

PRIORITY ASSESSMENT

Review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV

Exploit probability2.40%

Technical severityCVSS 8.6

Vulnerability overview

Affected product and versions

Product: Cisco Firepower 2100 Series Security Appliances, secure firewall threat defense, adaptive security appliance software
Affected versions: >= Cisco Firepower 2100 Series Security Appliances, 6.2.1, 6.2.2, 9.8(2)
Fixed versions: No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

1
Identify
Confirm that Cisco Firepower 2100 Series Security Appliances, secure firewall threat defense, adaptive security appliance software and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
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-400