CVE-2019-1981

Cisco Firepower Threat Defense Software NULL Character Obfuscation Detection Bypass Vulnerability

Published Nov 5, 2019 CVSS 3.1 · 5.8 Medium EPSS 1.0% KEV · Not listed
Description
A vulnerability in the normalization functionality of Cisco Firepower Threat Defense Software, Cisco FirePOWER Services Software for ASA, and Cisco Firepower Management Center Software could allow an unauthenticated, remote attacker to bypass filtering protections. The vulnerability is due to insufficient normalization of a text-based payload. An attacker could exploit this vulnerability by sending traffic that contains specifically obfuscated payloads through an affected device. An exploit could allow the attacker to bypass filtering and deliver malicious payloads to protected systems that would otherwise be blocked.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2019-10538 A vulnerability in the normalization functionality of Cisco Firepower Threat Defense Software, Cisco FirePOWER Services Software for ASA, and Cisco Firepower Management Center Software could allow an unauthenticated, remote attacker to bypass filtering protections. The vulnerability is due to insufficient normalization of a text-based payload. An attacker could exploit this vulnerability by sending traffic that contains specifically obfuscated payloads through an affected device. An exploit could allow the attacker to bypass filtering and deliver malicious payloads to protected systems that would otherwise be blocked.
History
Type Values Removed Values Added
First Time appeared Cisco secure Firewall Threat Defense
CPEs cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:* cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:*
Vendors & Products Cisco firepower Threat Defense
Cisco secure Firewall Threat Defense
Type Values Removed Values Added
First Time appeared Cisco secure Firewall Management Center
CPEs cpe:2.3:a:cisco:firepower_management_center:*:*:*:*:*:*:*:*
cpe:2.3:a:cisco:firepower_management_center:2.9.15:*:*:*:*:*:*:*
cpe:2.3:a:cisco:firepower_management_center:2.9.16:*:*:*:*:*:*:*
cpe:2.3:a:cisco:secure_firewall_management_center:*:*:*:*:*:*:*:*
cpe:2.3:a:cisco:secure_firewall_management_center:2.9.15:*:*:*:*:*:*:*
cpe:2.3:a:cisco:secure_firewall_management_center:2.9.16:*:*:*:*:*:*:*
Vendors & Products Cisco firepower Management Center
Cisco secure Firewall Management Center
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
cisco
Published
Updated
Nov 19, 2024, 6:52 PM
Reserved
Dec 6, 2018, 12:00 AM
Status
Modified
Published
Nov 5, 2019, 8:15 PM
Modified
Aug 11, 2026, 7:37 PM