CVE-2023-20071

Published Nov 1, 2023 CVSS 3.1 · 5.8 Medium EPSS < 1% KEV · Not listed

Description

Multiple Cisco products are affected by a vulnerability in the Snort detection engine that could allow an unauthenticated, remote attacker to bypass the configured policies on an affected system. This vulnerability is due to a flaw in the FTP module of the Snort detection engine. An attacker could exploit this vulnerability by sending crafted FTP traffic through an affected device. A successful exploit could allow the attacker to bypass FTP inspection and deliver a malicious payload.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Cisco

Cisco Firepower Threat Defense Software

affected

Version	Status	Constraints
`6.2.3`	affected	—
`6.2.3.1`	affected	—
`6.2.3.2`	affected	—
`6.2.3.3`	affected	—
`6.2.3.4`	affected	—
`6.2.3.5`	affected	—
`6.2.3.6`	affected	—
`6.2.3.7`	affected	—
`6.2.3.8`	affected	—
`6.2.3.10`	affected	—
`6.2.3.11`	affected	—
`6.2.3.9`	affected	—
`6.2.3.12`	affected	—
`6.2.3.13`	affected	—
`6.2.3.14`	affected	—
`6.2.3.15`	affected	—
`6.2.3.16`	affected	—
`6.2.3.17`	affected	—
`6.2.3.18`	affected	—
`6.6.0`	affected	—
`6.6.0.1`	affected	—
`6.6.1`	affected	—
`6.6.3`	affected	—
`6.6.4`	affected	—
`6.6.5`	affected	—
`6.6.5.1`	affected	—
`6.6.5.2`	affected	—
`6.6.7`	affected	—
`6.6.7.1`	affected	—
`6.4.0`	affected	—
`6.4.0.1`	affected	—
`6.4.0.3`	affected	—
`6.4.0.2`	affected	—
`6.4.0.4`	affected	—
`6.4.0.5`	affected	—
`6.4.0.6`	affected	—
`6.4.0.7`	affected	—
`6.4.0.8`	affected	—
`6.4.0.9`	affected	—
`6.4.0.10`	affected	—
`6.4.0.11`	affected	—
`6.4.0.12`	affected	—
`6.4.0.13`	affected	—
`6.4.0.14`	affected	—
`6.4.0.15`	affected	—
`6.4.0.16`	affected	—
`6.7.0`	affected	—
`6.7.0.1`	affected	—
`6.7.0.2`	affected	—
`6.7.0.3`	affected	—
`7.0.0`	affected	—
`7.0.0.1`	affected	—
`7.0.1`	affected	—
`7.0.1.1`	affected	—
`7.0.2`	affected	—
`7.0.2.1`	affected	—
`7.0.3`	affected	—
`7.0.4`	affected	—
`7.0.5`	affected	—
`7.1.0`	affected	—
`7.1.0.1`	affected	—
`7.1.0.2`	affected	—
`7.1.0.3`	affected	—
`7.2.0`	affected	—
`7.2.0.1`	affected	—
`7.2.1`	affected	—
`7.2.2`	affected	—
`7.2.3`	affected	—
`7.3.0`	affected	—
`7.3.1`	affected	—
`7.3.1.1`	affected	—

Cisco

Cisco Umbrella Insights Virtual Appliance

affected

Version	Status	Constraints
`N/A`	affected	—

Cisco

Cisco Cyber Vision

affected

Version	Status	Constraints
`3.0.4`	affected	—
`3.0.0`	affected	—
`3.0.1`	affected	—
`3.0.2`	affected	—
`3.0.3`	affected	—
`3.0.5`	affected	—
`3.0.6`	affected	—
`3.1.0`	affected	—
`3.1.2`	affected	—
`3.1.1`	affected	—
`3.2.3`	affected	—
`3.2.1`	affected	—
`3.2.4`	affected	—
`3.2.0`	affected	—
`3.2.2`	affected	—
`4.0.0`	affected	—
`4.0.1`	affected	—
`4.0.2`	affected	—
`4.0.3`	affected	—
`4.1.0`	affected	—
`4.1.1`	affected	—
`4.1.2`	affected	—

Cisco

Cisco UTD SNORT IPS Engine Software

affected

Version	Status	Constraints
`16.12.1a`	affected	—
`16.12.2`	affected	—
`16.12.3`	affected	—
`16.12.4`	affected	—
`16.12.5`	affected	—
`16.12.6`	affected	—
`16.12.7`	affected	—
`16.12.8`	affected	—
`16.6.1`	affected	—
`16.6.5`	affected	—
`16.6.6`	affected	—
`16.6.7a`	affected	—
`16.6.9`	affected	—
`16.6.10`	affected	—
`17.1.1`	affected	—
`17.2.1r`	affected	—
`17.3.1a`	affected	—
`17.3.2`	affected	—
`17.3.3`	affected	—
`17.3.4a`	affected	—
`17.3.6`	affected	—
`17.3.5`	affected	—
`17.3.7`	affected	—
`3.17.0S`	affected	—
`3.17.1S`	affected	—
`17.4.1a`	affected	—
`17.4.2`	affected	—
`17.4.1b`	affected	—
`17.5.1a`	affected	—
`17.6.1a`	affected	—
`17.6.2`	affected	—
`17.6.3a`	affected	—
`17.6.4`	affected	—
`17.6.5`	affected	—
`17.7.1a`	affected	—
`17.7.2`	affected	—
`17.10.1a`	affected	—
`17.9.1a`	affected	—
`17.9.2a`	affected	—
`17.9.3a`	affected	—
`17.8.1a`	affected	—
`Fuji-16.9.2`	affected	—
`Fuji-16.9.4`	affected	—
`Fuji-16.9.6`	affected	—
`Fuji-16.9.3`	affected	—
`Fuji-16.9.7`	affected	—
`Fuji-16.9.8`	affected	—
`Fuji-16.9.5`	affected	—
`Denali-16.3.3`	affected	—
`Denali-16.3.9`	affected	—
`Denali-16.3.7`	affected	—
`Denali-16.3.5`	affected	—
`Denali-16.3.4`	affected	—
`Everest-16.6.3`	affected	—
`Everest-16.6.4`	affected	—
`Everest-16.6.2`	affected	—

Configuration 1 [-]

AND

OR	cpe:2.3:a:cisco:secure_firewall_threat_defense::::::::
	cpe:2.3:a:cisco:secure_firewall_threat_defense::::::::
	cpe:2.3:a:cisco:secure_firewall_threat_defense::::::::
	cpe:2.3:a:cisco:secure_firewall_threat_defense::::::::

cpe:2.3:a:snort:snort:2.0:-:*:*:*:*:*:*

Configuration 2 [-]

AND

OR	cpe:2.3:a:cisco:secure_firewall_threat_defense::::::::
	cpe:2.3:a:cisco:secure_firewall_threat_defense::::::::
	cpe:2.3:a:cisco:secure_firewall_threat_defense::::::::

cpe:2.3:a:snort:snort:*:*:*:*:*:*:*:*

Configuration 3 [-]

cpe:2.3:a:cisco:cyber_vision:*:*:*:*:*:*:*:*

Configuration 4 [-]

OR	cpe:2.3:a:cisco:unified_threat_defense::::::::
	cpe:2.3:a:cisco:unified_threat_defense::::::::
	cpe:2.3:a:cisco:unified_threat_defense::::::::
	cpe:2.3:a:cisco:unified_threat_defense::::::::
	cpe:2.3:a:cisco:unified_threat_defense::::::::

Configuration 5 [-]

cpe:2.3:o:cisco:meraki_mx_security_appliance_firmware:-:*:*:*:*:*:*:*

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

Source	ID	Title
EUVD	EUVD-2023-24250	Multiple Cisco products are affected by a vulnerability in the Snort detection engine that could allow an unauthenticated, remote attacker to bypass the configured policies on an affected system. This vulnerability is due to a flaw in the FTP module of the Snort detection engine. An attacker could exploit this vulnerability by sending crafted FTP traffic through an affected device. A successful exploit could allow the attacker to bypass FTP inspection and deliver a malicious payload.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Changed

Confidentiality Impact None

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.684% probability within 30 days)

Key SSVC decision points have not yet been added.

References

Link	Providers
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort-ftd-zXYtnjOM

History

Aug 11, 2026 8:00 PM First appearance in the feed. Affected versions updated. Affected vendors updated View changes

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