CVE-2023-20071

At a glance

Severity: MEDIUM 5.8
EPSS: EPSS 0.52 % · percentile 44 (2026-10-27)
State: PUBLISHED
Published: 2023-11-01
Updated: 2024-08-02
Assigner: cisco
NVD status: Modified

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.

Scores

Version	Score	Vector	Scored by
CVSS 3.1	MEDIUM 5.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N	cisco
CVSS 3.1	MEDIUM 5.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N	NVD · psirt@cisco.com (Secondary)
CVSS 3.1	MEDIUM 5.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N	NVD · nvd@nist.gov (Primary)

Weaknesses (CWE)

CWE-1039

European references

ENISA EUVD · EUVD-2023-24250
GCVE · GCVE-0-2023-20071

Affected configurations (NVD CPE)

cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:* < 6.4.0.17
cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:* ≥ 6.5.0 < 7.0.6
cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:* ≥ 7.1.0 < 7.2.4
cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:* ≥ 7.3.0 < 7.3.1.2
cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:* ≥ 6.7.0 < 7.0.5
cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:* ≥ 7.1.0 < 7.1.0.3
cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:* ≥ 7.2.0 < 7.2.1
cpe:2.3:a:cisco:cyber_vision:*:*:*:*:*:*:*:* < 4.1.3
cpe:2.3:a:cisco:unified_threat_defense:*:*:*:*:*:*:*:* ≥ 17.3 < 17.3.8
cpe:2.3:a:cisco:unified_threat_defense:*:*:*:*:*:*:*:* ≥ 17.6 < 17.6.6
cpe:2.3:a:cisco:unified_threat_defense:*:*:*:*:*:*:*:* ≥ 17.9 < 17.9.4
cpe:2.3:a:cisco:unified_threat_defense:*:*:*:*:*:*:*:* ≥ 17.11 < 17.11.1a
cpe:2.3:a:cisco:unified_threat_defense:*:*:*:*:*:*:*:* ≥ 17.12 < 17.12.1a
cpe:2.3:o:cisco:meraki_mx_security_appliance_firmware:-:*:*:*:*:*:*:*

Affected products

Product	Versions
Cisco · Cisco Firepower Threat Defense Software	affected 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
Cisco · Cisco Umbrella Insights Virtual Appliance	affected N/A
Cisco · Cisco Cyber Vision	affected 3.0.4 ; affected 3.0.0 ; affected 3.0.1 ; affected 3.0.2 ; affected 3.0.3 ; affected 3.0.5
Cisco · Cisco UTD SNORT IPS Engine Software	affected 16.12.1a ; affected 16.12.2 ; affected 16.12.3 ; affected 16.12.4 ; affected 16.12.5 ; affected 16.12.6

References

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

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD