CVE-2021-34754
published 2021-10-27CVE-2021-34754: Multiple vulnerabilities in the payload inspection for Ethernet Industrial Protocol (ENIP) traffic for Cisco Firepower Threat Defense (FTD) Software could…
PriorityP347high7.5CVSS 3.1
AVNACLPRNUINSUCNIHAN
EPSS
0.97%
58.9th percentile
Multiple vulnerabilities in the payload inspection for Ethernet Industrial Protocol (ENIP) traffic for Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass configured rules for ENIP traffic. These vulnerabilities are due to incomplete processing during deep packet inspection for ENIP packets. An attacker could exploit these vulnerabilities by sending a crafted ENIP packet to the targeted interface. A successful exploit could allow the attacker to bypass configured access control and intrusion policies that should be activated for the ENIP packet.
Affected
11 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| cisco | cisco_firepower_threat_defense_software | — | — |
| cisco | firepower_threat_defense | — | — |
| cisco | secure_firewall_management_center | — | — |
| cisco | secure_firewall_management_center | — | — |
| cisco | secure_firewall_management_center | — | — |
| cisco | secure_firewall_management_center | — | — |
| cisco | secure_firewall_management_center | — | — |
| cisco | secure_firewall_threat_defense | >= 6.4.0 < 6.4.0.13 | 6.4.0.13 |
| cisco | secure_firewall_threat_defense | >= 6.6.0 < 6.6.5.1 | 6.6.5.1 |
| cisco | secure_firewall_threat_defense | >= 6.7.0 < 6.7.0.3 | 6.7.0.3 |
| cisco | secure_firewall_threat_defense | >= 7.0.0 < 7.0.1 | 7.0.1 |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
nvdv2.05.0MEDIUMAV:N/AC:L/Au:N/C:N/I:P/A:N
vendor_cisco5.8MEDIUM
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VulDB
Cisco Firepower Threat Defense Deep Packet Inspection access control (cisco-sa-ftd-enip-bypass-eFsxd8KP)
vuldb·2026-08-12·CVSS 7.5
CVE-2021-34754 [HIGH] Cisco Firepower Threat Defense Deep Packet Inspection access control (cisco-sa-ftd-enip-bypass-eFsxd8KP)
A vulnerability classified as critical was found in Cisco Firepower Threat Defense. This vulnerability affects unknown code of the component Deep Packet Inspection. Executing a manipulation can lead to improper access controls.
The identification of this vulnerability is CVE-2021-34754. The attack may be launched remotely. There is no exploit available.
Upgrading the affected component is advised.
GHSA
GHSA-3j6c-cpfp-ff5p: Multiple vulnerabilities in the payload inspection for Ethernet Industrial Protocol (ENIP) traffic for Cisco Firepower Threat Defense (FTD) Software c
ghsa_unreviewed·2022-05-24
CVE-2021-34754 [HIGH] CWE-284 GHSA-3j6c-cpfp-ff5p: Multiple vulnerabilities in the payload inspection for Ethernet Industrial Protocol (ENIP) traffic for Cisco Firepower Threat Defense (FTD) Software c
Multiple vulnerabilities in the payload inspection for Ethernet Industrial Protocol (ENIP) traffic for Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass configured rules for ENIP traffic. These vulnerabilities are due to incomplete processing during deep packet inspection for ENIP packets. An attacker could exploit these vulnerabilities by sending a crafted ENIP packet to the targeted interface. A successful exploit could allow the attacker to bypass configured access control and intrusion policies that should be activated for the ENIP packet.
Cisco
Cisco Firepower Threat Defense Software Ethernet Industrial Protocol Policy Bypass Vulnerabilities
vendor_cisco·2021-10-27·CVSS 5.8
CVE-2021-34753 [MEDIUM] CWE-284 Cisco Firepower Threat Defense Software Ethernet Industrial Protocol Policy Bypass Vulnerabilities
Cisco Firepower Threat Defense Software Ethernet Industrial Protocol Policy Bypass Vulnerabilities
Multiple vulnerabilities in the payload inspection for Ethernet Industrial Protocol (ENIP) traffic for Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass configured rules for ENIP traffic.
These vulnerabilities are due to incomplete processing during deep packet inspection for ENIP packets. An attacker could exploit these vulnerabilities by sending a crafted ENIP packet to the targeted interface. A successful exploit could allow the attacker to bypass configured access control and intrusion policies that should be activated for the ENIP packet.
Cisco has released software updates that address these vulnerabilities. There are no workarounds
Cisco
Cisco Firepower Threat Defense Software Ethernet Industrial Protocol Policy Bypass Vulnerabilities
vendor_cisco·CVSS 3.1
CVE-2021-34754 Cisco Firepower Threat Defense Software Ethernet Industrial Protocol Policy Bypass Vulnerabilities
CVE-2021-34754: Cisco Firepower Threat Defense Software Ethernet Industrial Protocol Policy Bypass Vulnerabilities
Multiple vulnerabilities in the payload inspection for Ethernet Industrial Protocol (ENIP) traffic for Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass configured rules for ENIP traffic. These vulnerabilities are due to incomplete processing during deep packet inspection for ENIP packets. An attacker could exploit these vulnerabilities by sending a crafted ENIP packet to the targeted interface. A successful exploit could allow the attacker to bypass configured access control and intrusion policies that should be activated for the ENIP packet. Cisco has released software updates that address these vulnerabilities. There are
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2021-10-27
Published