CVE-2021-34754— Cisco Firepower Threat Defense Software Ethernet Industrial Protocol Policy Bypass Vulnerabilities
Quick assessment
Affected
Cisco Cisco Firepower Threat Defense Software
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Cisco Firepower Threat Defense（FTD）是美国思科（Cisco）公司的一套提供下一代防火墙服务的统一软件。 Cisco Firepower Threat Defense Software 存在安全漏洞，该漏洞源于在对 ENIP 数据包进行深度数据包检查期间处理不完整造成的。攻击者可以通过向目标接口发送精心制作的 ENIP 数据包来利用这些漏洞。成功的利用可能允许攻击者绕过应该为 ENIP 数据包激活的配置访问控制和入侵策略。
Possible ATT&CK Techniques 1 AI
T1564.004 · NTFS File Attributes
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I. Basic Information for CVE-2021-34754
Vulnerability Information
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Vulnerability Title
Cisco Firepower Threat Defense Software Ethernet Industrial Protocol Policy Bypass Vulnerabilities
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco Firepower Threat Defense 访问控制错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco Firepower Threat Defense（FTD）是美国思科（Cisco）公司的一套提供下一代防火墙服务的统一软件。 Cisco Firepower Threat Defense Software 存在安全漏洞，该漏洞源于在对 ENIP 数据包进行深度数据包检查期间处理不完整造成的。攻击者可以通过向目标接口发送精心制作的 ENIP 数据包来利用这些漏洞。成功的利用可能允许攻击者绕过应该为 ENIP 数据包激活的配置访问控制和入侵策略。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Cisco | Cisco Firepower Threat Defense Software | n/a | - |
|
II. Public POCs for CVE-2021-34754
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2021-34754 (1)
-
Cisco Firepower Threat Defense Software Ethernet Industrial Protocol Policy Bypass Vulnerabilities vendor-advisory x_refsource_CISCO
Same Patch Batch · Cisco · 2021-10-27 · 20 CVEs total
| CVE-2021-40117 | 8.6 HIGH | Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software SSL/TLS D |
| CVE-2021-40116 | 8.6 HIGH | Multiple Cisco Products Snort Rule Denial of Service Vulnerability |
| CVE-2021-40118 | 8.6 HIGH | Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Web Servi |
| CVE-2021-34793 | 8.6 HIGH | Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Transpare |
| CVE-2021-34792 | 8.6 HIGH | Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Resource |
| CVE-2021-34783 | 8.6 HIGH | Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Software- |
| CVE-2021-34781 | 8.6 HIGH | Cisco Firepower Threat Defense Software SSH Connections Denial of Service Vulnerability |
| CVE-2021-34762 | 8.1 HIGH | Cisco Firepower Management Center Software Authenticated Directory Traversal Vulnerability |
| CVE-2021-40114 | 6.8 MEDIUM | Multiple Cisco Products Snort Memory Leak Denial of Service Vulnerability |
| CVE-2021-34755 | 6.7 MEDIUM | Cisco Firepower Threat Defense Software Command Injection Vulnerabilities |
| CVE-2021-34756 | 6.7 MEDIUM | Cisco Firepower Threat Defense Software Command Injection Vulnerabilities |
| CVE-2021-40125 | 5.3 MEDIUM | Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software IKEv2 Sit |
| CVE-2021-34787 | 5.3 MEDIUM | Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Identity- |
| CVE-2021-34794 | 5.3 MEDIUM | Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software SNMP Acce |
| CVE-2021-34764 | 4.8 MEDIUM | Cisco Firepower Management Center Software Cross-Site Scripting and Open Redirect Vulnerab |
| CVE-2021-34763 | 4.8 MEDIUM | Cisco Firepower Management Center Software Cross-Site Scripting and Open Redirect Vulnerab |
| CVE-2021-34790 | 4.7 MEDIUM | Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Applicati |
| CVE-2021-34791 | 4.7 MEDIUM | Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Applicati |
| CVE-2021-34761 | 4.4 MEDIUM | Cisco Firepower Threat Defense Software CLI Arbitrary File Write Vulnerability |
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V. Comments for CVE-2021-34754
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