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CVE-2021-34753— Cisco Firepower Threat Defense 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 存在访问控制错误漏洞，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。

CVSS 5.8 · Medium EPSS 0.66% · P50
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I. Basic Information for CVE-2021-34753

Vulnerability Information
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Vulnerability Title
Cisco Firepower Threat Defense Ethernet Industrial Protocol Policy Bypass Vulnerabilities
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability 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. This vulnerability is due to incomplete processing during deep packet inspection for ENIP packets. An attacker could exploit this vulnerability 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 trigger and drop 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 存在访问控制错误漏洞，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-2021-34753

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III. Intelligence Information for CVE-2021-34753

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Vendor Advisories for CVE-2021-34753 (1)

Same Patch Batch · Cisco · 2024-11-15 · 50 CVEs total

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Showing top 20 of 50 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Cisco Firepower Threat Defense Software
Same vendor: Cisco
Same weakness: CWE-284

V. Comments for CVE-2021-34753

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