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CVE-2022-20767— Cisco Firepower Threat Defense Software DNS Enforcement Denial of Service Vulnerability

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 (FTD)存在资源管理错误漏洞，该漏洞源于对 DNS 信誉强制规则处理不当。攻击者可利用该漏洞在受影响的设备上造成拒绝服务条件 (DoS)。

CVSS 8.6 · High EPSS 1.61% · P74

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2022-20767

Vulnerability Information
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Vulnerability Title
Cisco Firepower Threat Defense Software DNS Enforcement Denial of Service Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the Snort rule evaluation function of Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper handling of the DNS reputation enforcement rule. An attacker could exploit this vulnerability by sending crafted UDP packets through an affected device to force a buildup of UDP connections. A successful exploit could allow the attacker to cause traffic that is going through the affected device to be dropped, resulting in a DoS condition. Note: This vulnerability only affects Cisco FTD devices that are running Snort 3.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
资源管理错误
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco Firepower Threat Defense 资源管理错误漏洞
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 (FTD)存在资源管理错误漏洞，该漏洞源于对 DNS 信誉强制规则处理不当。攻击者可利用该漏洞在受影响的设备上造成拒绝服务条件 (DoS)。
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-2022-20767

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III. Intelligence Information for CVE-2022-20767

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Vendor Advisories for CVE-2022-20767 (1)

Same Patch Batch · Cisco · 2022-05-03 · 19 CVEs total

CVE-2022-20759 8.8 HIGH Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Web Servi
CVE-2022-20746 8.6 HIGH Cisco Firepower Threat Defense Software TCP Proxy Denial of Service Vulnerability
CVE-2022-20715 8.6 HIGH Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Remote Ac
CVE-2022-20751 8.6 HIGH Cisco Firepower Threat Defense Software Snort Out of Memory Denial of Service Vulnerabilit
CVE-2022-20757 8.6 HIGH Cisco Firepower Threat Defense Software Denial of Service Vulnerability
CVE-2022-20760 8.6 HIGH Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software DNS Inspe
CVE-2022-20745 8.6 HIGH Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Web Servi
CVE-2022-20737 8.5 HIGH Cisco Adaptive Security Appliance Software Clientless SSL VPN Heap Overflow Vulnerability
CVE-2022-20742 7.4 HIGH Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software IPsec IKE
CVE-2022-20743 6.5 MEDIUM Cisco Firepower Management Center File Upload Security Bypass Vulnerability
CVE-2022-20740 6.1 MEDIUM Cisco Firepower Management Center Software Cross-Site Scripting Vulnerability
CVE-2022-20629 5.4 MEDIUM Cisco Firepower Management Center Software Cross-Site Scripting Vulnerabilities
CVE-2022-20628 5.4 MEDIUM Cisco Firepower Management Center Software Cross-Site Scripting Vulnerabilities
CVE-2022-20627 5.4 MEDIUM Cisco Firepower Management Center Software Cross-Site Scripting Vulnerabilities
CVE-2022-20748 5.3 MEDIUM Cisco Firepower Threat Defense Software Local Malware Analysis Denial of Service Vulnerabi
CVE-2022-20729 4.4 MEDIUM Cisco Firepower Threat Defense Software XML Injection Vulnerability
CVE-2022-20730 4.0 MEDIUM Cisco Firepower Threat Defense Software Security Intelligence DNS Feed Bypass Vulnerabilit
CVE-2022-20744 Cisco Firepower Management Center Software Information Disclosure Vulnerability

IV. Related Vulnerabilities

Same product: Cisco Firepower Threat Defense Software
Same vendor: Cisco
Same weakness: CWE-399

V. Comments for CVE-2022-20767

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