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CVE-2022-20751— Cisco Firepower Threat Defense Software Snort Out of Memory 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) 存在安全漏洞，该漏洞源于某些 Snort 事件的内存管理不足。攻击者可以通过发送一系列精心设计的 IP 数据包来导致受影响设备出现内存不足的情况，从而导致 DoS。

CVSS 8.6 · High EPSS 1.35% · P70
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I. Basic Information for CVE-2022-20751

Vulnerability Information
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Vulnerability Title
Cisco Firepower Threat Defense Software Snort Out of Memory Denial of Service Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the Snort detection engine integration for Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause unlimited memory consumption, which could lead to a denial of service (DoS) condition on an affected device. This vulnerability is due to insufficient memory management for certain Snort events. An attacker could exploit this vulnerability by sending a series of crafted IP packets that would generate specific Snort events on an affected device. A sustained attack could cause an out of memory condition on the affected device. A successful exploit could allow the attacker to interrupt all traffic flowing through the affected device. In some circumstances, the attacker may be able to cause the device to reload, resulting in a DoS condition.
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
不加限制或调节的资源分配
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco Firepower Threat Defense 安全漏洞
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) 存在安全漏洞，该漏洞源于某些 Snort 事件的内存管理不足。攻击者可以通过发送一系列精心设计的 IP 数据包来导致受影响设备出现内存不足的情况，从而导致 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-2022-20751

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III. Intelligence Information for CVE-2022-20751

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Vendor Advisories for CVE-2022-20751 (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-2022-20757 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-2022-20767 8.6 HIGH Cisco Firepower Threat Defense Software DNS Enforcement Denial of Service Vulnerability
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-770

V. Comments for CVE-2022-20751

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