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CVE-2020-3496— Cisco Small Business Smart and Managed Switches Denial of Service Vulnerability

Quick assessment

Affected
Cisco Cisco Small Business 250 Series Smart Switches 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 Small Business Smart和Cisco Managed Switches都是思科（Cisco）的产品。Cisco Small Business Smart是一个小型交换机。Cisco Managed Switches是一个管理型交换机。 Cisco Small Business Smart and Managed Switches中的IPv6数据包处理引擎存在输入验证错误漏洞，该漏洞源于程序没有充分验证接收的IPv6流量。远程攻击者可通过发送特制的IPv6数据包利用该漏洞造成拒绝

AI Predicted 7.5 Difficulty: Easy EPSS 1.74% · P76

Possible ATT&CK Techniques 1 AI

T1499.002 · Service Exhaustion Flood
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I. Basic Information for CVE-2020-3496

Vulnerability Information
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Vulnerability Title
Cisco Small Business Smart and Managed Switches Denial of Service Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the IPv6 packet processing engine of Cisco Small Business Smart and Managed Switches could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to insufficient validation of incoming IPv6 traffic. An attacker could exploit this vulnerability by sending a crafted IPv6 packet through an affected device. A successful exploit could allow the attacker to cause the switch management CLI to stop responding, resulting in a DoS condition. This vulnerability is specific to IPv6 traffic. IPv4 traffic is not affected.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco Small Business Smart and Managed Switches IPv6数据包处理引擎输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco Small Business Smart和Cisco Managed Switches都是思科（Cisco）的产品。Cisco Small Business Smart是一个小型交换机。Cisco Managed Switches是一个管理型交换机。 Cisco Small Business Smart and Managed Switches中的IPv6数据包处理引擎存在输入验证错误漏洞，该漏洞源于程序没有充分验证接收的IPv6流量。远程攻击者可通过发送特制的IPv6数据包利用该漏洞造成拒绝
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 Small Business 250 Series Smart Switches Software n/a -

II. Public POCs for CVE-2020-3496

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III. Intelligence Information for CVE-2020-3496

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Vendor Advisories for CVE-2020-3496 (1)

Same Patch Batch · Cisco · 2020-08-26 · 22 CVEs total

CVE-2020-3507 8.8 HIGH Cisco Video Surveillance 8000 Series IP Cameras Cisco Discovery Protocol Remote Code Execu
CVE-2020-3443 8.8 HIGH Cisco Smart Software Manager On-Prem Privilege Escalation Vulnerability
CVE-2020-3506 8.8 HIGH Cisco Video Surveillance 8000 Series IP Cameras Cisco Discovery Protocol Remote Code Execu
CVE-2020-3523 6.5 MEDIUM Cisco Data Center Network Manager Cross-Site Scripting Vulnerability
CVE-2020-3518 6.5 MEDIUM Cisco Data Center Network Manager Cross-Site Scripting Vulnerability
CVE-2020-3505 6.5 MEDIUM Cisco Video Surveillance 8000 Series IP Cameras Cisco Discovery Protocol Memory Leak Vulne
CVE-2020-3485 6.3 MEDIUM Cisco Vision Dynamic Signage Director Role-Based Access Control Vulnerability
CVE-2020-3522 6.3 MEDIUM Cisco Data Center Network Manager Authorization Bypass Vulnerability
CVE-2020-3491 5.5 MEDIUM Cisco Vision Dynamic Signage Director Stored Cross-Site Scripting Vulnerability
CVE-2020-3520 5.5 MEDIUM Cisco Data Center Network Manager Information Disclosure Vulnerability
CVE-2020-3484 5.3 MEDIUM Cisco Vision Dynamic Signage Director Directory Traversal Information Disclosure Vulnerabi
CVE-2020-3521 5.3 MEDIUM Cisco Data Center Network Manager Read File Path Traversal Vulnerability
CVE-2020-3490 4.9 MEDIUM Cisco Vision Dynamic Signage Director Path Traversal Vulnerability
CVE-2020-3151 Cisco Connected Mobile Experiences Restricted Shell Escape Vulnerability
CVE-2020-3466 Cisco DNA Center Cross-Site Scripting Vulnerabilities
CVE-2020-3446 Cisco vWAAS for Cisco ENCS 5400-W Series and CSP 5000-W Series Default Credentials Vulnera
CVE-2020-3440 Cisco Webex Meetings Desktop App for Windows Arbitrary File Overwrite Vulnerability
CVE-2020-3439 Cisco Data Center Network Manager Stored Cross-Site Scripting Vulnerability
CVE-2020-3519 Cisco Data Center Network Manager Path Traversal Vulnerability
CVE-2020-3389 Cisco Hyperflex HX-Series Software Weak Storage Vulnerability

Showing top 20 of 22 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Cisco Small Business 250 Series Smart Switches Software
Same vendor: Cisco
Same weakness: CWE-20

V. Comments for CVE-2020-3496

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