CVE-2020-3363— Cisco Small Business Smart and Managed Switches Denial of Service Vulnerability
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I. Basic Information for CVE-2020-3363
Vulnerability Information
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Vulnerability Title
Cisco Small Business Smart and Managed Switches Denial of Service Vulnerability
Source: NVD (National Vulnerability Database)
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 an unexpected reboot of the switch, leading to a DoS condition. This vulnerability is specific to IPv6 traffic. IPv4 traffic is not affected.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
输入验证不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
多款Cisco产品输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco 250 Series Smart Switches等都是美国思科（Cisco）公司的产品。Cisco 250 Series Smart Switches是一款250系列智能交换机。Cisco 350 Series Managed Switches是一款350系列管理型交换机。550X Series Stackable Managed Switches是一款550X系列管理型交换机。 多款Cisco产品中的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所接收的IPv6流量
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-2020-3363
| # | POC Description | Source Link | Shenlong Link |
|---|
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- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sbss-ipv6-dos-3bLk6vAvendor-advisoryx_refsource_CISCO
- https://nvd.nist.gov/vuln/detail/CVE-2020-3363
Same Patch Batch · Cisco · 2020-08-17 · 17 CVEs total
| CVE-2020-3433 | 7.8 HIGH | Cisco AnyConnect Secure Mobility Client for Windows DLL Hijacking Vulnerability |
| CVE-2020-3500 | 6.8 MEDIUM | Cisco StarOS IPv6 Denial of Service Vulnerability |
| CVE-2020-3463 | 6.1 MEDIUM | Cisco Webex Meetings Reflected Cross-Site Scripting Vulnerability |
| CVE-2020-3346 | 6.1 MEDIUM | Cisco Unified Communications Manager Cross-Site Scripting Vulnerability |
| CVE-2020-3447 | 5.5 MEDIUM | Cisco Email Security Appliance and Cisco Content Security Management Appliance Information |
| CVE-2020-3435 | 5.5 MEDIUM | Cisco AnyConnect Secure Mobility Client for Windows Profile Modification Vulnerability |
| CVE-2020-3434 | 5.5 MEDIUM | Cisco AnyConnect Secure Mobility Client for Windows Denial of Service Vulnerability |
| CVE-2020-3472 | 5.0 MEDIUM | Cisco Webex Meetings User Email Address Information Disclosure Vulnerability |
| CVE-2020-3464 | 4.8 MEDIUM | Cisco UCS Director Stored Cross-Site Scripting Vulnerability |
| CVE-2020-3449 | 4.3 MEDIUM | Cisco IOS XR Software Additional Paths Denial of Service Vulnerability |
| CVE-2020-3413 | 4.3 MEDIUM | Cisco Webex Meetings Scheduled Meeting Template Deletion Vulnerability |
| CVE-2020-3412 | 4.3 MEDIUM | Cisco Webex Meetings Scheduled Meeting Template Creation Vulnerability |
| CVE-2020-3502 | 4.1 MEDIUM | Cisco Webex Meetings Desktop App Information Disclosure Vulnerabilities |
| CVE-2020-3501 | 4.1 MEDIUM | Cisco Webex Meetings Desktop App Information Disclosure Vulnerabilities |
| CVE-2020-3448 | Cisco Cyber Vision Center Software Access Control Bypass Vulnerability | |
| CVE-2020-3411 | Cisco DNA Center Information Disclosure Vulnerability |
IV. Related Vulnerabilities
Same vendor: Cisco
- CVE-2026-20219
Cisco Slido 安全漏洞 - CVE-2026-20034
Cisco Unity Connection Remote Code Execution Vulnerability - CVE-2026-20035
Cisco Unity Connection Server-Side Request Forgery Vulnerabi - CVE-2026-20167
Cisco IoT Field Network Director Remote Device Denial of Ser - CVE-2026-20169
Cisco IoT Field Network Director Command Injection Vulnerabi
Same weakness: CWE-20
V. Comments for CVE-2020-3363
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