CVE-2020-3168— Cisco Nexus 1000V Switch for VMware vSphere Secure Login Enhancements Denial of Service Vulnerability
Quick assessment
Affected
Cisco Cisco NX-OS 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 Nexus 1000V Series Switches是美国思科（Cisco）公司的一款1000V系列的交换机设备。 Cisco Nexus 1000V Switch for VMware vSphere（运行NX-OS Software Release 5.2(1)SV3(4.1a)并配置有登录参数）中的Secure Login Enhancements功能存在资源管理错误漏洞，该漏洞源于在CLI登录失败过程中，程序没有正确分配资源。远程攻击者可借助大量的登录请求利用该漏洞造成拒绝服务。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2020-3168
Vulnerability Information
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Vulnerability Title
Cisco Nexus 1000V Switch for VMware vSphere Secure Login Enhancements Denial of Service Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the Secure Login Enhancements capability of Cisco Nexus 1000V Switch for VMware vSphere could allow an unauthenticated, remote attacker to cause an affected Nexus 1000V Virtual Supervisor Module (VSM) to become inaccessible to users through the CLI. The vulnerability is due to improper resource allocation during failed CLI login attempts when login parameters that are part of the Secure Login Enhancements capability are configured on an affected device. An attacker could exploit this vulnerability by performing a high amount of login attempts against the affected device. A successful exploit could cause the affected device to become inaccessible to other users, resulting in a denial of service (DoS) condition requiring a manual power cycle of the VSM to recover.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
资源管理错误
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco Nexus 1000V Switch for VMware vSphere 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco Nexus 1000V Series Switches是美国思科（Cisco）公司的一款1000V系列的交换机设备。 Cisco Nexus 1000V Switch for VMware vSphere（运行NX-OS Software Release 5.2(1)SV3(4.1a)并配置有登录参数）中的Secure Login Enhancements功能存在资源管理错误漏洞，该漏洞源于在CLI登录失败过程中，程序没有正确分配资源。远程攻击者可借助大量的登录请求利用该漏洞造成拒绝服务。
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 NX-OS Software | unspecified ~ n/a | - |
|
II. Public POCs for CVE-2020-3168
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2020-3168 (1)
-
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200226-nexus-1000v-dos vendor-advisory x_refsource_CISCO
Same Patch Batch · Cisco · 2020-02-26 · 11 CVEs total
| CVE-2020-3165 | Cisco NX-OS Software Border Gateway Protocol MD5 Authentication Bypass Vulnerability | |
| CVE-2020-3175 | Cisco MDS 9000 Series Multilayer Switches Denial of Service Vulnerability | |
| CVE-2020-3174 | Cisco NX-OS Software Anycast Gateway Invalid ARP Vulnerability | |
| CVE-2020-3173 | Cisco UCS Manager Software Local Management CLI Command Injection Vulnerability | |
| CVE-2020-3172 | Cisco FXOS and NX-OS Software Cisco Discovery Protocol Arbitrary Code Execution and Denial | |
| CVE-2020-3171 | Cisco FXOS and UCS Manager Software Local Management CLI Command Injection Vulnerability | |
| CVE-2020-3170 | Cisco NX-OS Software NX-API Denial of Service Vulnerability | |
| CVE-2020-3169 | Cisco FXOS Software CLI Command Injection Vulnerability | |
| CVE-2020-3167 | Cisco FXOS and UCS Manager Software CLI Command Injection Vulnerability | |
| CVE-2020-3166 | Cisco FXOS Software CLI Arbitrary File Read and Write Vulnerability |
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V. Comments for CVE-2020-3168
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