Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2019-1890— Cisco Nexus 9000 Series Fabric Switches ACI Mode Fabric Infrastructure VLAN Unauthorized Access Vulnerability

Quick assessment

Affected
Cisco Cisco NX-OS System Software in ACI Mode 11.0.1b
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 9000 Series Fabric Switches是美国思科（Cisco）公司的一款9000系列光纤交换机。 Cisco Nexus 9000 Series Fabric Switches（处于ACI模式）中建立fabric infrastructure VLAN链接的过程存在访问控制错误漏洞。攻击者可通过在临近的子节点上向Cisco Nexus 9000 Series Switch发送恶意的LLDP数据包利用该漏洞绕过安全限制并将未授权的服务器连接到基础设施的VLAN。

AI Predicted 8.1 Difficulty: Moderate EPSS 0.63% · P49

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2019-1890

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Cisco Nexus 9000 Series Fabric Switches ACI Mode Fabric Infrastructure VLAN Unauthorized Access Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the fabric infrastructure VLAN connection establishment of the Cisco Nexus 9000 Series Application Centric Infrastructure (ACI) Mode Switch Software could allow an unauthenticated, adjacent attacker to bypass security validations and connect an unauthorized server to the infrastructure VLAN. The vulnerability is due to insufficient security requirements during the Link Layer Discovery Protocol (LLDP) setup phase of the infrastructure VLAN. An attacker could exploit this vulnerability by sending a malicious LLDP packet on the adjacent subnet to the Cisco Nexus 9000 Series Switch in ACI mode. A successful exploit could allow the attacker to connect an unauthorized server to the infrastructure VLAN, which is highly privileged. With a connection to the infrastructure VLAN, the attacker can make unauthorized connections to Cisco Application Policy Infrastructure Controller (APIC) services or join other host endpoints.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco Nexus 9000 Series Fabric Switches 访问控制错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco Nexus 9000 Series Fabric Switches是美国思科（Cisco）公司的一款9000系列光纤交换机。 Cisco Nexus 9000 Series Fabric Switches（处于ACI模式）中建立fabric infrastructure VLAN链接的过程存在访问控制错误漏洞。攻击者可通过在临近的子节点上向Cisco Nexus 9000 Series Switch发送恶意的LLDP数据包利用该漏洞绕过安全限制并将未授权的服务器连接到基础设施的VLAN。
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 System Software in ACI Mode 11.0.1b unspecified ~ 14.1(2g) -

II. Public POCs for CVE-2019-1890

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2019-1890

请登录查看更多情报信息。

Vendor Advisories for CVE-2019-1890 (2)

Same Patch Batch · Cisco · 2019-07-04 · 5 CVEs total

CVE-2019-1889 Cisco Application Policy Infrastructure Controller REST API Privilege Escalation Vulnerabi
CVE-2019-1855 Cisco Jabber for Windows DLL Preloading Vulnerability
CVE-2019-1884 Cisco Web Security Appliance Web Proxy Denial of Service Vulnerability
CVE-2019-1886 Cisco Web Security Appliance HTTPS Certificate Denial of Service Vulnerability

IV. Related Vulnerabilities

Same vendor: Cisco
Same weakness: CWE-284

V. Comments for CVE-2019-1890

No comments yet

Leave a comment