CVE-2019-1977— Cisco Nexus 9000 Series Fabric Switches ACI Mode Border Leaf Endpoint Learning Vulnerability
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I. Basic Information for CVE-2019-1977
Vulnerability Information
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Vulnerability Title
Cisco Nexus 9000 Series Fabric Switches ACI Mode Border Leaf Endpoint Learning Vulnerability
Source: NVD (National Vulnerability Database)
Vulnerability Description
A vulnerability within the Endpoint Learning feature of Cisco Nexus 9000 Series Switches running in Application Centric Infrastructure (ACI) mode could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an endpoint device in certain circumstances. The vulnerability is due to improper endpoint learning when packets are received on a specific port from outside the ACI fabric and destined to an endpoint located on a border leaf when Disable Remote Endpoint Learning has been enabled. This can result in a Remote (XR) entry being created for the impacted endpoint that will become stale if the endpoint migrates to a different port or leaf switch. This results in traffic not reaching the impacted endpoint until the Remote entry can be relearned by another mechanism.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
状态问题
Source: NVD (National Vulnerability Database)
Vulnerability Title
Cisco Nexus 9000 Series Switches NX-OS ACI Software 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco Nexus 9000 Series Switches是美国思科（Cisco）公司的一款9000系列交换机。NX-OS ACI Software是运行在其中一套使用在Cisco网络设备中的操作系统。 Cisco Nexus 9000 Series Switches（运行在Application Centric Infrastructure模式下）中的NX-OS ACI Software 12.2(4M)之前版本、13.1(2u)之前版本和13.2(1l)之前版本存在安全漏洞，该漏洞。远程攻击者可
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 Nexus 9000 Series Fabric Switches in ACI | unspecified ~ 12.2(4M) | - |
II. Public POCs for CVE-2019-1977
| # | POC Description | Source Link | Shenlong Link |
|---|
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- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190828-nexus-aci-dosvendor-advisoryx_refsource_CISCO
- https://nvd.nist.gov/vuln/detail/CVE-2019-1977
Same Patch Batch · Cisco · 2019-08-29 · 5 CVEs total
| CVE-2019-1967 | Cisco NX-OS Software Network Time Protocol Denial of Service Vulnerability | |
| CVE-2019-1966 | Cisco Unified Computing System Fabric Interconnect root Privilege Escalation Vulnerability | |
| CVE-2019-1969 | Cisco NX-OS Software SNMP Access Control List Configuration Name Bypass Vulnerability | |
| CVE-2019-1968 | Cisco NX-OS Software NX-API Denial of Service Vulnerability |
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V. Comments for CVE-2019-1977
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