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CVE-2019-1967— Cisco NX-OS Software Network Time Protocol 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 NX-OS Software是美国思科（Cisco）公司的一套交换机使用的数据中心级操作系统软件。 Cisco NX-OS Software中的Network Time Protocol (NTP)功能存在资源管理错误漏洞。远程攻击者可借助Mode 7 NTP数据包洪泛该设备利用该漏洞造成拒绝服务。以下产品及版本受到影响：Cisco MDS 9000 Series Multilayer Switches；Nexus 3000 Series Switches；Nexus 3500 Platfor

AI Predicted 7.5 Difficulty: Easy EPSS 1.99% · P80
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I. Basic Information for CVE-2019-1967

Vulnerability Information
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Vulnerability Title
Cisco NX-OS Software Network Time Protocol Denial of Service Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the Network Time Protocol (NTP) feature of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to excessive use of system resources when the affected device is logging a drop action for received MODE_PRIVATE (Mode 7) NTP packets. An attacker could exploit this vulnerability by flooding the device with a steady stream of Mode 7 NTP packets. A successful exploit could allow the attacker to cause high CPU and memory usage on the affected device, which could cause internal system processes to restart or cause the affected device to unexpectedly reload. Note: The NTP feature is enabled by default.
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 NX-OS Software 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco NX-OS Software是美国思科（Cisco）公司的一套交换机使用的数据中心级操作系统软件。 Cisco NX-OS Software中的Network Time Protocol (NTP)功能存在资源管理错误漏洞。远程攻击者可借助Mode 7 NTP数据包洪泛该设备利用该漏洞造成拒绝服务。以下产品及版本受到影响：Cisco MDS 9000 Series Multilayer Switches；Nexus 3000 Series Switches；Nexus 3500 Platfor
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 ~ 8.3(2) -

II. Public POCs for CVE-2019-1967

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III. Intelligence Information for CVE-2019-1967

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Vendor Advisories for CVE-2019-1967 (1)

Same Patch Batch · Cisco · 2019-08-29 · 5 CVEs total

CVE-2019-1966 Cisco Unified Computing System Fabric Interconnect root Privilege Escalation Vulnerability
CVE-2019-1977 Cisco Nexus 9000 Series Fabric Switches ACI Mode Border Leaf Endpoint Learning Vulnerabili
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

IV. Related Vulnerabilities

Same product: Cisco NX-OS Software
Same vendor: Cisco
Same weakness: CWE-399

V. Comments for CVE-2019-1967

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