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CVE-2019-1814— Cisco Small Business 300 Series Managed Switches DHCP Denial of Service Vulnerability

Quick assessment

Affected
Cisco Cisco Small Business 300 Series Managed Switches
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 Small Business 300 Series是美国思科（Cisco）公司的一款企业级管理型交换机。 Cisco Small Business 300 Series中DHCP和TFTP功能之间的交互存在资源管理错误漏洞。该漏洞源于网络系统或产品对系统资源（如内存、磁盘空间、文件等）的管理不当。

AI Predicted 7.5 Difficulty: Easy EPSS 2.12% · P81
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I. Basic Information for CVE-2019-1814

Vulnerability Information
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Vulnerability Title
Cisco Small Business 300 Series Managed Switches DHCP Denial of Service Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the interactions between the DHCP and TFTP features for Cisco Small Business 300 Series (Sx300) Managed Switches could allow an unauthenticated, remote attacker to cause the device to become low on system memory, which in turn could lead to an unexpected reload of the device and result in a denial of service (DoS) condition on an affected device. The vulnerability is due to a failure to free system memory when an unexpected DHCP request is received. An attacker could exploit this vulnerability by sending a crafted DHCP packet to the targeted device. A successful exploit could allow the attacker to cause an unexpected reload of the device.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco Small Business 300 Series 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco Small Business 300 Series是美国思科（Cisco）公司的一款企业级管理型交换机。 Cisco Small Business 300 Series中DHCP和TFTP功能之间的交互存在资源管理错误漏洞。该漏洞源于网络系统或产品对系统资源（如内存、磁盘空间、文件等）的管理不当。
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 300 Series Managed Switches 1.4.0.88 -

II. Public POCs for CVE-2019-1814

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III. Intelligence Information for CVE-2019-1814

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Vendor Advisories for CVE-2019-1814 (2)

Same Patch Batch · Cisco · 2019-05-15 · 36 CVEs total

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CVE-2019-1771 Cisco Webex Network Recording Player Arbitrary Code Execution Vulnerability
CVE-2019-1735 Cisco NX-OS Software Command Injection Vulnerability (CVE-2019-1735)
CVE-2019-1767 Cisco NX-OS Software Buffer Overflow and Command Injection Vulnerability
CVE-2019-1775 Cisco NX-OS Software Command Injection Vulnerability
CVE-2019-1731 Cisco NX-OS Software SSH Key Information Disclosure Vulnerability
CVE-2019-1732 Cisco NX-OS Software Remote Package Manager Command Injection Vulnerability
CVE-2019-1733 Cisco NX-OS Software NX-API Sandbox Cross-Site Scripting Vulnerability
CVE-2019-1727 Cisco NX-OS Software Python Parser Privilege Escalation Vulnerability
CVE-2019-1728 Cisco FXOS and NX-OS Software Secure Configuration Bypass Vulnerability
CVE-2019-1729 Cisco NX-OS Software Arbitrary File Overwrite Vulnerability
CVE-2019-1726 Cisco NX-OS Software CLI Bypass to Internal Service Vulnerability
CVE-2019-1717 Cisco Video Surveillance Manager Web-Based Management Interface Information Disclosure Vul
CVE-2019-1783 Cisco NX-OS Software Command Injection Vulnerability
CVE-2019-1812 Cisco NX-OS CLI Command Software Image Signature Verification Vulnerabilities

Showing top 20 of 36 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Cisco Small Business 300 Series Managed Switches
Same vendor: Cisco
Same weakness: CWE-400

V. Comments for CVE-2019-1814

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