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CVE-2019-1859— Cisco Small Business Switches Secure Shell Certificate Authentication Bypass Vulnerability

Quick assessment

Affected
Cisco Cisco Small Business 200 Series Smart 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.

多款Cisco产品中的Secure Shell (SSH)身份验证进程存在信任管理问题漏洞。该漏洞源于网络系统或产品中缺乏有效的信任管理机制。攻击者可利用默认密码或者硬编码密码、硬编码证书等攻击受影响组件。以下产品及版本受到影响：Cisco Small Business 200 Series Smart Switches 1.4.10.6之前版本；Small Business 300 Series Managed Switches 1.4.10.6之前版本；Small Business 500 Serie

AI Predicted 8.1 Difficulty: Easy EPSS 0.84% · P56
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I. Basic Information for CVE-2019-1859

Vulnerability Information
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Vulnerability Title
Cisco Small Business Switches Secure Shell Certificate Authentication Bypass Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the Secure Shell (SSH) authentication process of Cisco Small Business Switches software could allow an attacker to bypass client-side certificate authentication and revert to password authentication. The vulnerability exists because OpenSSH mishandles the authentication process. An attacker could exploit this vulnerability by attempting to connect to the device via SSH. A successful exploit could allow the attacker to access the configuration as an administrative user if the default credentials are not changed. There are no workarounds available; however, if client-side certificate authentication is enabled, disable it and use strong password authentication. Client-side certificate authentication is disabled by default.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
多款Cisco产品信任管理问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
多款Cisco产品中的Secure Shell (SSH)身份验证进程存在信任管理问题漏洞。该漏洞源于网络系统或产品中缺乏有效的信任管理机制。攻击者可利用默认密码或者硬编码密码、硬编码证书等攻击受影响组件。以下产品及版本受到影响：Cisco Small Business 200 Series Smart Switches 1.4.10.6之前版本；Small Business 300 Series Managed Switches 1.4.10.6之前版本；Small Business 500 Serie
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 200 Series Smart Switches unspecified ~ 1.4.10.6 -

II. Public POCs for CVE-2019-1859

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III. Intelligence Information for CVE-2019-1859

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Vendor Advisories for CVE-2019-1859 (1)

Same Patch Batch · Cisco · 2019-05-03 · 41 CVEs total

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CVE-2019-1699 Cisco Firepower Threat Defense Software Command Injection Vulnerability
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CVE-2019-1696 Cisco Firepower Threat Defense Software SMB Protocol Preprocessor Detection Engine Denial
CVE-2019-1693 Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software WebVPN De
CVE-2019-1687 Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software TCP Proxy
CVE-2019-1701 Cisco Adaptive Security Appliance and Firepower Threat Defense Software WebVPN Cross-Site
CVE-2019-1635 Cisco IP Phone 7800 Series and 8800 Series Session Initiation Protocol XML Denial of Servi
CVE-2019-1682 Cisco Application Policy Infrastructure Controller Privilege Escalation Vulnerability
CVE-2019-1589 Cisco Nexus 9000 Series Fabric Switches Application Centric Infrastructure Mode Unmeasured
CVE-2019-1590 Cisco Nexus 9000 Series Fabric Switches Application Centric Infrastructure Mode Insecure F
CVE-2019-1592 Cisco Nexus 9000 Series Fabric Switches Application Centric Infrastructure Mode Privilege
CVE-2018-15462 Cisco Firepower Threat Defense Software TCP Ingress Handler Denial of Service Vulnerabilit
CVE-2019-1586 Cisco Application Policy Infrastructure Controller Recoverable Encryption Key Vulnerabilit
CVE-2019-1587 Cisco Nexus 9000 Series Fabric Switches Application Centric Infrastructure Mode Filter Que
CVE-2018-15388 Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software WebVPN De

Showing top 20 of 41 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Cisco Small Business 200 Series Smart Switches
Same vendor: Cisco
Same weakness: CWE-285

V. Comments for CVE-2019-1859

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