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CVE-2019-1842— Cisco IOS XR Software Secure Shell Authentication Vulnerability

Quick assessment

Affected
Cisco Cisco IOS XR 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 IOS XR是美国思科（Cisco）公司的一套为其网络设备开发的操作系统。 Cisco IOS XR中的Secure Shell (SSH)身份验证功能存在授权问题漏洞。该漏洞源于网络系统或产品中缺少身份验证措施或身份验证强度不足。

AI Predicted 6.5 Difficulty: Moderate EPSS 1.19% · P67
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I. Basic Information for CVE-2019-1842

Vulnerability Information
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Vulnerability Title
Cisco IOS XR Software Secure Shell Authentication Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the Secure Shell (SSH) authentication function of Cisco IOS XR Software could allow an authenticated, remote attacker to successfully log in to an affected device using two distinct usernames. The vulnerability is due to a logic error that may occur when certain sequences of actions are processed during an SSH login event on the affected device. An attacker could exploit this vulnerability by initiating an SSH session to the device with a specific sequence that presents the two usernames. A successful exploit could result in logging data misrepresentation, user enumeration, or, in certain circumstances, a command authorization bypass. See the Details section for more information.
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
Cisco IOS XR 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco IOS XR是美国思科（Cisco）公司的一套为其网络设备开发的操作系统。 Cisco IOS XR中的Secure Shell (SSH)身份验证功能存在授权问题漏洞。该漏洞源于网络系统或产品中缺少身份验证措施或身份验证强度不足。
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 IOS XR Software unspecified ~ 6.1.4 -

II. Public POCs for CVE-2019-1842

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III. Intelligence Information for CVE-2019-1842

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Vendor Advisories for CVE-2019-1842 (2)

Same Patch Batch · Cisco · 2019-06-05 · 9 CVEs total

CVE-2019-1881 Cisco Industrial Network Director Cross-Site Request Forgery Vulnerability
CVE-2019-1882 Cisco Industrial Network Director Stored Cross-Site Scripting Vulnerability
CVE-2019-1870 Cisco Enterprise Chat and Email Cross-Site Scripting Vulnerability
CVE-2019-1872 Cisco TelePresence Video Communication Server and Cisco Expressway Series Server-Side Requ
CVE-2019-1880 Cisco Unified Computing System BIOS Signature Bypass Vulnerability
CVE-2019-1845 Cisco Unified Communications Manager IM&P Service, Cisco TelePresence VCS, and Cisco Expre
CVE-2019-1861 Cisco Industrial Network Director Remote Code Execution Vulnerability
CVE-2019-1868 Cisco Webex Meetings Server Information Disclosure Vulnerability

IV. Related Vulnerabilities

Same product: Cisco IOS XR Software
Same vendor: Cisco
Same weakness: CWE-285

V. Comments for CVE-2019-1842

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