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CVE-2019-16027— Cisco IOS XR Software Intermediate System–to–Intermediate System Denial of Service 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（配置有SNMP 1版本、2c版本或3版本）中(IS-IS)路由协议的实现存在输入验证错误漏洞，该漏洞源于IS-IS进程没有正确处理SNMP请求。远程攻击者可借助特制的SNMP请求利用该漏洞造成拒绝服务。以下产品及版本受到影响：Cisco IOS XR 6.6.3之前版本，7.0.2之前版本，7.1.1之前版本，7.2.1之前版本。

AI Predicted 5.9 Difficulty: Easy EPSS 1.51% · P73
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I. Basic Information for CVE-2019-16027

Vulnerability Information
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Vulnerability Title
Cisco IOS XR Software Intermediate System–to–Intermediate System Denial of Service Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the implementation of the Intermediate System–to–Intermediate System (IS–IS) routing protocol functionality in Cisco IOS XR Software could allow an authenticated, remote attacker to cause a denial of service (DoS) condition in the IS–IS process. The vulnerability is due to improper handling of a Simple Network Management Protocol (SNMP) request for specific Object Identifiers (OIDs) by the IS–IS process. An attacker could exploit this vulnerability by sending a crafted SNMP request to the affected device. A successful exploit could allow the attacker to cause a DoS condition in the IS–IS process.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco IOS XR 输入验证错误漏洞
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（配置有SNMP 1版本、2c版本或3版本）中(IS-IS)路由协议的实现存在输入验证错误漏洞，该漏洞源于IS-IS进程没有正确处理SNMP请求。远程攻击者可借助特制的SNMP请求利用该漏洞造成拒绝服务。以下产品及版本受到影响：Cisco IOS XR 6.6.3之前版本，7.0.2之前版本，7.1.1之前版本，7.2.1之前版本。
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 ~ n/a -

II. Public POCs for CVE-2019-16027

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III. Intelligence Information for CVE-2019-16027

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Vendor Advisories for CVE-2019-16027 (1)

Same Patch Batch · Cisco · 2020-01-26 · 24 CVEs total

CVE-2020-3129 Cisco Unity Connection Stored Cross-Site Scripting Vulnerability
CVE-2019-12629 Cisco SD-WAN vManage Command Injection Vulnerability
CVE-2019-12619 Cisco SD-WAN Solution SQL Injection Vulnerability
CVE-2020-3136 Cisco Jabber Guest Cross-Site Scripting Vulnerability
CVE-2020-3139 Cisco Application Policy Infrastructure Controller Out Of Band Management IP Tables Bypass
CVE-2019-15989 Cisco IOS XR Software Border Gateway Protocol Attribute Denial of Service Vulnerability
CVE-2019-16018 Cisco IOS XR Software EVPN Operational Routes Denial of Service Vulnerability
CVE-2019-16020 Cisco IOS XR Software BGP EVPN Denial of Service Vulnerabilities
CVE-2019-16022 Cisco IOS XR Software BGP EVPN Denial of Service Vulnerabilities
CVE-2019-16029 Cisco Smart Software Manager On-Prem Web Interface Denial of Service Vulnerability
CVE-2020-3115 Cisco SD-WAN Solution Local Privilege Escalation Vulnerability
CVE-2020-3121 Cisco Small Business Smart and Managed Switches Cross-Site Scripting Vulnerability
CVE-2020-3142 Cisco Webex Meetings Suite and Cisco Webex Meetings Online Unauthenticated Meeting Join Vu
CVE-2020-3131 Cisco Webex Teams Adaptive Cards Denial of Service Vulnerability
CVE-2020-3134 Cisco Email Security Appliance Zip Decompression Engine Denial of Service Vulnerability
CVE-2019-16015 Cisco Data Center Analytics Framework Cross-Site Scripting Vulnerability
CVE-2019-15255 Cisco Identity Services Engine Authorization Bypass Vulnerability
CVE-2019-16026 Cisco Mobility Management Entity Denial of Service Vulnerability
CVE-2019-16024 Cisco Crosswork Change Automation Cross-Site Scripting Vulnerability
CVE-2019-16008 Cisco IP Phone 6800, 7800, and 8800 Series with Multiplatform Firmware Cross-Site Scriptin

Showing top 20 of 24 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Cisco IOS XR Software
Same vendor: Cisco
Same weakness: CWE-20

V. Comments for CVE-2019-16027

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