CVE-2019-1910— Cisco IOS XR Software Intermediate System to Intermediate System Denial of Service Vulnerability
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I. Basic Information for CVE-2019-1910
Vulnerability Information
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Vulnerability Title
Cisco IOS XR Software Intermediate System to Intermediate System Denial of Service Vulnerability
Source: NVD (National Vulnerability Database)
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 unauthenticated attacker who is in the same IS–IS area to cause a denial of service (DoS) condition. The vulnerability is due to incorrect processing of crafted IS–IS link-state protocol data units (PDUs). An attacker could exploit this vulnerability by sending a crafted link-state PDU to an affected system to be processed. A successful exploit could allow the attacker to cause all routers within the IS–IS area to unexpectedly restart the IS–IS process, resulting in a DoS condition. This vulnerability affects Cisco devices if they are running a vulnerable release of Cisco IOS XR Software earlier than Release 6.6.3 and are configured with the IS–IS routing protocol. Cisco has confirmed that this vulnerability affects both Cisco IOS XR 32-bit Software and Cisco IOS XR 64-bit Software.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
输入验证不恰当
Source: NVD (National Vulnerability Database)
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 6.6.3之前版本中的中间系统到中间系统（IS–IS）路由协议功能存在输入验证错误漏洞，该漏洞源于程序没有正确处理特制的链路状态协议数据单元（PDUs）。攻击者可通过发送特制的链路状态协议数据单元利用该漏洞造成拒绝服务。
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 ~ 6.6.3 | - |
II. Public POCs for CVE-2019-1910
| # | POC Description | Source Link | Shenlong Link |
|---|
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- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190807-iosxr-isis-dos-1910vendor-advisoryx_refsource_CISCO
- https://nvd.nist.gov/vuln/detail/CVE-2019-1910
Same Patch Batch · Cisco · 2019-08-07 · 15 CVEs total
| CVE-2019-1945 | Cisco Adaptive Security Appliance Smart Tunnel Vulnerabilities | |
| CVE-2019-1928 | Cisco Webex Network Recording Player and Cisco Webex Player Arbitrary Code Execution Vulne | |
| CVE-2019-1929 | Cisco Webex Network Recording Player and Cisco Webex Player Arbitrary Code Execution Vulne | |
| CVE-2019-1934 | Cisco Adaptive Security Appliance Software Web-Based Management Interface Privilege Escala | |
| CVE-2019-1944 | Cisco Adaptive Security Appliance Smart Tunnel Vulnerabilities | |
| CVE-2019-1926 | Cisco Webex Network Recording Player and Cisco Webex Player Arbitrary Code Execution Vulne | |
| CVE-2019-1927 | Cisco Webex Network Recording Player and Cisco Webex Player Arbitrary Code Execution Vulne | |
| CVE-2019-1918 | Cisco IOS XR Software Intermediate System–to–Intermediate System Denial of Service Vulnera | |
| CVE-2019-1924 | Cisco Webex Network Recording Player and Cisco Webex Player Arbitrary Code Execution Vulne | |
| CVE-2019-1925 | Cisco Webex Network Recording Player and Cisco Webex Player Arbitrary Code Execution Vulne | |
| CVE-2019-1895 | Cisco Enterprise NFV Infrastructure Software VNC Authentication Bypass Vulnerability | |
| CVE-2019-1913 | Cisco Small Business 220 Series Smart Switches Remote Code Execution Vulnerabilities | |
| CVE-2019-1914 | Cisco Small Business 220 Series Smart Switches Command Injection Vulnerability | |
| CVE-2019-1912 | Cisco Small Business 220 Series Smart Switches Authentication Bypass Vulnerability |
IV. Related Vulnerabilities
Same product: Cisco IOS XR Software
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Cisco IOS XR Software CLI Privilege Escalation Vulnerability - CVE-2026-20074
Cisco IOS XR Software Multi-Instance Intermediate System-to- - CVE-2026-20040
Cisco IOS XR Software CLI Privilege Escalation Vulnerability - CVE-2025-20340
Cisco IOS XR Address Resolution Protocol Broadcast Storm Vul
Same vendor: Cisco
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Cisco Unity Connection Server-Side Request Forgery Vulnerabi - CVE-2026-20167
Cisco IoT Field Network Director Remote Device Denial of Ser - CVE-2026-20169
Cisco IoT Field Network Director Command Injection Vulnerabi
Same weakness: CWE-20
V. Comments for CVE-2019-1910
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