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CVE-2019-1749— Cisco Aggregation Services Router 900 Route Switch Processor 3 OSPFv2 Denial of Service Vulnerability

Quick assessment

Affected
Cisco Cisco IOS XE 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 ASR 900是美国思科（Cisco）公司的一款900系列聚合服务路由器。Cisco IOS XE是一套为Cisco网络设备开发的操作系统。 Cisco ASR 900（Route Switch Processor 3 ）中的Cisco IOS XE存在输入验证漏洞，该漏洞源于程序没有充分地验证输入的流量。当设备配置有OSPFv2路由和OSPF Message Digest 5 (MD5)加密认证时，攻击者可通过发送畸形的OSPFv2消息利用该漏洞重新加载iosd进程，造成拒绝服务。

AI Predicted 7.5 Difficulty: Moderate EPSS 0.60% · P47

Possible ATT&CK Techniques 1 AI

T1218 · System Binary Proxy Execution
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I. Basic Information for CVE-2019-1749

Vulnerability Information
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Vulnerability Title
Cisco Aggregation Services Router 900 Route Switch Processor 3 OSPFv2 Denial of Service Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the ingress traffic validation of Cisco IOS XE Software for Cisco Aggregation Services Router (ASR) 900 Route Switch Processor 3 (RSP3) could allow an unauthenticated, adjacent attacker to trigger a reload of an affected device, resulting in a denial of service (DoS) condition. The vulnerability exists because the software insufficiently validates ingress traffic on the ASIC used on the RSP3 platform. An attacker could exploit this vulnerability by sending a malformed OSPF version 2 (OSPFv2) message to an affected device. A successful exploit could allow the attacker to cause a reload of the iosd process, triggering a reload of the affected device and resulting in a DoS condition.
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 ASR 900 Cisco IOS XE 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco ASR 900是美国思科（Cisco）公司的一款900系列聚合服务路由器。Cisco IOS XE是一套为Cisco网络设备开发的操作系统。 Cisco ASR 900（Route Switch Processor 3 ）中的Cisco IOS XE存在输入验证漏洞，该漏洞源于程序没有充分地验证输入的流量。当设备配置有OSPFv2路由和OSPF Message Digest 5 (MD5)加密认证时，攻击者可通过发送畸形的OSPFv2消息利用该漏洞重新加载iosd进程，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 XE Software 3.13.6aS -

II. Public POCs for CVE-2019-1749

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III. Intelligence Information for CVE-2019-1749

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Vendor Advisories for CVE-2019-1749 (2)

Same Patch Batch · Cisco · 2019-03-27 · 13 CVEs total

CVE-2019-1737 Cisco IOS and IOS XE Software IP Service Level Agreement Denial of Service Vulnerability
CVE-2019-1738 Cisco IOS and IOS XE Software Network-Based Application Recognition Denial of Service Vuln
CVE-2019-1739 Cisco IOS and IOS XE Software Network-Based Application Recognition Denial of Service Vuln
CVE-2019-1741 Cisco IOS XE Software Encrypted Traffic Analytics Denial of Service Vulnerability
CVE-2019-1740 Cisco IOS and IOS XE Software Network-Based Application Recognition Denial of Service Vuln
CVE-2019-1743 Cisco IOS XE Software Arbitrary File Upload Vulnerability
CVE-2019-1742 Cisco IOS XE Software Information Disclosure Vulnerability
CVE-2019-1745 Cisco IOS XE Software Command Injection Vulnerability
CVE-2019-1746 Cisco IOS and IOS XE Software Cluster Management Protocol Denial of Service Vulnerability
CVE-2019-1748 Cisco IOS and IOS XE Software Network Plug-and-Play Agent Certificate Validation Vulnerabi
CVE-2019-1747 Cisco IOS and IOS XE Software Short Message Service Denial of Service Vulnerability
CVE-2019-1750 Cisco IOS XE Software Catalyst 4500 Cisco Discovery Protocol Denial of Service Vulnerabili

IV. Related Vulnerabilities

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

V. Comments for CVE-2019-1749

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