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CVE-2020-3566— Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerability

Quick assessment

Affected
Cisco Cisco IOS XR Software
Exploitation
Confirmed exploitation in the wild; remediate immediately
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Cisco IOS和Cisco IOS XR都是美国思科（Cisco）公司的一套为其网络设备开发的操作系统。 Cisco IOS XR Software中的DVMRP存在安全漏洞，该漏洞源于Internet组管理协议（IGMP）数据包的队列管理不足造成的，攻击者可以通过向受影响的设备发送精心编制的IGMP数据包来进行攻击。

CVSS 8.6 · High KEV EPSS 3.70% · P89
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I. Basic Information for CVE-2020-3566

Vulnerability Information
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Vulnerability Title
Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the Distance Vector Multicast Routing Protocol (DVMRP) feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to exhaust process memory of an affected device. The vulnerability is due to insufficient queue management for Internet Group Management Protocol (IGMP) packets. An attacker could exploit this vulnerability by sending crafted IGMP traffic to an affected device. A successful exploit could allow the attacker to cause memory exhaustion, resulting in instability of other processes. These processes may include, but are not limited to, interior and exterior routing protocols. Cisco will release software updates that address this vulnerability.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco IOS和Cisco IOS XR 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco IOS和Cisco IOS XR都是美国思科（Cisco）公司的一套为其网络设备开发的操作系统。 Cisco IOS XR Software中的DVMRP存在安全漏洞，该漏洞源于Internet组管理协议（IGMP）数据包的队列管理不足造成的，攻击者可以通过向受影响的设备发送精心编制的IGMP数据包来进行攻击。
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)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
Cisco Cisco IOS XR Software n/a -

II. Public POCs for CVE-2020-3566

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III. Intelligence Information for CVE-2020-3566

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IV. Related Vulnerabilities

Same product: Cisco IOS XR Software
Same vendor: Cisco
Same weakness: CWE-400

V. Comments for CVE-2020-3566

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