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CVE-2022-20920— Cisco IOS and IOS XE Software SSH Denial of Service Vulnerability

Quick assessment

Affected
Cisco Cisco IOS
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和Cisco IOS XE Software都是美国思科（Cisco）公司的产品。Cisco IOS是一套为其网络设备开发的操作系统。Cisco IOS XE Software是一个操作系统。用于企业有线和无线访问，汇聚，核心和WAN的单一操作系统，Cisco IOS XE降低了业务和网络的复杂性。 Cisco IOS Software 和 Cisco IOS XE Software存在安全漏洞，该漏洞源于在异常情况下对资源处理不当。

CVSS 7.7 · High EPSS 0.87% · P57

Affected Version Matrix 1

VendorProduct Version RangeStatus
Cisco Cisco IOS n/a affected
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I. Basic Information for CVE-2022-20920

Vulnerability Information
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Vulnerability Title
Cisco IOS and IOS XE Software SSH Denial of Service Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the SSH implementation of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, remote attacker to cause an affected device to reload. This vulnerability is due to improper handling of resources during an exceptional situation. An attacker could exploit this vulnerability by continuously connecting to an affected device and sending specific SSH requests. A successful exploit could allow the attacker to cause the affected device to reload.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对异常条件的处理不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco IOS和Cisco IOS XE Software 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco IOS和Cisco IOS XE Software都是美国思科（Cisco）公司的产品。Cisco IOS是一套为其网络设备开发的操作系统。Cisco IOS XE Software是一个操作系统。用于企业有线和无线访问，汇聚，核心和WAN的单一操作系统，Cisco IOS XE降低了业务和网络的复杂性。 Cisco IOS Software 和 Cisco IOS XE Software存在安全漏洞，该漏洞源于在异常情况下对资源处理不当。
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 n/a -

II. Public POCs for CVE-2022-20920

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III. Intelligence Information for CVE-2022-20920

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Vendor Advisories for CVE-2022-20920 (1)

Same Patch Batch · Cisco · 2022-10-10 · 7 CVEs total

CVE-2022-20837 8.6 HIGH Cisco IOS XE Software DNS NAT Protocol Application Layer Gateway Denial of Service Vulnera
CVE-2022-20870 8.6 HIGH Cisco IOS XE Software for Catalyst Switches MPLS Denial of Service Vulnerability
CVE-2022-20915 7.4 HIGH Cisco IOS XE Software IPv6 VPN over MPLS Denial of Service Vulnerability
CVE-2022-20944 6.1 MEDIUM Cisco IOS XE Software for Catalyst 9200 Series Switches Arbitrary Code Execution Vulnerabi
CVE-2022-20830 5.3 MEDIUM Cisco Software-Defined Application Visibility and Control on Cisco vManage Authentication
CVE-2022-20864 4.6 MEDIUM Cisco IOS XE ROM Monitor Software for Catalyst Switches Information Disclosure Vulnerabili

IV. Related Vulnerabilities

Same product: Cisco IOS
Same vendor: Cisco
Same weakness: CWE-755

V. Comments for CVE-2022-20920

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