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CVE-2022-20679— Cisco IOS XE Software IPSec 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 IOS等都是美国思科（Cisco）公司的产品。Cisco IOS是一套为其网络设备开发的操作系统。IOS XE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。 Cisco IOS XE 存在输入验证错误漏洞，该漏洞源于攻击者可以通过 IPSec 导致 Cisco IOS XE 的致命错误，以触发拒绝服务。

CVSS 6.8 · Medium EPSS 1.31% · P70
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I. Basic Information for CVE-2022-20679

Vulnerability Information
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Vulnerability Title
Cisco IOS XE Software IPSec Denial of Service Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the IPSec decryption routine of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. This vulnerability is due to buffer exhaustion that occurs while traffic on a configured IPsec tunnel is being processed. An attacker could exploit this vulnerability by sending traffic to an affected device that has a maximum transmission unit (MTU) of 1800 bytes or greater. A successful exploit could allow the attacker to cause the device to reload. To exploit this vulnerability, the attacker may need access to the trusted network where the affected device is in order to send specific packets to be processed by the device. All network devices between the attacker and the affected device must support an MTU of 1800 bytes or greater. This access requirement could limit the possibility of a successful exploit.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
多款Cisco产品输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco IOS等都是美国思科（Cisco）公司的产品。Cisco IOS是一套为其网络设备开发的操作系统。IOS XE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。 Cisco IOS XE 存在输入验证错误漏洞，该漏洞源于攻击者可以通过 IPSec 导致 Cisco IOS XE 的致命错误，以触发拒绝服务。
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 n/a -

II. Public POCs for CVE-2022-20679

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III. Intelligence Information for CVE-2022-20679

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Vendor Advisories for CVE-2022-20679 (1)

Same Patch Batch · Cisco · 2022-04-15 · 34 CVEs total

CVE-2022-20695 10.0 CRITICAL Cisco Wireless LAN Controller Management Interface Authentication Bypass Vulnerability
CVE-2022-20622 8.6 HIGH Cisco Embedded Wireless Controller with Catalyst Access Points IP Flood Denial of Service
CVE-2022-20678 8.6 HIGH Cisco IOS XE Software AppNav-XE Denial of Service Vulnerability
CVE-2022-20714 8.6 HIGH Cisco IOS XR Software for ASR 9000 Series Routers Lightspeed-Plus Line Cards Denial of Ser
CVE-2022-20697 8.6 HIGH Cisco IOS and IOS XE Software Web Services Denial of Service Vulnerability
CVE-2022-20682 8.6 HIGH Cisco IOS XE Wireless Controller Software for the Catalyst 9000 Family CAPWAP Denial of Se
CVE-2022-20683 8.6 HIGH Cisco IOS XE Software for Catalyst 9800 Series Wireless Controllers Application Visibility
CVE-2022-20716 7.8 HIGH Cisco SD-WAN Solution Improper Access Control Vulnerability
CVE-2022-20681 7.8 HIGH Cisco IOS XE Software for Cisco Catalyst 9000 Family Switches and Catalyst 9000 Family Wir
CVE-2022-20692 7.7 HIGH Cisco IOS XE Software NETCONF Over SSH Denial of Service Vulnerability
CVE-2022-20684 7.4 HIGH Cisco IOS XE Wireless Controller Software for the Catalyst 9000 Family SNMP Trap Denial of
CVE-2022-20761 7.4 HIGH Cisco 1000 Series Connected Grid Router Integrated Wireless Access Point Denial of Service
CVE-2022-20739 7.3 HIGH Cisco SD-WAN vManage Software Privilege Escalation Vulnerability
CVE-2022-20694 6.8 MEDIUM Cisco IOS XE Software Border Gateway Protocol Resource Public Key Infrastructure Denial of
CVE-2022-20758 6.8 MEDIUM Cisco IOS XR Software Border Gateway Protocol Ethernet VPN Denial of Service Vulnerability
CVE-2022-20735 6.5 MEDIUM Cisco SD-WAN vManage Software Cross-Site Request Forgery Vulnerability
CVE-2022-20747 6.5 MEDIUM Cisco SD-WAN vManage Software Information Disclosure Vulnerability
CVE-2022-20726 5.5 MEDIUM Cisco IOx Application Hosting Environment Vulnerabilities
CVE-2022-20718 5.5 MEDIUM Cisco IOx Application Hosting Environment Vulnerabilities
CVE-2022-20725 5.5 MEDIUM Cisco IOx Application Hosting Environment Vulnerabilities

Showing top 20 of 34 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

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

V. Comments for CVE-2022-20679

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