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CVE-2022-20823— Cisco NX-OS Software OSPFv3 Denial of Service Vulnerability

Quick assessment

Affected
Cisco Cisco NX-OS 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 NX-OS Software是美国思科（Cisco）公司的一套交换机使用的数据中心级操作系统软件。 Cisco NX-OS Software OSPFv3存在安全漏洞，该漏洞源于其对特定OSPFv3报文的输入验证不完全允许未经验证的远程攻击者重复发送恶意的OSPFv3链路状态通告（LSA）导致OSPFv3进程崩溃和重启，使受影响的设备重新加载实现拒绝服务。

CVSS 8.6 · High EPSS 1.10% · P64
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I. Basic Information for CVE-2022-20823

Vulnerability Information
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Vulnerability Title
Cisco NX-OS Software OSPFv3 Denial of Service Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the OSPF version 3 (OSPFv3) feature of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to incomplete input validation of specific OSPFv3 packets. An attacker could exploit this vulnerability by sending a malicious OSPFv3 link-state advertisement (LSA) to an affected device. A successful exploit could allow the attacker to cause the OSPFv3 process to crash and restart multiple times, causing the affected device to reload and resulting in a DoS condition. Note: The OSPFv3 feature is disabled by default. To exploit this vulnerability, an attacker must be able to establish a full OSPFv3 neighbor state with an affected device. For more information about exploitation conditions, see the Details section of this advisory.
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
缓冲区上溢读取
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco NX-OS Software 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco NX-OS Software是美国思科（Cisco）公司的一套交换机使用的数据中心级操作系统软件。 Cisco NX-OS Software OSPFv3存在安全漏洞，该漏洞源于其对特定OSPFv3报文的输入验证不完全允许未经验证的远程攻击者重复发送恶意的OSPFv3链路状态通告（LSA）导致OSPFv3进程崩溃和重启，使受影响的设备重新加载实现拒绝服务。
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 NX-OS Software n/a -

II. Public POCs for CVE-2022-20823

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III. Intelligence Information for CVE-2022-20823

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Vendor Advisories for CVE-2022-20823 (1)

Same Patch Batch · Cisco · 2022-08-25 · 4 CVEs total

CVE-2022-20921 8.8 HIGH Cisco ACI Multi-Site Orchestrator Privilege Escalation Vulnerability
CVE-2022-20824 8.8 HIGH Cisco FXOS and NX-OS Software Cisco Discovery Protocol Denial of Service and Arbitrary Cod
CVE-2022-20865 6.7 MEDIUM Cisco FXOS Software Command Injection Vulnerability

IV. Related Vulnerabilities

Same product: Cisco NX-OS Software
Same vendor: Cisco
Same weakness: CWE-126

V. Comments for CVE-2022-20823

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