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CVE-2023-20168

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存在安全漏洞，该漏洞源于TACACS+和RADIUS的身份验证过程存在安全漏洞。攻击者可利用该漏洞通过在登录提示符下输入特制的字符串来导致系统拒绝服务（DoS）。

CVSS 7.1 · High EPSS 0.21% · P11
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I. Basic Information for CVE-2023-20168

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in TACACS+ and RADIUS remote authentication for Cisco NX-OS Software could allow an unauthenticated, local attacker to cause an affected device to unexpectedly reload. This vulnerability is due to incorrect input validation when processing an authentication attempt if the directed request option is enabled for TACACS+ or RADIUS. An attacker could exploit this vulnerability by entering a crafted string at the login prompt of an affected device. A successful exploit could allow the attacker to cause the affected device to unexpectedly reload, resulting in a denial of service (DoS) condition.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未进行输入大小检查的缓冲区拷贝(传统缓冲区溢出)
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco NX-OS Software 输入验证错误漏洞
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存在安全漏洞，该漏洞源于TACACS+和RADIUS的身份验证过程存在安全漏洞。攻击者可利用该漏洞通过在登录提示符下输入特制的字符串来导致系统拒绝服务（DoS）。
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 4.2(1)SV1(4) -

II. Public POCs for CVE-2023-20168

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III. Intelligence Information for CVE-2023-20168

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Vendor Advisories for CVE-2023-20168 (1)

Same Patch Batch · Cisco · 2023-08-23 · 6 CVEs total

CVE-2023-20200 7.7 HIGH Cisco 多款产品安全漏洞
CVE-2023-20169 7.4 HIGH Cisco 多款产品输入验证错误漏洞
CVE-2023-20230 5.4 MEDIUM Cisco Application Policy Infrastructure Controller 安全漏洞
CVE-2023-20115 5.4 MEDIUM Cisco Nexus Series Switches 安全漏洞
CVE-2023-20234 4.4 MEDIUM Cisco FXOS Software 安全漏洞

IV. Related Vulnerabilities

Same product: Cisco NX-OS Software
Same vendor: Cisco
Same weakness: CWE-120

V. Comments for CVE-2023-20168

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