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CVE-2021-20027

Quick assessment

Affected
SonicWall SonicOS
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.

Sonicwall SonicWall SonicOS是美国SonicWall（Sonicwall）公司的一套专为SonicWall防火墙设备设计的操作系统。 SonicOS 存在安全漏洞，该漏洞允许远程攻击者通过发送一个特殊设计的请求来导致拒绝服务(DoS)。以下产品及版本受到影响： SonicOS Gen5, Gen6, Gen7 platforms, and SonicOSv virtual firewalls。

AI Predicted 7.5 Difficulty: Easy EPSS 1.29% · P69

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2021-20027

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A buffer overflow vulnerability in SonicOS allows a remote attacker to cause a Denial of Service (DoS) by sending a specially crafted request. This vulnerability affects SonicOS Gen5, Gen6, Gen7 platforms, and SonicOSv virtual firewalls.
Source: CVE Program / CVE List V5
CVSS Information
N/A
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
SonicWall SonicOS 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Sonicwall SonicWall SonicOS是美国SonicWall（Sonicwall）公司的一套专为SonicWall防火墙设备设计的操作系统。 SonicOS 存在安全漏洞，该漏洞允许远程攻击者通过发送一个特殊设计的请求来导致拒绝服务(DoS)。以下产品及版本受到影响： SonicOS Gen5, Gen6, Gen7 platforms, and SonicOSv virtual firewalls。
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
SonicWall SonicOS SonicOS 5.9.1.13 and earlier -

II. Public POCs for CVE-2021-20027

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III. Intelligence Information for CVE-2021-20027

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Other References for CVE-2021-20027 (1)

IV. Related Vulnerabilities

Same product: SonicOS
Same vendor: SonicWall
Same weakness: CWE-120

V. Comments for CVE-2021-20027

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