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CVE-2021-20046

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。 SonicWall SonicOS存在安全漏洞，该漏洞源于系统处理HTTP Content-Length响应头时出现边界错误而存在的。远程未经身份验证的攻击者可利用该漏洞可以发送专门设计的HTTP响应，触发基于堆栈的缓冲区溢出，并在目标系统上执行任意代码。

AI Predicted 8.1 Difficulty: Moderate EPSS 1.94% · P79
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I. Basic Information for CVE-2021-20046

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A Stack-based buffer overflow in the SonicOS HTTP Content-Length response header allows a remote authenticated attacker to cause Denial of Service (DoS) and potentially results in code execution in the firewall. This vulnerability affected SonicOS Gen 5, Gen 6 and Gen 7 firmware versions.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
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。 SonicWall SonicOS存在安全漏洞，该漏洞源于系统处理HTTP Content-Length响应头时出现边界错误而存在的。远程未经身份验证的攻击者可利用该漏洞可以发送专门设计的HTTP响应，触发基于堆栈的缓冲区溢出，并在目标系统上执行任意代码。
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 7.0.1-R146 and earlier -

II. Public POCs for CVE-2021-20046

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III. Intelligence Information for CVE-2021-20046

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Other References for CVE-2021-20046 (1)

IV. Related Vulnerabilities

Same product: SonicOS
Same vendor: SonicWall
Same weakness: CWE-121

V. Comments for CVE-2021-20046

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