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CVE-2021-34982— NETGEAR Multiple Routers httpd Stack-based Buffer Overflow Remote Code Execution Vulnerability

Quick assessment

Affected
NETGEAR Multiple Routers
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.

Netgear NETGEAR是美国网件（Netgear）公司的一款路由器。连接两个或多个网络的硬件设备，在网络间起网关的作用。 NETGEAR路由器存在安全漏洞，该漏洞允许网络邻近攻击者可利用该漏洞在多个受影响的NETGEAR路由器的安装上执行任意代码。利用此漏洞不需要身份验证。具体的缺陷存在于httpd服务中，该服务默认侦听TCP端口80。当解析字符串文件时，在将用户提供的数据复制到固定长度的基于堆栈的缓冲区之前，进程没有正确地验证数据的长度。攻击者可利用该漏洞可以利用此漏洞在根目录上下文中执行代码。

AI Predicted 9.8 Difficulty: Easy EPSS 0.58% · P46
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I. Basic Information for CVE-2021-34982

Vulnerability Information
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Vulnerability Title
NETGEAR Multiple Routers httpd Stack-based Buffer Overflow Remote Code Execution Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
NETGEAR Multiple Routers httpd Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of multiple NETGEAR routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the httpd service, which listens on TCP port 80 by default. When parsing the strings file, the process does not properly validate the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. . Was ZDI-CAN-13709.
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
Netgear NETGEAR 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Netgear NETGEAR是美国网件（Netgear）公司的一款路由器。连接两个或多个网络的硬件设备，在网络间起网关的作用。 NETGEAR路由器存在安全漏洞，该漏洞允许网络邻近攻击者可利用该漏洞在多个受影响的NETGEAR路由器的安装上执行任意代码。利用此漏洞不需要身份验证。具体的缺陷存在于httpd服务中，该服务默认侦听TCP端口80。当解析字符串文件时，在将用户提供的数据复制到固定长度的基于堆栈的缓冲区之前，进程没有正确地验证数据的长度。攻击者可利用该漏洞可以利用此漏洞在根目录上下文中执行代码。
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
NETGEAR Multiple Routers V1.0.11.116_10.2.100 -

II. Public POCs for CVE-2021-34982

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III. Intelligence Information for CVE-2021-34982

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Vendor Advisories for CVE-2021-34982 (1)

Other References for CVE-2021-34982 (1)

Same Patch Batch · NETGEAR · 2024-05-07 · 4 CVEs total

CVE-2022-43654 NETGEAR CAX30S SSO Command Injection Remote Code Execution Vulnerability
CVE-2021-34983 NETGEAR Multiple Routers httpd Missing Authentication for Critical Function Information Di
CVE-2021-34947 NETGEAR R7800 net-cgi Out-Of-Bounds Write Remote Code Execution Vulnerability

IV. Related Vulnerabilities

Same product: Multiple Routers
Same vendor: NETGEAR
Same weakness: CWE-121

V. Comments for CVE-2021-34982

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