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CVE-2021-34947— NETGEAR R7800 net-cgi Out-Of-Bounds Write Remote Code Execution Vulnerability

Quick assessment

Affected
NETGEAR R7800
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 R7800是美国网件（Netgear）公司的一款无线路由器。 NETGEAR R7800 routers 存在缓冲区错误漏洞，该漏洞源于缺乏对用户提供的数据的正确验证造成的，这可能导致写入超过分配的数据结构的末尾。 攻击者可以利用此漏洞在 root 上下文中执行代码。

AI Predicted 9.8 Difficulty: Moderate EPSS 0.55% · P44
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I. Basic Information for CVE-2021-34947

Vulnerability Information
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Vulnerability Title
NETGEAR R7800 net-cgi Out-Of-Bounds Write Remote Code Execution Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
NETGEAR R7800 net-cgi Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R7800 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the parsing of the soap_block_table file. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated data structure. An attacker can leverage this vulnerability to execute code in the context of root. . Was ZDI-CAN-13055.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5
Vulnerability Title
Netgear NETGEAR R7800 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Netgear NETGEAR R7800是美国网件（Netgear）公司的一款无线路由器。 NETGEAR R7800 routers 存在缓冲区错误漏洞，该漏洞源于缺乏对用户提供的数据的正确验证造成的，这可能导致写入超过分配的数据结构的末尾。 攻击者可以利用此漏洞在 root 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 R7800 1.0.2.82 -

II. Public POCs for CVE-2021-34947

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III. Intelligence Information for CVE-2021-34947

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Vendor Advisories for CVE-2021-34947 (1)

Other References for CVE-2021-34947 (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-2021-34982 NETGEAR Multiple Routers httpd Stack-based Buffer Overflow Remote Code Execution Vulnerabi

IV. Related Vulnerabilities

Same product: R7800
Same vendor: NETGEAR
Same weakness: CWE-787

V. Comments for CVE-2021-34947

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