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CVE-2018-3953

Quick assessment

Affected
Linksys ESeries E1200
Exploitation
High exploitation probability; assess promptly
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Belkin Linksys E1200和E2500都是美国贝尔金（Belkin）公司的E系列的无线路由器产品。 使用2.0.09版本固件的Belkin Linksys E1200和使用3.0.04版本固件的Linksys E2500中存在操作系统命令注入漏洞。攻击者可通过发送特制的请求利用该漏洞在系统上执行任意命令。

AI Predicted 9.8 Difficulty: Trivial EPSS 13.51% · P96

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter
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I. Basic Information for CVE-2018-3953

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Devices in the Linksys ESeries line of routers (Linksys E1200 Firmware Version 2.0.09 and Linksys E2500 Firmware Version 3.0.04) are susceptible to OS command injection vulnerabilities due to improper filtering of data passed to and retrieved from NVRAM. Data entered into the 'Router Name' input field through the web portal is submitted to apply.cgi as the value to the 'machine_name' POST parameter. When the 'preinit' binary receives the SIGHUP signal, it enters a code path that continues until it reaches offset 0x0042B5C4 in the 'start_lltd' function. Within the 'start_lltd' function, a 'nvram_get' call is used to obtain the value of the user-controlled 'machine_name' NVRAM entry. This value is then entered directly into a command intended to write the host name to a file and subsequently executed.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linksys E1200和E2500 操作系统命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Belkin Linksys E1200和E2500都是美国贝尔金（Belkin）公司的E系列的无线路由器产品。 使用2.0.09版本固件的Belkin Linksys E1200和使用3.0.04版本固件的Linksys E2500中存在操作系统命令注入漏洞。攻击者可通过发送特制的请求利用该漏洞在系统上执行任意命令。
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
Linksys ESeries E1200 Firmware Version 2.0.09 -
Linksys ESeries E2500 Firmware Version 3.0.04 -

II. Public POCs for CVE-2018-3953

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III. Intelligence Information for CVE-2018-3953

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Other References for CVE-2018-3953 (1)

Same Patch Batch · Linksys · 2018-10-17 · 3 CVEs total

CVE-2018-3955 Linksys E1200和E2500 操作系统命令注入漏洞
CVE-2018-3954 Linksys E1200和E2500 操作系统命令注入漏洞

IV. Related Vulnerabilities

Same product: ESeries E1200
Same vendor: Linksys

V. Comments for CVE-2018-3953

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