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CVE-2022-43970— Buffer overflow in Linksys WRT54GL

Quick assessment

Affected
Linksys WRT54GL Wireless-G Broadband Router
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.

Linksys WRT54GL是美国Linksys公司的一款无线路由器。 Linksys WRT54GL Wireless-G Broadband Router 4.30.18.006版本及之前版本存在安全漏洞。攻击者利用该漏洞以root身份在底层Linux操作系统上执行任意命令。

CVSS 7.2 · High EPSS 19.30% · P97
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I. Basic Information for CVE-2022-43970

Vulnerability Information
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Vulnerability Title
Buffer overflow in Linksys WRT54GL
Source: CVE Program / CVE List V5
Vulnerability Description
A buffer overflow vulnerability exists in Linksys WRT54GL Wireless-G Broadband Router with firmware <= 4.30.18.006. A stack-based buffer overflow in the Start_EPI function within the httpd binary allows an authenticated attacker with administrator privileges to execute arbitrary commands on the underlying Linux operating system as root. This vulnerablity can be triggered over the network via a malicious POST request to /apply.cgi.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
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
Linksys WRT54GL 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linksys WRT54GL是美国Linksys公司的一款无线路由器。 Linksys WRT54GL Wireless-G Broadband Router 4.30.18.006版本及之前版本存在安全漏洞。攻击者利用该漏洞以root身份在底层Linux操作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 WRT54GL Wireless-G Broadband Router Firmware ~ 4.30.18.006 -

II. Public POCs for CVE-2022-43970

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III. Intelligence Information for CVE-2022-43970

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Other References for CVE-2022-43970 (2)

Same Patch Batch · Linksys · 2023-01-09 · 4 CVEs total

CVE-2022-43971 7.2 HIGH Arbitrary code execution in Linksys WUMC710
CVE-2022-43973 7.2 HIGH Arbitrary code execution in Linksys WRT54GL
CVE-2022-43972 6.5 MEDIUM Null pointer dereference in Linksys WRT54GL

IV. Related Vulnerabilities

Same product: WRT54GL Wireless-G Broadband Router
Same vendor: Linksys
Same weakness: CWE-120

V. Comments for CVE-2022-43970

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