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CVE-2022-43972— Null pointer dereference in Linksys WRT54GL

Quick assessment

Affected
Linksys WRT54GL Wireless-G Broadband Router
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.

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，该漏洞源于存在空指针取消引用漏洞。攻击者利用该漏洞通过调用AddPortMapping操作的恶意POST请求触发。

CVSS 6.5 · Medium EPSS 1.31% · P69

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2022-43972

Vulnerability Information
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Vulnerability Title
Null pointer dereference in Linksys WRT54GL
Source: CVE Program / CVE List V5
Vulnerability Description
A null pointer dereference vulnerability exists in Linksys WRT54GL Wireless-G Broadband Router with firmware <= 4.30.18.006. A null pointer dereference in the soap_action function within the upnp binary can be triggered by an unauthenticated attacker via a malicious POST request invoking the AddPortMapping action.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
空指针解引用
Source: CVE Program / CVE List V5
Vulnerability Title
Linksys WRT54GL 代码问题漏洞
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，该漏洞源于存在空指针取消引用漏洞。攻击者利用该漏洞通过调用AddPortMapping操作的恶意POST请求触发。
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-2022-43972

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III. Intelligence Information for CVE-2022-43972

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Other References for CVE-2022-43972 (2)

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

CVE-2022-43970 7.2 HIGH Buffer overflow in Linksys WRT54GL
CVE-2022-43971 7.2 HIGH Arbitrary code execution in Linksys WUMC710
CVE-2022-43973 7.2 HIGH Arbitrary code execution in Linksys WRT54GL

IV. Related Vulnerabilities

Same product: WRT54GL Wireless-G Broadband Router
Same vendor: Linksys
Same weakness: CWE-476

V. Comments for CVE-2022-43972

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