CVE-2021-20852
Quick assessment
Affected
ELECOM CO.,LTD. ELECOM LAN 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.
elecom lan是日本Elecom的一款路由器。 elecom lan 存在缓冲区错误漏洞，该漏洞源于由于边界错误。本地网络上的远程管理员可以触发基于堆栈的缓冲区溢出并在目标系统上执行任意代码。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2021-20852
Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Buffer overflow vulnerability in ELECOM LAN routers (WRH-733GBK firmware v1.02.9 and prior and WRH-733GWH firmware v1.02.9 and prior) allows a network-adjacent attacker with an administrator privilege to execute an arbitrary OS command via unspecified vectors.
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
elecom lan 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
elecom lan是日本Elecom的一款路由器。 elecom lan 存在缓冲区错误漏洞，该漏洞源于由于边界错误。本地网络上的远程管理员可以触发基于堆栈的缓冲区溢出并在目标系统上执行任意代码。
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 |
|---|---|---|---|---|
| ELECOM CO.,LTD. | ELECOM LAN routers | WRH-733GBK firmware v1.02.9 and prior and WRH-733GWH firmware v1.02.9 and prior | - |
|
II. Public POCs for CVE-2021-20852
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2021-20852 (1)
-
https://jvn.jp/en/jp/JVN88993473/index.html x_refsource_MISC
Other References for CVE-2021-20852 (1)
-
https://www.elecom.co.jp/news/security/20211130-01/ x_refsource_MISC
Same Patch Batch · ELECOM CO.,LTD. · 2021-12-01 · 13 CVEs total
| CVE-2021-20853 | elecom lan 操作系统命令注入漏洞 | |
| CVE-2021-20854 | elecom lan 操作系统命令注入漏洞 | |
| CVE-2021-20855 | elecom lan 跨站脚本漏洞 | |
| CVE-2021-20856 | elecom lan 跨站脚本漏洞 | |
| CVE-2021-20857 | elecom lan 跨站脚本漏洞 | |
| CVE-2021-20858 | elecom lan 跨站脚本漏洞 | |
| CVE-2021-20859 | elecom lan 操作系统命令注入漏洞 | |
| CVE-2021-20860 | elecom lan 跨站请求伪造漏洞 | |
| CVE-2021-20861 | elecom lan 授权问题漏洞 | |
| CVE-2021-20862 | Elecom Edwrc 访问控制错误漏洞 | |
| CVE-2021-20863 | Elecom Edwrc 操作系统操作系统命令注入漏洞 | |
| CVE-2021-20864 | Elecom Edwrc 安全漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2021-20852
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