CVE-2021-40556
Quick assessment
Affected
n/a n/a
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.
ASUS RT-AX56U是中国华硕（ASUS）公司的一款无线路由器。 ASUS RT-AX56U Router固件 3.0.0.4.386.44266版本存在缓冲区错误漏洞，该漏洞源于其 caupload 输入句柄函数调用strcat函数时允许用户向堆栈中输入0xFFFF字节导致攻击者可以远程执行命令。
Possible ATT&CK Techniques 2 AI
T1059 · Command and Scripting Interpreter T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2021-40556
Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A stack overflow vulnerability exists in the httpd service in ASUS RT-AX56U Router Version 3.0.0.4.386.44266. This vulnerability is caused by the strcat function called by "caupload" input handle function allowing the user to enter 0xFFFF bytes into the stack. This vulnerability allows an attacker to execute commands remotely. The vulnerability requires authentication.
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
ASUS RT-AX56U 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ASUS RT-AX56U是中国华硕（ASUS）公司的一款无线路由器。 ASUS RT-AX56U Router固件 3.0.0.4.386.44266版本存在缓冲区错误漏洞，该漏洞源于其 caupload 输入句柄函数调用strcat函数时允许用户向堆栈中输入0xFFFF字节导致攻击者可以远程执行命令。
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 |
|---|---|---|---|---|
| - | n/a | n/a | - |
|
II. Public POCs for CVE-2021-40556
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2021-40556 (2)
Same Patch Batch · n/a · 2022-10-06 · 31 CVEs total
| CVE-2022-42457 | 9.1 CRITICAL | Generex UPS Adapter CS141 安全漏洞 |
| CVE-2022-41521 | TOTOLINK NR1800X 缓冲区错误漏洞 | |
| CVE-2022-42250 | Simple Cold Storage Management System SQL注入漏洞 | |
| CVE-2022-42249 | Simple Cold Storage Management System SQL注入漏洞 | |
| CVE-2022-42243 | Simple Cold Storage Management System SQL注入漏洞 | |
| CVE-2022-42242 | Simple Cold Storage Management System SQL注入漏洞 | |
| CVE-2022-42241 | Simple Cold Storage Management System SQL注入漏洞 | |
| CVE-2022-41556 | lighttpd 安全漏洞 | |
| CVE-2022-41528 | TOTOLINK NR1800X 缓冲区错误漏洞 | |
| CVE-2022-41527 | TOTOLINK NR1800X 缓冲区错误漏洞 | |
| CVE-2022-41526 | TOTOLINK NR1800X 缓冲区错误漏洞 | |
| CVE-2022-41525 | TOTOLINK NR1800X 操作系统命令注入漏洞 | |
| CVE-2022-41524 | TOTOLINK NR1800X 缓冲区错误漏洞 | |
| CVE-2022-41523 | TOTOLINK NR1800X 缓冲区错误漏洞 | |
| CVE-2022-41522 | TOTOLINK NR1800X 缓冲区错误漏洞 | |
| CVE-2022-26235 | Beckman Coulter Remisol Advance 安全漏洞 | |
| CVE-2022-41520 | TOTOLINK NR1800X 缓冲区错误漏洞 | |
| CVE-2022-41518 | TOTOLINK NR1800X 操作系统命令注入漏洞 | |
| CVE-2022-41517 | TOTOLINK NR1800X 缓冲区错误漏洞 | |
| CVE-2022-41355 | Online Leave Management System SQL注入漏洞 |
Showing top 20 of 31 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
V. Comments for CVE-2021-40556
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