Command Injection Vulnerability in Tenda G0, G1 and G3 Routers
CVE-2021-27691

9.8CRITICAL

Key Information:

Vendor

Tenda
Status
G0 Firmware
Vendor
CVE Published:
16 April 2021

What is CVE-2021-27691?

A command injection vulnerability exists in Tenda G0 routers and Tenda G1 and G3 routers due to inadequate validation of user input. When a malformed action/setDebugCfg request is sent, it allows remote attackers to execute arbitrary operating system commands by leveraging the vulnerable 'formSetDebugCfg' function, which mishandles unsanitized input through glibc's system function. This flaw poses significant risks to the network's security and integrity, enabling unauthorized users to take control of the router's functions.

References

https://hackmd.io/%40aZYpdinUS2SD-yhAeHwOkw/rkhTCGzMd
x_refsource_MISC

EPSS Score

25% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.