Command Injection Vulnerability in Tenda G1 and G3 Routers
CVE-2021-27692

9.8CRITICAL

Key Information:

Vendor

Tenda
Status
G1 Firmware
Vendor
CVE Published:
16 April 2021

What is CVE-2021-27692?

A command injection vulnerability exists in Tenda G1 and G3 routers, where attackers can execute arbitrary OS commands remotely. This security flaw arises from the improper handling of user inputs in the 'formSetUSBPartitionUmount' function, which directly invokes the 'doSystemCmd' function without adequate input validation. By sending crafted requests to the 'action/umountUSBPartition' endpoint, an attacker can manipulate the system and gain unauthorized access, potentially compromising the integrity of the device and its network environment.

References

https://hackmd.io/%40aZYpdinUS2SD-yhAeHwOkw/ry-t4QfMu
x_refsource_MISC

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

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CVE-2021-27692 : Command Injection Vulnerability in Tenda G1 and G3 Routers