CVE-2021-27708 — CRITICAL (9.8)

Vulnerability Description

Command Injection in TOTOLINK X5000R router with firmware v9.1.0u.6118_B20201102, and TOTOLINK A720R router with firmware v4.1.5cu.470_B20200911 allows remote attackers to execute arbitrary OS commands by sending a modified HTTP request. This occurs because the function executes glibc's system function with untrusted input. In the function, "command" parameter is directly passed to the attacker, allowing them to control the "command" field to attack the OS.

CVSS Score

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Totolink	X5000R Firmware	9.1.0u.6118_b20201102
Totolink	X5000R	-
Totolink	A720R Firmware	4.1.5cu.470_b20200911
Totolink	A720R	-

Related Weaknesses (CWE)

CWE-78

References

https://hackmd.io/7FtB06f-SJ-SCfkMYcXYxAExploitThird Party Advisory
https://hackmd.io/mDgIBvoxSPCZrZiZjfQGhwExploitThird Party Advisory
https://hackmd.io/7FtB06f-SJ-SCfkMYcXYxAExploitThird Party Advisory
https://hackmd.io/mDgIBvoxSPCZrZiZjfQGhwExploitThird Party Advisory

FAQ

What is CVE-2021-27708?

CVE-2021-27708 is a vulnerability with a CVSS score of 9.8 (CRITICAL). Command Injection in TOTOLINK X5000R router with firmware v9.1.0u.6118_B20201102, and TOTOLINK A720R router with firmware v4.1.5cu.470_B20200911 allows remote attackers to execute arbitrary OS command...

How severe is CVE-2021-27708?

CVE-2021-27708 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2021-27708?

Check the references section above for vendor advisories and patch information. Affected products include: Totolink X5000R Firmware, Totolink X5000R, Totolink A720R Firmware, Totolink A720R.