CVE-2021-27708

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.

Related CPE's

ototolinkx5000r_firmware9.1.0u.6118_b20201102*******
vulnerable
htotolinkx5000r-*******
ototolinka720r_firmware4.1.5cu.470_b20200911*******
vulnerable
htotolinka720r-*******

References

https://hackmd.io/7FtB06f-SJ-SCfkMYcXYxA

ExploitThird Party Advisory

https://hackmd.io/mDgIBvoxSPCZrZiZjfQGhw

ExploitThird Party Advisory

CvssV3 impact

BaseSeverity

CRITICAL

ConfidentialityImpact

HIGH

AttackComplexity

LOW

Scope

UNCHANGED

AttackVector

NETWORK

AvailabilityImpact

HIGH

IntegrityImpact

HIGH

PrivilegesRequired

NONE

BaseScore

9.8

VectorString

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

Version

3.1

UserInteraction

NONE

CvssV2 impact

AccessComplexity

LOW

ConfidentialityImpact

COMPLETE

AvailabilityImpact

COMPLETE

IntegrityImpact

COMPLETE

BaseScore

10

VectorString

AV:N/AC:L/Au:N/C:C/I:C/A:C

Version

2.0

AccessVector

NETWORK

Authentication

NONE