9.8
CRITICAL
CVE-2021-27708
TOTOLINK Router Command Injection 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.

INFO

Published Date :

April 14, 2021, 4:15 p.m.

Last Modified :

Nov. 21, 2024, 5:58 a.m.

Remotely Exploitable :

Yes !

Impact Score :

5.9

Exploitability Score :

3.9
Affected Products

The following products are affected by CVE-2021-27708 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Totolink x5000r_firmware
2 Totolink a720r_firmware
3 Totolink x5000r
4 Totolink a720r
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2021-27708.

URL Resource
https://hackmd.io/7FtB06f-SJ-SCfkMYcXYxA Exploit Third Party Advisory
https://hackmd.io/mDgIBvoxSPCZrZiZjfQGhw Exploit Third Party Advisory
https://hackmd.io/7FtB06f-SJ-SCfkMYcXYxA Exploit Third Party Advisory
https://hackmd.io/mDgIBvoxSPCZrZiZjfQGhw Exploit Third Party Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2021-27708 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2021-27708 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference https://hackmd.io/7FtB06f-SJ-SCfkMYcXYxA
    Added Reference https://hackmd.io/mDgIBvoxSPCZrZiZjfQGhw
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Initial Analysis by [email protected]

    Apr. 21, 2021

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:C/I:C/A:C)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    Changed Reference Type https://hackmd.io/7FtB06f-SJ-SCfkMYcXYxA No Types Assigned https://hackmd.io/7FtB06f-SJ-SCfkMYcXYxA Exploit, Third Party Advisory
    Changed Reference Type https://hackmd.io/mDgIBvoxSPCZrZiZjfQGhw No Types Assigned https://hackmd.io/mDgIBvoxSPCZrZiZjfQGhw Exploit, Third Party Advisory
    Added CWE NIST CWE-78
    Added CPE Configuration AND OR *cpe:2.3:o:totolink:x5000r_firmware:9.1.0u.6118_b20201102:*:*:*:*:*:*:* OR cpe:2.3:h:totolink:x5000r:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:totolink:a720r_firmware:4.1.5cu.470_b20200911:*:*:*:*:*:*:* OR cpe:2.3:h:totolink:a720r:-:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Apr. 14, 2021

    Action Type Old Value New Value
    Changed Description Command Injection in TOTOLINK X5000R router with firmware v9.1.0u.6118_B20201102 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. 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.
    Added Reference https://hackmd.io/mDgIBvoxSPCZrZiZjfQGhw [No Types Assigned]
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2021-27708 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

6.86 }} 3.17%

score

0.93830

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability