CVE-2018-14558 : An issue was discovered on Tenda AC7 devices with firmware through V15.03.06.44

An issue was discovered on Tenda AC7 devices with firmware through V15.03.06.44_CN(AC7), AC9 devices with firmware through V15.03.05.19(6318)_CN(AC9), and AC10 devices with firmware through V15.03.06.23_CN(AC10). A command Injection vulnerability allows attackers to execute arbitrary OS commands via a crafted goform/setUsbUnload request. This occurs because the "formsetUsbUnload" function executes a dosystemCmd function with untrusted input.

Published 2018-10-30 18:29:01

Updated 2019-10-03 00:03:26

Source MITRE

View at NVD, CVE.org

Products affected by CVE-2018-14558

Tenda » Ac9 Firmware
Versions up to, including, (<=) 15.03.05.19\(6318\)_cn
cpe:2.3:o:tenda:ac9_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Tenda » AC9 » Version: N/A
Tenda » Ac7 Firmware
Versions up to, including, (<=) 15.03.06.44_cn
cpe:2.3:o:tenda:ac7_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Tenda » AC7 » Version: N/A
Tenda » Ac10 Firmware
Versions up to, including, (<=) 15.03.06.23_cn
cpe:2.3:o:tenda:ac10_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Tenda » Ac10 » Version: N/A

CVE-2018-14558 is in the CISA Known Exploited Vulnerabilities Catalog

CISA vulnerability name:

Tenda AC7, AC9, and AC10 Routers Command Injection Vulnerability

CISA required action:

Apply updates per vendor instructions.

CISA description:

Tenda AC7, AC9, and AC10 devices contain a command injection vulnerability due to the "formsetUsbUnload" function executes a dosystemCmd function with untrusted input. Successful exploitation allows an attacker to execute OS commands via a crafted goform/setUsbUnload request.

Notes:

https://nvd.nist.gov/vuln/detail/CVE-2018-14558

Added on 2021-11-03 Action due date 2022-05-03

Exploit prediction scoring system (EPSS) score for CVE-2018-14558

EPSS FAQ

93.62%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 99 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2018-14558

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
10.0	HIGH	AV:N/AC:L/Au:N/C:C/I:C/A:C	10.0	10.0	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: Complete Integrity Impact: Complete Availability Impact: Complete
9.8	CRITICAL	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	3.9	5.9	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: High

CWE ids for CVE-2018-14558

CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2018-14558

https://github.com/zsjevilhex/iot/blob/master/route/tenda/tenda-01/Tenda.md

iot/Tenda.md at master · zsjevilhex/iot · GitHub
Exploit;Third Party Advisory