VDB-187877 · CVE-2021-42759 · FG-IR-21-004

Fortinet Meru AP up to 8.5.5/8.6.1 CLI Command os command injection

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.0	$0-$5k	0.00

Summaryinfo

A vulnerability marked as critical has been reported in Fortinet Meru AP up to 8.5.5/8.6.1. This affects an unknown function of the component CLI Command Handler. The manipulation leads to an unknown weakness. This vulnerability is uniquely identified as CVE-2021-42759. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Fortinet Meru AP up to 8.5.5/8.6.1. This issue affects an unknown code of the component CLI Command Handler. Using CWE to declare the problem leads to CWE-78. 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. Impacted is confidentiality, integrity, and availability.

The weakness was disclosed 12/09/2021 as FG-IR-21-004. The advisory is shared at fortiguard.com. The identification of this vulnerability is CVE-2021-42759 since 10/20/2021. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1202 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

Fortinet

Name

Meru AP

Version

License

commercial

Website

Vendor: https://www.fortinet.com/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.0
VulDB Meta Temp Score: 7.0

VulDB Base Score: 7.2
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 6.7
CNA Vector (Fortinet, Inc.): 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Os command injection
CWE: CWE-78 / CWE-77 / CWE-74
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

10/20/2021 🔍
12/09/2021 +50 days 🔍
12/09/2021 +0 days 🔍
12/15/2021 +6 days 🔍

Sourcesinfo

Vendor: fortinet.com

Advisory: FG-IR-21-004
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-42759 (🔍)
GCVE (CVE): GCVE-0-2021-42759
GCVE (VulDB): GCVE-100-187877

Entryinfo

Created: 12/09/2021 12:45
Updated: 12/15/2021 08:17
Changes: 12/09/2021 12:45 (46), 12/15/2021 08:13 (2), 12/15/2021 08:17 (9)
Complete: 🔍
Cache ID: 216::103