VDB-187876 · CVE-2021-36194 · FG-IR-21-152

Fortinet FortiWeb up to 6.3.15/6.4.1 API Controller stack-based overflow

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.
8.8	$0-$5k	0.00

Summaryinfo

A vulnerability labeled as critical has been found in Fortinet FortiWeb up to 6.3.15/6.4.1. The impacted element is an unknown function of the component API Controller. Executing a manipulation can lead to stack-based overflow. This vulnerability is handled as CVE-2021-36194. The attack can be executed remotely. There is not any exploit available. Once again VulDB remains the best source for vulnerability data.

Detailsinfo

A vulnerability classified as critical was found in Fortinet FortiWeb up to 6.3.15/6.4.1. This vulnerability affects an unknown part of the component API Controller. The manipulation with an unknown input leads to a stack-based overflow vulnerability. The CWE definition for the vulnerability is CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was released 12/09/2021 as FG-IR-21-152. The advisory is shared for download at fortiguard.com. This vulnerability was named CVE-2021-36194 since 07/06/2021. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 10/27/2024).

The vulnerability scanner Nessus provides a plugin with the ID 209729 (Fortinet FortiWeb (FG-IR-21-152)), which helps to determine the existence of the flaw in a target environment.

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

The vulnerability is also documented in the vulnerability database at Tenable (209729). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Firewall Software

Vendor

Fortinet

Name

FortiWeb

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: 8.8
VulDB Meta Temp Score: 8.8

VulDB Base Score: 8.8
VulDB Temp Score: 8.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 8.8
CNA Vector (Fortinet, Inc.): 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Stack-based overflow
CWE: CWE-121 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
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

Nessus ID: 209729
Nessus Name: Fortinet FortiWeb (FG-IR-21-152)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

07/06/2021 🔍
12/09/2021 +156 days 🔍
12/09/2021 +0 days 🔍
10/27/2024 +1053 days 🔍

Sourcesinfo

Vendor: fortinet.com

Advisory: FG-IR-21-152
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-36194 (🔍)
GCVE (CVE): GCVE-0-2021-36194
GCVE (VulDB): GCVE-100-187876

Entryinfo

Created: 12/09/2021 12:44 PM
Updated: 10/27/2024 02:04 AM
Changes: 12/09/2021 12:44 PM (48), 12/15/2021 08:03 AM (2), 12/15/2021 08:09 AM (7), 10/27/2024 02:04 AM (16)
Complete: 🔍
Cache ID: 244:7A4:40