VDB-221745 · CVE-2021-4105 · GCVE-0-2021-4105

BG-TEK COSLAT Firewall prior 5.24.0.R.202107 parameters

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.
9.7	$0-$5k	0.00

Summaryinfo

A vulnerability classified as very critical has been found in BG-TEK COSLAT Firewall. The impacted element is an unknown function. Performing a manipulation results in improper handling of parameters. This vulnerability is known as CVE-2021-4105. Remote exploitation of the attack is possible. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as very critical, was found in BG-TEK COSLAT Firewall (Firewall Software). This affects some unknown processing. The manipulation with an unknown input leads to a improper handling of parameters vulnerability. CWE is classifying the issue as CWE-233. The product does not properly handle when the expected number of parameters, fields, or arguments is not provided in input, or if those parameters are undefined. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Improper Handling of Parameters vulnerability in BG-TEK COSLAT Firewall allows Remote Code Inclusion. This issue affects COSLAT Firewall: from 5.24.0.R.20180630 before 5.24.0.R.20210727.

The weakness was published 02/24/2023. The advisory is shared at blog.coslat.com. This vulnerability is uniquely identified as CVE-2021-4105 since 12/13/2021. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 05/18/2026).

Upgrading to version 5.24.0.R.202107 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Firewall Software

Vendor

BG-TEK

Name

COSLAT Firewall

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.8
VulDB Meta Temp Score: 9.7

VulDB Base Score: 9.8
VulDB Temp Score: 9.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CNA Base Score: 9.8
CNA Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

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: 🔍

Exploitinginfo

Class: Improper handling of parameters
CWE: CWE-233 / CWE-229 / CWE-20
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

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: COSLAT Firewall 5.24.0.R.202107

Timelineinfo

12/13/2021 🔍
02/24/2023 +438 days 🔍
02/24/2023 +0 days 🔍
05/18/2026 +1179 days 🔍

Sourcesinfo

Advisory: blog.coslat.com
Status: Confirmed

CVE: CVE-2021-4105 (🔍)
GCVE (CVE): GCVE-0-2021-4105
GCVE (VulDB): GCVE-100-221745

Entryinfo

Created: 02/24/2023 15:45
Updated: 05/18/2026 17:05
Changes: 02/24/2023 15:45 (47), 05/18/2026 17:05 (27)
Complete: 🔍
Cache ID: 216::103