F-Secure Anti-Virus Engine on Linux Fmlib denial of service

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.
4.0$0-$5k0.00

Summaryinfo

A vulnerability was found in F-Secure Anti-Virus Engine on Linux. It has been classified as problematic. Affected is an unknown function of the component Fmlib. This manipulation causes denial of service. This vulnerability is tracked as CVE-2021-44747. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability has been found in F-Secure Anti-Virus Engine on Linux (Anti-Malware Software) (unknown version) and classified as problematic. Affected by this vulnerability is an unknown code block of the component Fmlib. The manipulation with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability.

The weakness was disclosed 03/01/2022. The advisory is shared at f-secure.com. This vulnerability is known as CVE-2021-44747 since 12/08/2021. It demands that the victim is doing some kind of user interaction. 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 03/01/2022). MITRE ATT&CK project uses the attack technique T1499 for this issue.

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

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

Productinfo

Type

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.0
VulDB Meta Temp Score: 4.0

VulDB Base Score: 3.5
VulDB Temp Score: 3.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 4.6
CNA Vector (F-Secure): 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

12/08/2021 🔍
03/01/2022 +83 days 🔍
03/01/2022 +0 days 🔍
03/04/2022 +3 days 🔍

Sourcesinfo

Vendor: f-secure.com

Advisory: f-secure.com
Status: Confirmed

CVE: CVE-2021-44747 (🔍)
GCVE (CVE): GCVE-0-2021-44747
GCVE (VulDB): GCVE-100-194017

Entryinfo

Created: 03/01/2022 14:46
Updated: 03/04/2022 09:20
Changes: 03/01/2022 14:46 (48), 03/04/2022 09:20 (1)
Complete: 🔍
Cache ID: 216::103

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

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