VDB-187548 · CVE-2021-43039 · GCVE-0-2021-43039

Kaseya Unitrends Backup Appliance up to 10.5.4 Samba access control

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.
6.8	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Kaseya Unitrends Backup Appliance up to 10.5.4 and classified as critical. This impacts an unknown function of the component Samba. The manipulation results in access control. This vulnerability was named CVE-2021-43039. The attack may be performed from remote. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Kaseya Unitrends Backup Appliance up to 10.5.4 (Backup Software). It has been classified as critical. Affected is an unknown code of the component Samba. The manipulation with an unknown input leads to a access control vulnerability. CWE is classifying the issue as CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. This is going to have an impact on confidentiality, integrity, and availability.

The weakness was presented 12/06/2021. The advisory is shared for download at helpdesk.kaseya.com. This vulnerability is traded as CVE-2021-43039 since 10/26/2021. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1068.

Upgrading to version 10.5.5 eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Backup Software

Vendor

Kaseya

Name

Unitrends Backup Appliance

Version

License

commercial

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.9
VulDB Meta Temp Score: 6.8

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD 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: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-284 / CWE-266
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: Unitrends Backup Appliance 10.5.5

Timelineinfo

10/26/2021 🔍
12/06/2021 +41 days 🔍
12/06/2021 +0 days 🔍
12/09/2021 +3 days 🔍

Sourcesinfo

Advisory: helpdesk.kaseya.com
Status: Confirmed

CVE: CVE-2021-43039 (🔍)
GCVE (CVE): GCVE-0-2021-43039
GCVE (VulDB): GCVE-100-187548

Entryinfo

Created: 12/06/2021 08:09
Updated: 12/09/2021 10:44
Changes: 12/06/2021 08:09 (40), 12/09/2021 10:38 (1), 12/09/2021 10:44 (18)
Complete: 🔍
Cache ID: 216::103