High severity · published Dec 6, 2021
CVE-2021-43037
An issue was discovered in Kaseya Unitrends Backup Appliance before 10.5.5
7.8
CVSS
0.5%
EPSS
No
On KEV
Description
An issue was discovered in Kaseya Unitrends Backup Appliance before 10.5.5. The Unitrends Windows agent was vulnerable to DLL injection and binary planting due to insecure default permissions. This allowed privilege escalation from an unprivileged user to SYSTEM.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 44% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
UB
Unitrends Backup · Kaseya
10.0 before 10.5.5 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-43037
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-43037
Vendor Advisory
https://helpdesk.kaseya.com/hc/en-gb/articles/4412762258961
Exploit
https://www.cyberonesecurity.com/blog/exploiting-kaseya-unitrends-backup-appliance-part-1
Exploit
https://www.cyberonesecurity.com/blog/exploiting-kaseya-unitrends-backup-appliance-part-2
More from Unitrends Backup
9.8
CVE-2021-40386
Kaseya Unitrends Client/Agent through 10.5,5 allows remote attackers to execute arbitrary code
9.8
CVE-2021-43044
An issue was discovered in Kaseya Unitrends Backup Appliance before 10.5.5
9.8
CVE-2021-43042
An issue was discovered in Kaseya Unitrends Backup Appliance before 10.5.5
9.8
CVE-2021-43036
An issue was discovered in Kaseya Unitrends Backup Appliance before 10.5.5
9.8
CVE-2021-43035
An issue was discovered in Kaseya Unitrends Backup Appliance before 10.5.5