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Medium severity · published Dec 6, 2021
CVE-2021-43043
An issue was discovered in Kaseya Unitrends Backup Appliance before 10.5.5
6.5
CVSS
1.5%
EPSS
No
On KEV
Description
An issue was discovered in Kaseya Unitrends Backup Appliance before 10.5.5. The apache user could read arbitrary files such as /etc/shadow by abusing an insecure Sudo rule.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.5% · higher than 73% 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
Affected product
UB
Unitrends Backup
Kaseya
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-43043
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-43043
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
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