CVE-2021-43033

An issue was discovered in Kaseya Unitrends Backup Appliance before 10.5.5. Multiple functions in the bpserverd daemon were vulnerable to arbitrary remote code execution as root. The vulnerability was caused by untrusted input (received by the server) being passed to system calls.

CVSS v3.1

9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v2.0

10.0 HIGHAV:N/AC:L/Au:N/C:C/I:C/A:C

EPSS

5.99% chance of exploitation in the next 30 days, 93th percentile

Published

2021-12-06

Updated

2024-08-04

Proof-of-concept exploits (2)

• https://www.cyberonesecurity.com/blog/exploiting-kaseya-unitrends-backup-appliance-part-1
• https://www.cyberonesecurity.com/blog/exploiting-kaseya-unitrends-backup-appliance-part-2

References

• CVE Record
• NVD entry

Related

• CVE-2021-43032
• CVE-2021-43034
• CVE-2021-43009
• CVE-2021-43035
• CVE-2021-43008
• CVE-2021-43036