PT-2021-23728 · Kaseya · Kaseya Unitrends Backup Appliance

Rich Mirch · CVE-2021-43039 · Published 2021-12-06 · Updated 2022-11-28

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions Kaseya Unitrends Backup Appliance versions prior to 10.5.5

Description An issue was discovered in the Samba file sharing service, allowing anonymous read/write access.

Recommendations For versions prior to 10.5.5, update to version 10.5.5 or later to resolve the issue. As a temporary workaround, consider restricting access to the Samba file sharing service until the update is applied.

Exploit

Fix

Related Identifiers

CVE-2021-43039

Affected Products

Kaseya Unitrends Backup Appliance

References · 8

• 🔥 https://cyberonesecurity.com/blog/exploiting-kaseya-unitrends-backup-appliance-part-2 · Exploit
• 🔥 https://cyberonesecurity.com/blog/exploiting-kaseya-unitrends-backup-appliance-part-1 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2021-43039 · Security Note
• https://helpdesk.kaseya.com/hc/en-gb/articles/4412762258961 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-43039 · Vendor Advisory
• https://t.me/cvenotify/24271 · Telegram Post
• https://t.me/cvenotify/24251 · Telegram Post
• https://t.me/cibsecurity/33363 · Telegram Post