Improper Authorization in QNAP HBS 3 Hybrid Backup Sync

1) Improper Authorization

EUVDB-ID: #VU52525

Risk: High

CVSSv3.1: 9.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2021-28799

CWE-ID: CWE-285 - Improper Authorization

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass authorization checks.

The vulnerability exists due to insufficient authorization checks. A remote attacker can bypass authorization checking and log in to a device.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

HBS 3 Hybrid Backup Sync: before 16.0.0419

External links

http://www.qnap.com/en/security-advisory/qsa-21-13

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.