CVE-2021-28799

13.05.2021, 03:15

An improper authorization vulnerability has been reported to affect QNAP NAS running HBS 3 (Hybrid Backup Sync. ) If exploited, the vulnerability allows remote attackers to log in to a device. This issue affects: QNAP Systems Inc. HBS 3 versions prior to v16.0.0415 on QTS 4.5.2; versions prior to v3.0.210412 on QTS 4.3.6; versions prior to v3.0.210411 on QTS 4.3.4; versions prior to v3.0.210411 on QTS 4.3.3; versions prior to v16.0.0419 on QuTS hero h4.5.1; versions prior to v16.0.0419 on QuTScloud c4.5.1~c4.5.4. This issue does not affect: QNAP Systems Inc. HBS 2 . QNAP Systems Inc. HBS 1.3 .

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	NIST	10 CRITICAL	NETWORK	LOW	NONE	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
qnap	CNA	10 CRITICAL	NETWORK	LOW	NONE	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CVE	ADP	---				---
CISA-ADP	ADP	---				---

Base Score

CVSS 3.x

EPSS Score

Percentile: 99%

Vendor	Product	Version
qnap	hybrid_backup_sync	𝑥 < 16.0.0415
qnap	hybrid_backup_sync	𝑥 < 3.0.210412
qnap	hybrid_backup_sync	𝑥 < 3.0.210411
qnap	hybrid_backup_sync	𝑥 < 16.0.0419
qnap	hybrid_backup_sync	𝑥 < 16.0.0419

𝑥

= Vulnerable software versions

Common Weakness Enumeration

CWE-285 - Improper Authorization
The software does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action.

References

https://www.qnap.com/en/security-advisory/QSA-21-13