// For flags

CVE-2021-28799

QNAP NAS Improper Authorization Vulnerability

Severity Score

9.8
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

Yes
*KEV

Decision

-
*SSVC
Descriptions

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 .

Se ha reportado una vulnerabilidad de autorización inapropiada que afecta al QNAP NAS que ejecuta HBS versión 3 (Hybrid Backup Sync). Si es explotada, la vulnerabilidad permite a atacantes remotos iniciar sesión en un dispositivo. Este problema afecta a: QNAP Systems Inc. HBS 3 versiones anteriores a v16.0.0415 en QTS versión 4.5.2; versiones anteriores a v3.0.210412 en QTS versión 4.3.6; versiones anteriores a v3.0.210411 en QTS versión 4.3.4; versiones anteriores a v3.0.210411 en QTS versión 4.3.3; versiones anteriores a 16.0.0419 en QuTS hero versiones h4.5.1; anterior a versión v16.0.0419 en QuTScloud versiones c4.5.1~c4.5.4. Este problema no afecta a: QNAP Systems Inc. HBS versión 2. QNAP Systems Inc. HBS versión 1.3

QNAP NAS running HBS 3 contains an improper authorization vulnerability which can allow remote attackers to log in to a device.

*Credits: ZUSO ART
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2021-03-18 CVE Reserved
  • 2021-05-13 CVE Published
  • 2022-03-31 Exploited in Wild
  • 2022-04-21 KEV Due Date
  • 2024-04-10 EPSS Updated
  • 2024-09-17 CVE Updated
  • ---------- First Exploit
CWE
  • CWE-285: Improper Authorization
CAPEC
References (1)
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Qnap
Search vendor "Qnap"
Hybrid Backup Sync
Search vendor "Qnap" for product "Hybrid Backup Sync"
< 16.0.0415
Search vendor "Qnap" for product "Hybrid Backup Sync" and version " < 16.0.0415"
-
Affected
in Qnap
Search vendor "Qnap"
Qts
Search vendor "Qnap" for product "Qts"
4.5.2
Search vendor "Qnap" for product "Qts" and version "4.5.2"
-
Safe
Qnap
Search vendor "Qnap"
Hybrid Backup Sync
Search vendor "Qnap" for product "Hybrid Backup Sync"
< 3.0.210412
Search vendor "Qnap" for product "Hybrid Backup Sync" and version " < 3.0.210412"
-
Affected
in Qnap
Search vendor "Qnap"
Qts
Search vendor "Qnap" for product "Qts"
4.3.6
Search vendor "Qnap" for product "Qts" and version "4.3.6"
-
Safe
Qnap
Search vendor "Qnap"
Hybrid Backup Sync
Search vendor "Qnap" for product "Hybrid Backup Sync"
< 3.0.210411
Search vendor "Qnap" for product "Hybrid Backup Sync" and version " < 3.0.210411"
-
Affected
in Qnap
Search vendor "Qnap"
Qts
Search vendor "Qnap" for product "Qts"
4.3.3
Search vendor "Qnap" for product "Qts" and version "4.3.3"
-
Safe
Qnap
Search vendor "Qnap"
Hybrid Backup Sync
Search vendor "Qnap" for product "Hybrid Backup Sync"
< 3.0.210411
Search vendor "Qnap" for product "Hybrid Backup Sync" and version " < 3.0.210411"
-
Affected
in Qnap
Search vendor "Qnap"
Qts
Search vendor "Qnap" for product "Qts"
4.3.4
Search vendor "Qnap" for product "Qts" and version "4.3.4"
-
Safe
Qnap
Search vendor "Qnap"
Hybrid Backup Sync
Search vendor "Qnap" for product "Hybrid Backup Sync"
< 16.0.0419
Search vendor "Qnap" for product "Hybrid Backup Sync" and version " < 16.0.0419"
-
Affected
in Qnap
Search vendor "Qnap"
Quts Hero
Search vendor "Qnap" for product "Quts Hero"
h4.5.1
Search vendor "Qnap" for product "Quts Hero" and version "h4.5.1"
-
Safe
Qnap
Search vendor "Qnap"
Hybrid Backup Sync
Search vendor "Qnap" for product "Hybrid Backup Sync"
< 16.0.0419
Search vendor "Qnap" for product "Hybrid Backup Sync" and version " < 16.0.0419"
-
Affected
in Qnap
Search vendor "Qnap"
Qutscloud
Search vendor "Qnap" for product "Qutscloud"
>= c4.5.1 <= c4.5.4
Search vendor "Qnap" for product "Qutscloud" and version " >= c4.5.1 <= c4.5.4"
-
Safe