CVE-2021-28809

An improper access control vulnerability has been reported to affect certain legacy versions of HBS 3. If exploited, this vulnerability allows attackers to compromise the security of the operating system.QNAP have already fixed this vulnerability in the following versions of HBS 3: QTS 4.3.6: HBS 3 v3.0.210507 and later QTS 4.3.4: HBS 3 v3.0.210506 and later QTS 4.3.3: HBS 3 v3.0.210506 and later

CVSS v3 9.8 CRITICAL
CVSS v2.0 10.0 HIGH

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

10.0^/10

CVSS v2.0 : HIGH

Vector : AV:N/AC:L/Au:N/C:C/I:C/A:C

Exploitability : 10.0 / Impact : 10.0

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References

Link	Resource
https://www.qnap.com/en/security-advisory/qsa-21-19	Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-783/	Third Party Advisory VDB Entry

Configurations

Configuration 1 (hide)

AND

cpe:2.3:a:qnap:hybrid_backup_sync:*:*:*:*:*:*:*:*

cpe:2.3:o:qnap:qts:4.3.6:-:*:*:*:*:*:*

Configuration 2 (hide)

AND

cpe:2.3:a:qnap:hybrid_backup_sync:*:*:*:*:*:*:*:*

cpe:2.3:o:qnap:qts:4.3.4:-:*:*:*:*:*:*

Configuration 3 (hide)

AND

cpe:2.3:a:qnap:hybrid_backup_sync:*:*:*:*:*:*:*:*

cpe:2.3:o:qnap:qts:4.3.3:-:*:*:*:*:*:*

History

No history.

Information

Published : 2021-07-08 08:15

Updated : 2024-02-28 18:28

NVD link : CVE-2021-28809

Mitre link : CVE-2021-28809

CVE.ORG link : CVE-2021-28809

JSON object : View

Products Affected

qnap

hybrid_backup_sync
qts

CWE

CWE-284

Improper Access Control

CWE-306

Missing Authentication for Critical Function

CWE-749

Exposed Dangerous Method or Function

{"id": "CVE-2021-28809", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 10.0, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:N/C:C/I:C/A:C", "authentication": "NONE", "integrityImpact": "COMPLETE", "accessComplexity": "LOW", "availabilityImpact": "COMPLETE", "confidentialityImpact": "COMPLETE"}, "acInsufInfo": false, "impactScore": 10.0, "baseSeverity": "HIGH", "obtainAllPrivilege": false, "exploitabilityScore": 10.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 3.9}, {"type": "Secondary", "source": "security@qnapsecurity.com.tw", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 3.9}]}, "published": "2021-07-08T08:15:07.663", "references": [{"url": "https://www.qnap.com/en/security-advisory/qsa-21-19", "tags": ["Vendor Advisory"], "source": "security@qnapsecurity.com.tw"}, {"url": "https://www.zerodayinitiative.com/advisories/ZDI-21-783/", "tags": ["Third Party Advisory", "VDB Entry"], "source": "security@qnapsecurity.com.tw"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "security@qnapsecurity.com.tw", "description": [{"lang": "en", "value": "CWE-284"}, {"lang": "en", "value": "CWE-306"}, {"lang": "en", "value": "CWE-749"}]}], "descriptions": [{"lang": "en", "value": "An improper access control vulnerability has been reported to affect certain legacy versions of HBS 3. If exploited, this vulnerability allows attackers to compromise the security of the operating system.QNAP have already fixed this vulnerability in the following versions of HBS 3: QTS 4.3.6: HBS 3 v3.0.210507 and later QTS 4.3.4: HBS 3 v3.0.210506 and later QTS 4.3.3: HBS 3 v3.0.210506 and later"}, {"lang": "es", "value": "Se ha informado una vulnerabilidad de control de acceso inapropiado que afecta a determinadas versiones heredadas de HBS 3. Si es explotada, esta vulnerabilidad permite a atacantes comprometer la seguridad del sistema operativo.QNAP ya ha corregido esta vulnerabilidad en las siguientes versiones de HBS 3: QTS versiones 4.3.6: HBS 3 versiones v3.0.210507 y posteriores QTS versiones 4.3.4: HBS 3 versiones v3.0.210506 y posteriores"}], "lastModified": "2021-07-12T16:37:54.413", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:qnap:hybrid_backup_sync:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "73C3E8C3-5764-47DB-B856-81F9FA4102C9", "versionEndExcluding": "3.0.210507"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:qnap:qts:4.3.6:-:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "A0E214BD-DC96-4B53-9BE7-8DD8F79B4542"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:qnap:hybrid_backup_sync:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A69482D0-EC1B-48D9-9A5F-99376D199D59", "versionEndExcluding": "3.0.210506"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:qnap:qts:4.3.4:-:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "6A16F458-2E81-47E1-ADC8-5A93DF6FFC41"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:qnap:hybrid_backup_sync:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A69482D0-EC1B-48D9-9A5F-99376D199D59", "versionEndExcluding": "3.0.210506"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:qnap:qts:4.3.3:-:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "B16E7153-5F0F-489A-AA34-4A74CB04225B"}], "operator": "OR"}], "operator": "AND"}], "sourceIdentifier": "security@qnapsecurity.com.tw"}