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
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
9.8 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
qnapCNA
9.8 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 67%
VendorProductVersion
qnaphybrid_backup_sync
𝑥
< 3.0.210507
qnaphybrid_backup_sync
𝑥
< 3.0.210506
qnaphybrid_backup_sync
𝑥
< 3.0.210506
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://www.qnap.com/en/security-advisory/qsa-21-19
https://www.zerodayinitiative.com/advisories/ZDI-21-783/
https://www.qnap.com/en/security-advisory/qsa-21-19
https://www.zerodayinitiative.com/advisories/ZDI-21-783/