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CVE-2021-28809— Missing Authentication for Critical Function in RTRR Server in HBS3

Quick assessment

Affected
QNAP Systems Inc. HBS 3
Exploitation
High exploitation probability; assess promptly
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Qnap Systems QNAP HBS 3是中国威联通（Qnap Systems）公司的一个应用系统。一种全面的数据备份和灾难恢复解决方案。 HBS 3 Hybrid Backup Sync存在访问控制错误漏洞，该漏洞允许远程攻击者可利用该漏洞获得未经授权的访问，否则受到限制的功能。受影响的产品及版本如下:HBS 3混合备份同步:3.0.190923、3.0.191016、3.0.191108、3.0.191115、3.0.191202、3.0.191209、3.0.200113、3.0.200212

CVSS 9.8 · Critical EPSS 15.80% · P97

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation
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I. Basic Information for CVE-2021-28809

Vulnerability Information
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Vulnerability Title
Missing Authentication for Critical Function in RTRR Server in HBS3
Source: CVE Program / CVE List V5
Vulnerability Description
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
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
QNAP HBS 3 访问控制错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Qnap Systems QNAP HBS 3是中国威联通（Qnap Systems）公司的一个应用系统。一种全面的数据备份和灾难恢复解决方案。 HBS 3 Hybrid Backup Sync存在访问控制错误漏洞，该漏洞允许远程攻击者可利用该漏洞获得未经授权的访问，否则受到限制的功能。受影响的产品及版本如下:HBS 3混合备份同步:3.0.190923、3.0.191016、3.0.191108、3.0.191115、3.0.191202、3.0.191209、3.0.200113、3.0.200212
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
QNAP Systems Inc. HBS 3 unspecified ~ v3.0.210507 -
QNAP Systems Inc. HBS 3 unspecified ~ v3.0.210506 -
QNAP Systems Inc. HBS 3 unspecified ~ v3.0.210506 -

II. Public POCs for CVE-2021-28809

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III. Intelligence Information for CVE-2021-28809

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Vendor Advisories for CVE-2021-28809 (1)

Other References for CVE-2021-28809 (1)

IV. Related Vulnerabilities

Same product: HBS 3
Same vendor: QNAP Systems Inc.
Same weakness: CWE-284

V. Comments for CVE-2021-28809

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