Vulnerability · Published Jul 8, 2021 · Assigned by qnap

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

Critical 9.8

In plain English

A critical-severity improper access control in HBS 3 from QNAP Systems Inc.. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 16.1% (higher than 97% of all known vulnerabilities).

Severity (CVSS 3.1)9.8Critical

Exploit odds (30 days)16.1%top 3.1% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official 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

Affected products (as reported)

Vendor	Product	Versions
QNAP Systems Inc.	HBS 3	unspecified – before v3.0.210507
QNAP Systems Inc.	HBS 3	unspecified – before v3.0.210506
QNAP Systems Inc.	HBS 3	unspecified – before v3.0.210506

Weakness: CWE-284, CWE-306, CWE-749 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

https://www.qnap.com/en/security-advisory/qsa-21-19 x_refsource_MISC
https://www.zerodayinitiative.com/advisories/ZDI-21-783/ x_refsource_MISC