PT-2021-17923 · Qnap · Qnap Nas+2

Zuso Art · Published 2021-05-21 · Updated 2022-10-18 · CVE-2021-28798

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions: QNAP NAS versions prior to QTS 4.5.2.1630 Build 20210406 QNAP NAS versions prior to QTS 4.3.6.1663 Build 20210504 QNAP NAS versions prior to QTS 4.3.3.1624 Build 20210416 QuTS hero versions prior to h4.5.2.1638 Build 20210414

Description: A relative path traversal issue has been reported to affect QNAP NAS running QTS and QuTS hero, allowing attackers to modify files that impact system integrity if exploited.

Recommendations: For QNAP NAS versions prior to QTS 4.5.2.1630 Build 20210406, update to QTS 4.5.2.1630 Build 20210406 or later. For QNAP NAS versions prior to QTS 4.3.6.1663 Build 20210504, update to QTS 4.3.6.1663 Build 20210504 or later. For QNAP NAS versions prior to QTS 4.3.3.1624 Build 20210416, update to QTS 4.3.3.1624 Build 20210416 or later. For QuTS hero versions prior to h4.5.2.1638 Build 20210414, update to QuTS hero h4.5.2.1638 Build 20210414 or later.

Fix

Improper Access Control

Relative Path Traversal

Path traversal

Weakness Enumeration

CWE-284

CWE-23

CWE-22

Related Identifiers

CVE-2021-28798

Affected Products

Qnap Nas

Qts

Quts Hero

References · 4

• https://osv.dev/vulnerability/CVE-2021-28798 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-28798 · Security Note
• https://qnap.com/zh-tw/security-advisory/qsa-21-14 · Vendor Advisory
• https://t.me/cvenotify/14776 · Telegram Post