Main Vulnerability Database Vulnerabilities #VU53422

Path traversal in QuTS hero and QNAP QTS - CVE-2021-28798

Published: May 21, 2021

Vulnerability identifier: #VU53422

CSH Severity: Medium

CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2021-28798

CWE-ID: CWE-22

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences. A remote attacker can send a specially crafted HTTP request and modify arbitrary files on the system.

Affected software

QuTS hero
QNAP QTS

How to mitigate CVE-2021-28798

Install update from vendor's website.

QuTS hero - update to h4.5.2.1638 build 20210414
QNAP QTS - addressed in versions 4.3.3.1624 20210416, 4.3.6.1663 20210504, 4.5.2.1630 20210406

External References

https://www.qnap.com/zh-tw/security-advisory/qsa-21-14

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