CVE-2021-28798 Relative Path Traversal Vulnerability in QTS and QuTS hero
Attackers can exploit a relative path traversal flaw in QNAP NAS firmware to modify system files, compromising system integrity.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-28798?
CVE-2021-28798 is a high-severity path traversal vulnerability in Qnap Qts, published on 21 May 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A relative path traversal vulnerability has been reported to affect QNAP NAS running QTS and QuTS hero. If exploited, this vulnerability allows attackers to modify files that impact system integrity. QNAP have already fixed this vulnerability in the following versions: QTS 4.5.2.1630 Build 20210406 and later QTS 4.3.6.1663 Build 20210504 and later QTS 4.3.3.1624 Build 20210416 and later QuTS hero h4.5.2.1638 Build 20210414 and later QNAP NAS running QTS 4.5.3 are not affected.
Which versions are affected by CVE-2021-28798?
It affects 2 products.
Products include Qnap Qts, Qnap Quts Hero.
How do I fix CVE-2021-28798?
No fix has been published for CVE-2021-28798 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2021-28798 being exploited?
There is no known exploitation of CVE-2021-28798 in the wild and no public exploit code.
Other vulnerabilities in Qnap Qts
Sources
Also known as GHSA-hc4v-wrjp-6qpg.