CVE-2021-44052 Arbitrary file read
Remote attackers can traverse the file system to read or overwrite unintended files on QNAP NAS devices due to improper link resolution.
- 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-2021-44052?
CVE-2021-44052 is a medium-severity path traversal vulnerability in Qnap Qts, published on 5 May 2022. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
An improper link resolution before file access ('Link Following') vulnerability has been reported to affect QNAP device running QuTScloud, QuTS hero, and QTS. If exploited, this vulnerability allows remote attackers to traverse the file system to unintended locations and read or overwrite the contents of unexpected files. We have already fixed this vulnerability in the following versions of QuTScloud, QuTS hero, and QTS: QuTScloud c5.0.1.1998 and later QuTS hero h4.5.4.1971 build 20220310 and later QuTS hero h5.0.0.1986 build 20220324 and later QTS 4.3.4.1976 build 20220303 and later QTS 4.3.3.1945 build 20220303 and later QTS 4.2.6 build 20220304 and later QTS 4.3.6.1965 build 20220302 and later QTS 5.0.0.1986 build 20220324 and later QTS 4.5.4.1991 build 20220329 and later
Weakness: CWE-59
Which versions are affected by CVE-2021-44052?
It affects 3 products.
Products include Qnap Qts, Qnap Quts Hero, Qnap Qutscloud.
How do I fix CVE-2021-44052?
No fix has been published for CVE-2021-44052 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-2021-44052 being exploited?
There is no known exploitation of CVE-2021-44052 in the wild and no public exploit code.
Other vulnerabilities in Qnap Qts
Sources
Also known as GHSA-q4mx-gr8m-q3rr.