#VU85056 Prototype pollution in QNAP QTS and QuTS hero - CVE-2023-39296

Vulnerability identifier: #VU85056

Vulnerability risk: Medium

CVSSv4.0: 4.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-39296

CWE-ID: CWE-1321

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
QNAP QTS
Server applications / File servers (FTP/HTTP)
QuTS hero
Hardware solutions / Firmware

Vendor: QNAP Systems, Inc.

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper input validation. A remote user can pass specially crafted input to the application and perform prototype pollution, leading to denial of service condition.

Mitigation
Install update from vendor's website.

Vulnerable software versions

QNAP QTS: before 5.1.3.2578, 5.1.3.2578

QuTS hero: before h5.1.3.2578 build 20231110

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External links
https://www.qnap.com/en/security-advisory/qsa-23-64

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.