Heap-based buffer overflow in QNAP QTS and QuTS hero



Risk High
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2023-38545
CWE-ID CWE-122
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
 QuTS hero
Hardware solutions / Firmware

QNAP QTS
Server applications / File servers (FTP/HTTP)

Vendor QNAP Systems, Inc.

Security Bulletin

This security bulletin contains one high risk vulnerability.

1) Heap-based buffer overflow

EUVDB-ID: #VU81865

Risk: High

CVSSv3.1: 7.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2023-38545

CWE-ID: CWE-122 - Heap-based Buffer Overflow

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in the SOCKS5 proxy handshake. A remote attacker can trick the victim to visit a malicious website, trigger a heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system but requires that SOCKS5 proxy is used and that SOCKS5 handshake is slow (e.g. under heavy load or DoS attack).

Mitigation

Install update from vendor's website.

Vulnerable software versions

QuTS hero: before h5.1.7.2770 build 20240520

QNAP QTS: before 5.1.7.2770 20240520

CPE2.3 External links

http://www.qnap.com/en/security-advisory/qsa-24-27


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.



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