Vulnerability identifier: #VU9677

Vulnerability risk: High

CVSSv3.1: 8.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-17030

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
QNAP QTS
Server applications / File servers (FTP/HTTP)

Vendor: QNAP Systems, Inc.

Description

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

The vulnerability exists due to boundary error. A remote unauthenticated attacker can trigger memory corruption and execute arbitrary code on NAS devices.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Update to version 4.2.6 build 20171208, 4.3.3.0396 build 20171205, 4.3.4.0411 (Beta 3) build 20171208.

Vulnerable software versions

QNAP QTS: 4.3.3 20170516 - 4.3.4.0387 Beta 2 20171116, 4.2.6 20170517 - 4.2.6 20171026

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External links
http://www.qnap.com/en/security-advisory/nas-201712-15

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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.