#VU12891 Cross-site scripting in QNAP QTS - CVE-2017-13072

Vulnerability identifier: #VU12891

Vulnerability risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-13072

CWE-ID: CWE-79

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 perform cross-site scripting (XSS) attacks.

The weakness exists in App Center in QTS due to insufficient sanitization of user-supplied data. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Mitigation
Update to versions 4.2.6 build 20180504, 4.3.3 build 20180126, 4.3.4 build 20171230.

Vulnerable software versions

QNAP QTS: 4.2.6 20170517 - 4.2.6 20171208, 4.3.3 20170516 - 4.3.4 20171223

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External links
https://www.qnap.com/en/security-advisory/nas-201805-16

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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.