What is CVE-2017-17027?

CVE-2017-17027 is a critical-severity vulnerability in Qnap Qts, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.8/10. Published 2017-12-21.

How severe is CVE-2017-17027?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in Qnap Qts

CVE-2017-17027

A buffer overflow vulnerability in FTP service in QNAP QTS version 4.2.6 build 20171026, 4.3.3.0378 build 20171117, 4.3.4.0387 (Beta 2) build 20171116 and earlier could allow remote attackers to execute arbitrary code on NAS devices.

Vulnerability class: Buffer Overflow

EPSS: 0.032 (87.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Qnap Qts — versions 4.3.4.0358, 4.3.4.0370, 4.3.4.0372
Qnap Qts Ftp Service — versions 4.2.6 build 20171026, 4.3.3.0378 build 20171117, 4.3.4.0387 (Beta 2) build 20171116

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

References

security@qnapsecurity.com.tw (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_SECTRACK)
security@qnapsecurity.com.tw (x_refsource_CONFIRM, Issue Tracking, Vendor Advisory)

Frequently asked questions

What is CVE-2017-17027?: CVE-2017-17027 is a critical-severity vulnerability in Qnap Qts, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.8/10. Published 2017-12-21.
How severe is CVE-2017-17027?: Critical severity. CVSS v3 base score is 9.8 out of 10.