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CVE-2018-19949

QNAP — QNAP NAS File Station Command Injection Vulnerability

QNAP · CWE-20 — Improper input validation | CWE-77 | CWE-78 — Operating system command injection · in CISA KEV since 2022-05-24

ExigentKEV since 2022 · listed over a yearRansomwareCISA KEVActively Exploited
85

EVRS 85 of 100 Immediate

Out-of-Band / Urgent Remediation

Rank 431 of 2,960 tracked

Raised to the floor for a confirmed exploited vulnerability.

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Why it scores 85

Evidence available: 6 of 7 signals

Listed in the CISA KEV catalog, and associated with known ransomware campaigns.

  • CISA KEVApplied
  • RansomwareApplied
  • Vendor exploitationDid not apply
  • EPSSApplied
  • Microsoft Exploitability IndexNot applicable
  • Pre-patch disclosureNo data
  • KEV recencyDid not apply
  • CVSSApplied

The band answers “how soon”, not “how bad”. No data for: Pre-patch disclosure. Why some signals show no data

Fix

Patch or fixed version identified

CISA required action

Fixed in

qts: update to 4.2.6 or later | qts: update to 4.3.3.1161 or later | qts: update to 4.3.4.1190 or later | qts: update to 4.3.6.1218 or later | qts: update to 4.4.1.1201 or later | qts: update to 4.4.2.1231 or later

Affected versions

  • qts< 4.2.6>= 4.3.1.0013 < 4.3.3.1161>= 4.3.4 < 4.3.4.1190>= 4.3.6 < 4.3.6.1218>= 4.4.0 < 4.4.1.1201>= 4.4.2 < 4.4.2.12314.2.6

Remediation

Apply updates per vendor instructions.

Fixed versions from NVD.

Evidence

Each value with its source
MeasureValueSource
CVSS base scoreHow severe the flaw is in itself. It does not say how likely an attack is. 9.8 NVD
FIRST EPSSFIRST's estimate of the chance this is exploited in the next 30 days, and how that ranks against all CVEs. 0.302 (98.2nd pctl) FIRST EPSS
Actively exploitedWhether a source of record has confirmed attacks using it in the wild. Confirmed CISA KEV
Ransomware campaign useWhether CISA has seen ransomware operators use it. Known CISA KEV
CISA remediation deadlineThe date US federal agencies must have fixed or mitigated it. 2022-06-14 · KEV since 2022 · listed over a year CISA KEV
Public exploit moduleA module existing is not the same as active exploitation. None known Metasploit
EUVD cross-referenceENISA's record: CVSS 9.8 (v3.1), assigned by qnap. Listed ENISA EUVD

Description

NVD

If exploited, this command injection vulnerability could allow remote attackers to run arbitrary commands. QNAP has already fixed the issue in the following QTS versions. QTS 4.4.2.1231 on build 20200302; QTS 4.4.1.1201 on build 20200130; QTS 4.3.6.1218 on build 20200214; QTS 4.3.4.1190 on build 20200107; QTS 4.3.3.1161 on build 20200109; QTS 4.2.6 on build 20200109.

What CISA says to do