CVE-2018-19945
Improper Limitation of a Pathname to a Restricted Directory in QTS
- Published
- Updated
- Reserved
- Assigned by
- qnap
Description
A vulnerability has been reported to affect earlier QNAP devices running QTS 4.3.4 to 4.3.6. Caused by improper limitations of a pathname to a restricted directory, this vulnerability allows for renaming arbitrary files on the target system, if exploited. QNAP have already fixed this vulnerability in the following versions: QTS 4.3.6.0895 build 20190328 (and later) QTS 4.3.4.0899 build 20190322 (and later) This issue does not affect QTS 4.4.x or QTS 4.5.x.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Critical9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H |
- EPSS (exploitation in 30 days)
- 1.1% · top 34% of all CVEs (4 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.1.
Weakness
- CWE-20 Improper Input Validation (opens in a new tab)All about CWE-20 and its CVEs
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') (opens in a new tab)All about CWE-22 and its CVEs
- CWE-73 External Control of File Name or Path (opens in a new tab)All about CWE-73 and its CVEs
- CWE-284 Improper Access Control (opens in a new tab)All about CWE-284 and its CVEs
Affected products
- affected unspecified – < 4.3.6.0895
- affected unspecified – < 4.3.4.0899
- unaffected 4.5.x
- unaffected 4.4.x
What to do
Solution: QNAP have already fixed this vulnerability in the following versions: QTS 4.3.6.0895 build 20190328 (and later) QTS 4.3.4.0899 build 20190322 (and later) This issue does not affect QTS 4.4.x or QTS 4.5.x.
References (1)
- https://www.qnap.com/zh-tw/security-advisory/qsa-20-21 (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2018-19945)Record last updated .