Critical severity · published Dec 31, 2020
CVE-2018-19945
A vulnerability has been reported to affect earlier QNAP devices running QTS 4.3.4 to 4.3.6
9.1
CVSS
1.1%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.1% · higher than 66% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
QT
Qts · Qnap
4.3.4 before 4.3.4.0899; 4.3.5 before 4.3.6.0895 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-19945
CVE.org
https://www.cve.org/CVERecord?id=CVE-2018-19945
Vendor Advisory
https://www.qnap.com/zh-tw/security-advisory/qsa-20-21
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