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CVE-2018-19945— Improper Limitation of a Pathname to a Restricted Directory in QTS

Quick assessment

Affected
QNAP Systems Inc. QTS
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Qnap Systems QNAP Systems TS-870是中国威联通（Qnap Systems）公司的一款NAS（网络附属存储）设备。 使用4.3.4.0486版本固件的QNAP Systems TS-870中存在安全漏洞。攻击者可利用该漏洞向任意路径上传文件。

AI Predicted 6.5 Difficulty: Moderate EPSS 1.12% · P65

Possible ATT&CK Techniques 1 AI

T1565.001 · Stored Data Manipulation
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I. Basic Information for CVE-2018-19945

Vulnerability Information
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Vulnerability Title
Improper Limitation of a Pathname to a Restricted Directory in QTS
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Qnap Systems QNAP Systems TS-870 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Qnap Systems QNAP Systems TS-870是中国威联通（Qnap Systems）公司的一款NAS（网络附属存储）设备。 使用4.3.4.0486版本固件的QNAP Systems TS-870中存在安全漏洞。攻击者可利用该漏洞向任意路径上传文件。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
QNAP Systems Inc. QTS unspecified ~ 4.3.6.0895 -
QNAP Systems Inc. QTS unspecified ~ 4.3.4.0899 -
QNAP Systems Inc. QTS 4.5.x -

II. Public POCs for CVE-2018-19945

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III. Intelligence Information for CVE-2018-19945

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Other References for CVE-2018-19945 (1)

Same Patch Batch · QNAP Systems Inc. · 2020-12-31 · 3 CVEs total

CVE-2018-19941 Cleartext Storage of Sensitive Information in Cookies
CVE-2018-19944 Cleartext Transmission of Sensitive Information in SNMP

IV. Related Vulnerabilities

Same product: QTS
Same vendor: QNAP Systems Inc.
Same weakness: CWE-20

V. Comments for CVE-2018-19945

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