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CVE-2021-34360— CSRF Bypass in Proxy Server

Quick assessment

Affected
QNAP Systems Inc. Proxy Server
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 NAS是中国威联通科技（QNAP）公司的一个可访问且快速的存储解决方案。 QNAP NAS 的代理服务器中存在跨站请求伪造漏洞，远程攻击者可以利用该漏洞注入恶意代码，以下产品和版本受到影响：QTS 4.5.x，5.0.x 对应的代理服务器 1.4.2 及之前版本、QuTS hero h5.0.x系列对应的代理服务器 1.4.3及之前版本、QuTScloud c4.5.x, c5.0.x系列对应的代理服务器1.4.2及之前的版本。

CVSS 5.3 · Medium EPSS 0.48% · P41

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2021-34360

Vulnerability Information
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Vulnerability Title
CSRF Bypass in Proxy Server
Source: CVE Program / CVE List V5
Vulnerability Description
A cross-site request forgery (CSRF) vulnerability has been reported to affect QNAP device running Proxy Server. If exploited, this vulnerability allows remote attackers to inject malicious code. We have already fixed this vulnerability in the following versions of Proxy Server: QTS 4.5.x: Proxy Server 1.4.2 ( 2021/12/30 ) and later QuTS hero h5.0.0: Proxy Server 1.4.3 ( 2022/01/18 ) and later QuTScloud c4.5.6: Proxy Server 1.4.2 ( 2021/12/30 ) and later
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
跨站请求伪造(CSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
QNAP NAS 代理服务器跨站请求伪造漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
QNAP NAS是中国威联通科技（QNAP）公司的一个可访问且快速的存储解决方案。 QNAP NAS 的代理服务器中存在跨站请求伪造漏洞，远程攻击者可以利用该漏洞注入恶意代码，以下产品和版本受到影响：QTS 4.5.x，5.0.x 对应的代理服务器 1.4.2 及之前版本、QuTS hero h5.0.x系列对应的代理服务器 1.4.3及之前版本、QuTScloud c4.5.x, c5.0.x系列对应的代理服务器1.4.2及之前的版本。
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. Proxy Server unspecified ~ 1.4.2 ( 2021/12/30 ) -
QNAP Systems Inc. Proxy Server unspecified ~ 1.4.3 ( 2022/01/18 ) -
QNAP Systems Inc. Proxy Server unspecified ~ 1.4.2 ( 2021/12/30 ) -

II. Public POCs for CVE-2021-34360

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III. Intelligence Information for CVE-2021-34360

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Other References for CVE-2021-34360 (1)

IV. Related Vulnerabilities

Same product: Proxy Server
Same vendor: QNAP Systems Inc.
Same weakness: CWE-352