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CVE-2022-41882— Nextcloud Desktop vulnerable to code injection via malicious link

Quick assessment

Affected
nextcloud security-advisories
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.

Nextcloud是德国Nextcloud公司的一套开源的自托管文件同步和共享的通信应用平台。 Nextcloud Desktop Client存在安全漏洞，该漏洞源于其桌面客户端在单击nc://open/ 链接时可能会被诱骗打开/执行本地文件。

CVSS 6.6 · Medium EPSS 0.49% · P40
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I. Basic Information for CVE-2022-41882

Vulnerability Information
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Vulnerability Title
Nextcloud Desktop vulnerable to code injection via malicious link
Source: CVE Program / CVE List V5
Vulnerability Description
The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server with your computer. In version 3.6.0, if a user received a malicious file share and has it synced locally or the virtual filesystem enabled and clicked a nc://open/ link it will open the default editor for the file type of the shared file, which on Windows can also sometimes mean that a file depending on the type, e.g. "vbs", is being executed. It is recommended that the Nextcloud Desktop client is upgraded to version 3.6.1. As a workaround, users can block the Nextcloud Desktop client 3.6.0 by setting the `minimum.supported.desktop.version` system config to `3.6.1` on the server, so new files designed to use this attack vector are not downloaded anymore. Already existing files can still be used. Another workaround would be to enforce shares to be accepted by setting the `sharing.force_share_accept` system config to `true` on the server, so new files designed to use this attack vector are not downloaded anymore. Already existing shares can still be abused.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:L/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
对生成代码的控制不恰当(代码注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Nextcloud 代码注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Nextcloud是德国Nextcloud公司的一套开源的自托管文件同步和共享的通信应用平台。 Nextcloud Desktop Client存在安全漏洞，该漏洞源于其桌面客户端在单击nc://open/ 链接时可能会被诱骗打开/执行本地文件。
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
nextcloud security-advisories = 3.6.0 -

II. Public POCs for CVE-2022-41882

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III. Intelligence Information for CVE-2022-41882

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Patches & Fixes for CVE-2022-41882 (2)

Vendor Advisories for CVE-2022-41882 (1)

Other References for CVE-2022-41882 (1)

IV. Related Vulnerabilities

Same product: security-advisories
Same vendor: nextcloud
Same weakness: CWE-94

V. Comments for CVE-2022-41882

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