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CVE-2022-39334— nextcloudcmd incorrectly trusts bad TLS certificates

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 3.6.1之前版本存在信任管理问题漏洞，该漏洞源于会错误地信任无效的TLS证书，用户在本地运行nextcloudcmd CLI命令的情况下，有可能出现中间人攻击。

CVSS 3.9 · Low EPSS 0.21% · P10

Possible ATT&CK Techniques 1 AI

T1557 · Adversary-in-the-Middle
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I. Basic Information for CVE-2022-39334

Vulnerability Information
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Vulnerability Title
nextcloudcmd incorrectly trusts bad TLS certificates
Source: CVE Program / CVE List V5
Vulnerability Description
Nextcloud also ships a CLI utility called nextcloudcmd which is sometimes used for automated scripting and headless servers. Versions of nextcloudcmd prior to 3.6.1 would incorrectly trust invalid TLS certificates, which may enable a Man-in-the-middle attack that exposes sensitive data or credentials to a network attacker. This affects the CLI only. It does not affect the standard GUI desktop Nextcloud clients, and it does not affect the Nextcloud server.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
证书验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Nextcloud 信任管理问题漏洞
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 3.6.1之前版本存在信任管理问题漏洞，该漏洞源于会错误地信任无效的TLS证书，用户在本地运行nextcloudcmd CLI命令的情况下，有可能出现中间人攻击。
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 < 3.6.1 -

II. Public POCs for CVE-2022-39334

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III. Intelligence Information for CVE-2022-39334

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Patches & Fixes for CVE-2022-39334 (1)

Vendor Advisories for CVE-2022-39334 (1)

Other References for CVE-2022-39334 (2)

Same Patch Batch · nextcloud · 2022-11-25 · 8 CVEs total

CVE-2022-39331 4.6 MEDIUM Cross-site Scripting (XSS) in Nexcloud Desktop Client
CVE-2022-39332 4.6 MEDIUM Cross-site scripting (XSS) in Nextcloud Desktop Client
CVE-2022-39333 4.6 MEDIUM Cross-site scripting (XSS) in Nextcloud Desktop Client
CVE-2022-39339 4.3 MEDIUM Cleartext Transmission of Sensitive Information in user_oidc
CVE-2022-39338 3.5 LOW Stored cross site scripting (XSS) vulnerability via Authorization Endpoint in user_oidc
CVE-2022-39346 3.5 LOW Missing length validation of user displayname in nextcloud server
CVE-2022-41926 3.3 LOW Nextcloud Talk Android broadcast incorrect permission handling

IV. Related Vulnerabilities

Same product: security-advisories
Same vendor: nextcloud
Same weakness: CWE-295

V. Comments for CVE-2022-39334

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