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CVE-2022-39339— Cleartext Transmission of Sensitive Information in user_oidc

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 user_oidc 1.2.1之前版本存在安全漏洞，该漏洞源于OIDC客户端凭证和令牌等敏感信息是在没有TLS的情况下以HTTP的纯文本形式发送，任何有权限监控用户流量的恶意行为者都有可能破坏账户安全。

CVSS 4.3 · Medium EPSS 0.46% · P37
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I. Basic Information for CVE-2022-39339

Vulnerability Information
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Vulnerability Title
Cleartext Transmission of Sensitive Information in user_oidc
Source: CVE Program / CVE List V5
Vulnerability Description
user_oidc is an OpenID Connect user backend for Nextcloud. In versions prior to 1.2.1 sensitive information such as the OIDC client credentials and tokens are sent in plain text of HTTP without TLS. Any malicious actor with access to monitor user traffic may have been able to compromise account security. This issue has been addressed in in user_oidc v1.2.1. Users are advised to upgrade. Users unable to upgrade may use https to access Nextcloud. Set an HTTPS discovery URL in the provider settings (in Nextcloud OIDC admin settings).
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
敏感数据的明文传输
Source: CVE Program / CVE List V5
Vulnerability Title
Nextcloud 安全漏洞
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 user_oidc 1.2.1之前版本存在安全漏洞，该漏洞源于OIDC客户端凭证和令牌等敏感信息是在没有TLS的情况下以HTTP的纯文本形式发送，任何有权限监控用户流量的恶意行为者都有可能破坏账户安全。
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 < 1.2.1 -

II. Public POCs for CVE-2022-39339

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III. Intelligence Information for CVE-2022-39339

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Patches & Fixes for CVE-2022-39339 (1)

Vendor Advisories for CVE-2022-39339 (1)

Other References for CVE-2022-39339 (1)

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-2022-39334 3.9 LOW nextcloudcmd incorrectly trusts bad TLS certificates
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-319

V. Comments for CVE-2022-39339

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