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CVE-2021-32658— Sensitive data may not be removed from storage on account removal

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 Android 存在信息泄露漏洞，该漏洞源于由于超时问题，Android客户端可能不会正确清理帐户删除所有敏感数据。攻击者可通过该漏洞获得密钥信息，如端到端加密密钥。以下产品及型号会受到影响： Nextcloud Android App 3.16.1之前版本。

CVSS 4.7 · Medium EPSS 0.30% · P21

Possible ATT&CK Techniques 1 AI

T1562.001
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I. Basic Information for CVE-2021-32658

Vulnerability Information
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Vulnerability Title
Sensitive data may not be removed from storage on account removal
Source: CVE Program / CVE List V5
Vulnerability Description
Nextcloud Android is the Android client for the Nextcloud open source home cloud system. Due to a timeout issue the Android client may not properly clean all sensitive data on account removal. This could include sensitive key material such as the End-to-End encryption keys. It is recommended that the Nextcloud Android App is upgraded to 3.16.1
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
Nextcloud Android 信息泄露漏洞
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 Android 存在信息泄露漏洞，该漏洞源于由于超时问题，Android客户端可能不会正确清理帐户删除所有敏感数据。攻击者可通过该漏洞获得密钥信息，如端到端加密密钥。以下产品及型号会受到影响： Nextcloud Android App 3.16.1之前版本。
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
nextcloud security-advisories < 3.16.1 -

II. Public POCs for CVE-2021-32658

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III. Intelligence Information for CVE-2021-32658

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Patches & Fixes for CVE-2021-32658 (1)

Vendor Advisories for CVE-2021-32658 (1)

Other References for CVE-2021-32658 (1)

IV. Related Vulnerabilities

Same product: security-advisories
Same vendor: nextcloud
Same weakness: CWE-200

V. Comments for CVE-2021-32658

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