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CVE-2021-43863— SQL Injection in FileContentProvider (GHSL-2021-1007)

Quick assessment

Affected
nextcloud android
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 Android app是德国Nextcloud公司的一款基于Android平台，用于访问Nextcloud服务器的移动应用程序。 Nextcloud Android app存在SQL注入漏洞，该漏洞源于基于数据库的应用缺少对外部输入SQL语句的验证。攻击者可利用该漏洞执行非法SQL命令。

CVSS 7.5 · High EPSS 1.87% · P79
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I. Basic Information for CVE-2021-43863

Vulnerability Information
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Vulnerability Title
SQL Injection in FileContentProvider (GHSL-2021-1007)
Source: CVE Program / CVE List V5
Vulnerability Description
The Nextcloud Android app is the Android client for Nextcloud, a self-hosted productivity platform. The Nextcloud Android app uses content providers to manage its data. Prior to version 3.18.1, the providers `FileContentProvider` and `DiskLruImageCacheFileProvider` have security issues (an SQL injection, and an insufficient permission control, respectively) that allow malicious apps in the same device to access Nextcloud's data bypassing the permission control system. Users should upgrade to version 3.18.1 to receive a patch. There are no known workarounds aside from upgrading.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
SQL命令中使用的特殊元素转义处理不恰当(SQL注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Nextcloud Android app SQL注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Nextcloud Android app是德国Nextcloud公司的一款基于Android平台，用于访问Nextcloud服务器的移动应用程序。 Nextcloud Android app存在SQL注入漏洞，该漏洞源于基于数据库的应用缺少对外部输入SQL语句的验证。攻击者可利用该漏洞执行非法SQL命令。
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 android < 3.18.1 -

II. Public POCs for CVE-2021-43863

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III. Intelligence Information for CVE-2021-43863

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Patches & Fixes for CVE-2021-43863 (1)

Vendor Advisories for CVE-2021-43863 (1)

Other References for CVE-2021-43863 (1)

IV. Related Vulnerabilities

Same product: android
Same vendor: nextcloud
Same weakness: CWE-89

V. Comments for CVE-2021-43863

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