CVE-2021-43863 — CVE & Security Advisory Radar

🎯 CVE-2021-43863 🧪 PoC 🇪🇺 EUVD

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CVE-2021-43863 | 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 contro

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.

Klassifikation & Betroffenheit:

nextcloud Android < 3.18.1Android < 3.18.1

Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') 🎯 High

The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. Without sufficient removal or quoting of SQL syntax in user-controllable inputs, the generated SQL query can cause those inputs to be interpreted as…

🛡️ Empfohlene Mitigation: Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid [REF-1482]. For example, consider using persistence layers such as Hibernate or Enterprise Java Beans, which can provide significant protection against SQL injection if used proper…

Vollständige Definition bei MITRE ➔

⚔️ Typische Angriffsmuster (CAPEC):

CAPEC-7 · Blind SQL Injection (High) CAPEC-66 · SQL Injection (High) CAPEC-108 · Command Line Execution through SQL Injec… (Very High) CAPEC-109 · Object Relational Mapping Injection (High) CAPEC-110 · SQL Injection through SOAP Parameter Tam… (Very High) CAPEC-470 · Expanding Control over the Operating Sys… (Very High)

🧩 Ähnliche Schwachstellen (Hersteller/Klasse/Score-Band):

CVE-2021-41178 8.8 CVE-2023-35172 8.7 CVE-2023-32320 8.7 CVE-2023-48239 8.5 CVE-2023-35928 8.5

🩹 Patch verfügbar (OSV):

🩹 a23cd53462c359812167ea8c0c8d4973e4d0e40d (Commit) 🩹 627caba60e69e223b0fc89c4cb18eaa76a95db95 (Commit)

📚 Referenzen & Quellen:

🇪🇺 Original-Eintrag (ENISA EUVD) 🇺🇸 NVD-Eintrag

Ausnutzungs-Zeitleiste:

Reserviert 2021

Veröffentlicht 01/2022

Heute 21.09.

CVSS-Vektor-Analyse: 7.5

AV · Angriffsvektor Netzwerk

AC · Komplexität Gering

PR · Privilegien Keine

UI · Interaktion Keine

S · Scope Unverändert

C · Vertraulichkeit Hoch

I · Integrität Keine

A · Verfügbarkeit Keine

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Veröffentlicht:25.01.2022

Aktualisiert:23.04.2025 19:09

Assigner (CNA):GitHub_M

EUVD-ID:EUVD-2021-30725

CWE-89: SQL Injection ✓ Offizieller Patch / Advisory verfügbar

💡 Gegenmaßnahme: Sicherheits-Update des Herstellers zeitnah einspielen und Netzwerksegmentierung prüfen.

Tier	2026-09-04	2026-09-21
≥90 %	0	488
≥50 %	0	1471
≥10 %	0	7
<10 %	300	0

EPSS

1.9%

CVE-2021-43863 🌐 Netzwerk (Remote) 🔓 Keine Authentifizierung nötig

nextcloud

CVE-2021-43863 | 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 contro

CWE-89: SQL Injection ✓ Offizieller Patch / Advisory verfügbar

💡 Gegenmaßnahme: Sicherheits-Update des Herstellers zeitnah einspielen und Netzwerksegmentierung prüfen.

25.01.2022

🛡️ Details ➔

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