CVE-2023-28646— App lockout in nextcloud Android app can be bypassed via thirdparty apps
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I. Basic Information for CVE-2023-28646
Vulnerability Information
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Vulnerability Title
App lockout in nextcloud Android app can be bypassed via thirdparty apps
Source: NVD (National Vulnerability Database)
Vulnerability Description
Nextcloud android is an android app for interfacing with the nextcloud home server ecosystem. In versions from 3.7.0 and before 3.24.1 an attacker that has access to the unlocked physical device can bypass the Nextcloud Android Pin/passcode protection via a thirdparty app. This allows to see meta information like sharer, sharees and activity of files. It is recommended that the Nextcloud Android app is upgraded to 3.24.1. There are no known workarounds for this vulnerability.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:P/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
认证机制不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
Nextcloud Android app 安全漏洞
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 3.7.0版本至3.24.1之前版本存在安全漏洞，该漏洞源于可以通过第三方应用程序绕过 Nextcloud Android Pin/passcode保护。
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 | >= 3.7.0, < 3.24.1 | - |
II. Public POCs for CVE-2023-28646
| # | POC Description | Source Link | Shenlong Link |
|---|
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- https://github.com/nextcloud/android/pull/11242x_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2023-28646
Same Patch Batch · nextcloud · 2023-03-30 · 7 CVEs total
| CVE-2023-26482 | 9.1 CRITICAL | Scope of workflow operations is not validated in nextcloud server |
| CVE-2023-28644 | 5.7 MEDIUM | Reference fetch can saturate the server bandwidth for 10 seconds in nextcloud server |
| CVE-2023-28643 | 5.5 MEDIUM | Potential share collision for recipients when caching is enabled in nextcloud server |
| CVE-2023-28647 | 4.4 MEDIUM | App pin of the iOS app can be bypassed in Nextcloud iOS |
| CVE-2023-28835 | 3.5 LOW | Insecure randomness for default password in nextcloud |
| CVE-2023-28833 | 2.4 LOW | Unrestricted filenames for logo or favicon as admin in the theming settings in nextcloud s |
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