CVE-2023-49790— App PIN code can be bypassed in Nextcloud Files iOS
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 4.9.2之前版本存在授权问题漏洞，该漏洞源于无需提供4位PIN码允许用户与自托管生产力平台进行交互。
Possible ATT&CK Techniques 1 AI
T1078 · Valid Accounts
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I. Basic Information for CVE-2023-49790
Vulnerability Information
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Vulnerability Title
App PIN code can be bypassed in Nextcloud Files iOS
Source: CVE Program / CVE List V5
Vulnerability Description
The Nextcloud iOS Files app allows users of iOS to interact with Nextcloud, a self-hosted productivity platform. Prior to version 4.9.2, the application can be used without providing the 4 digit PIN code. Nextcloud iOS Files app should be upgraded to 4.9.2 to receive the patch. No known workarounds are available.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Nextcloud 授权问题漏洞
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 4.9.2之前版本存在授权问题漏洞，该漏洞源于无需提供4位PIN码允许用户与自托管生产力平台进行交互。
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 | < 4.9.2 | - |
|
II. Public POCs for CVE-2023-49790
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2023-49790 (1)
-
https://github.com/nextcloud/ios/pull/2665 x_refsource_MISC
Vendor Advisories for CVE-2023-49790 (1)
Other References for CVE-2023-49790 (1)
-
https://hackerone.com/reports/2245437 x_refsource_MISC
Same Patch Batch · nextcloud · 2023-12-22 · 3 CVEs total
| CVE-2023-49791 | 5.4 MEDIUM | Workflows do not require password confirmation on API level |
| CVE-2023-49792 | 5.3 MEDIUM | Bruteforce protection can be bypassed with misconfigured proxy |
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V. Comments for CVE-2023-49790
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