CVE-2023-28844— User without download rights can download older version of that file in nextcloud server
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 server存在访问控制错误漏洞，该漏洞源于不能够下载文件的用户仍然可以下载旧版本。
Possible ATT&CK Techniques 1 AI
T1530 · Data from Cloud Storage
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I. Basic Information for CVE-2023-28844
Vulnerability Information
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Vulnerability Title
User without download rights can download older version of that file in nextcloud server
Source: CVE Program / CVE List V5
Vulnerability Description
Nextcloud server is an open source home cloud implementation. In affected versions users that should not be able to download a file can still download an older version and use that for uncontrolled distribution. This issue has been addressed in versions 24.0.10 and 25.0.4. Users are advised to upgrade. There are no known workarounds for this vulnerability.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Nextcloud 访问控制错误漏洞
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 server存在访问控制错误漏洞，该漏洞源于不能够下载文件的用户仍然可以下载旧版本。
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 | >= 25.0.0, < 25.0.4 | - |
|
II. Public POCs for CVE-2023-28844
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2023-28844 (1)
-
https://github.com/nextcloud/server/pull/36113 x_refsource_MISC
Vendor Advisories for CVE-2023-28844 (1)
Same Patch Batch · nextcloud · 2023-03-31 · 3 CVEs total
| CVE-2023-28645 | 5.7 MEDIUM | Secure view can be bypassed by using internal API endpoint in Nextcloud richdocuments |
| CVE-2023-28845 | 3.5 LOW | Chat room membership disclosed via autocompletion in Nextcloud talk |
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V. Comments for CVE-2023-28844
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