CVE-2022-24741— High memory usage 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 存在资源管理错误漏洞，攻击者可以通过上传特制文件来导致拒绝服务，这将导致服务器分配过多的内存/CPU。
Possible ATT&CK Techniques 1 AI
T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2022-24741
Vulnerability Information
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Vulnerability Title
High memory usage in Nextcloud server
Source: CVE Program / CVE List V5
Vulnerability Description
Nextcloud server is an open source, self hosted cloud style services platform. In affected versions an attacker can cause a denial of service by uploading specially crafted files which will cause the server to allocate too much memory / CPU. It is recommended that the Nextcloud Server is upgraded to 21.0.8 , 22.2.4 or 23.0.1. Users unable to upgrade should disable preview generation with the `'enable_previews'` config flag.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Vulnerability Title
Nextcloud server 资源管理错误漏洞
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 存在资源管理错误漏洞，攻击者可以通过上传特制文件来导致拒绝服务，这将导致服务器分配过多的内存/CPU。
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 | < 21.0.8 | - |
|
II. Public POCs for CVE-2022-24741
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2022-24741 (1)
-
https://github.com/nextcloud/server/pull/30291 x_refsource_MISC
Vendor Advisories for CVE-2022-24741 (2)
Other References for CVE-2022-24741 (1)
-
https://hackerone.com/reports/1261225 x_refsource_MISC
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V. Comments for CVE-2022-24741
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