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CVE-2022-29243— Improper input-size validation on the user new session name 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 22.2.0 到 23.0.3 版本存在资源管理错误漏洞，该漏洞源于应用程序无法正确控制内部资源的消耗。远程攻击者利用该漏洞可执行拒绝服务 （DoS）攻击。

CVSS 4.3 · Medium EPSS 1.50% · P73

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2022-29243

Vulnerability Information
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Vulnerability Title
Improper input-size validation on the user new session name in Nextcloud Server
Source: CVE Program / CVE List V5
Vulnerability Description
Nextcloud Server is the file server software for Nextcloud, a self-hosted productivity platform. Prior to versions 22.2.7 and 23.0.4, missing input-size validation of new session names allows users to create app passwords with long names. These long names are then loaded into memory on usage, resulting in impacted performance. Versions 22.2.7 and 23.0.4 contain a fix for this issue. There are currently no known workarounds available.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Nextcloud 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 22.2.0 到 23.0.3 版本存在资源管理错误漏洞，该漏洞源于应用程序无法正确控制内部资源的消耗。远程攻击者利用该漏洞可执行拒绝服务 （DoS）攻击。
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 < 22.2.7 -

II. Public POCs for CVE-2022-29243

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III. Intelligence Information for CVE-2022-29243

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Patches & Fixes for CVE-2022-29243 (1)

Vendor Advisories for CVE-2022-29243 (2)

Other References for CVE-2022-29243 (1)

IV. Related Vulnerabilities

Same product: security-advisories
Same vendor: nextcloud
Same weakness: CWE-20

V. Comments for CVE-2022-29243

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