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CVE-2023-32320— Nextcloud Server's brute force protection allows someone to send more requests than intended

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 25.0.7 、 26.0.2 版本， Nextcloud Enterprise Server 21.0.9.12、22.2.10.12、 23.0.12.7、24.0.12.2、25.0.7 和 26.0.2 版本存在安全漏洞，该漏洞源于当并行发送多个请求时，即使在响应发送到客户端时，错误请求的数量已超过限制，所有请求都会被执行。

CVSS 8.7 · High EPSS 0.87% · P58

Possible ATT&CK Techniques 1 AI

T1110 · Brute Force
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I. Basic Information for CVE-2023-32320

Vulnerability Information
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Vulnerability Title
Nextcloud Server's brute force protection allows someone to send more requests than intended
Source: CVE Program / CVE List V5
Vulnerability Description
Nextcloud Server is a data storage system for Nextcloud, a self-hosted productivity platform. When multiple requests are sent in parallel, all of them were executed even if the amount of faulty requests succeeded the limit by the time the response was sent to the client. This allowed someone to send as many requests the server could handle in parallel to bruteforce protected details instead of the configured limit, default 8. Nextcloud Server versions 25.0.7 and 26.0.2 and Nextcloud Enterprise Server versions 21.0.9.12, 22.2.10.12, 23.0.12.7, 24.0.12.2, 25.0.7 and 26.0.2 contain patches for this issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
过多认证尝试的限制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Nextcloud 安全漏洞
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 25.0.7 、 26.0.2 版本， Nextcloud Enterprise Server 21.0.9.12、22.2.10.12、 23.0.12.7、24.0.12.2、25.0.7 和 26.0.2 版本存在安全漏洞，该漏洞源于当并行发送多个请求时，即使在响应发送到客户端时，错误请求的数量已超过限制，所有请求都会被执行。
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 Nextcloud Server >= 25.0.0, < 25.0.7 -

II. Public POCs for CVE-2023-32320

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III. Intelligence Information for CVE-2023-32320

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Patches & Fixes for CVE-2023-32320 (1)

Vendor Advisories for CVE-2023-32320 (1)

Other References for CVE-2023-32320 (1)

IV. Related Vulnerabilities

Same product: security-advisories
Same vendor: nextcloud
Same weakness: CWE-307

V. Comments for CVE-2023-32320

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