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CVE-2023-28847— Nextcloud Server missing brute force protection for passwords of password protected share links

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存在安全漏洞，该漏洞源于在验证共享链接的密码方面不受限制。攻击者利用该漏洞可以暴力破解密码。以下产品及版本受到影响：Nextcloud Server 24.0.0版本至24.0.11之前版本、25.0.0版本至25.0.5之前版本，Nextcloud Server Enterprise 23.0.0版本至23.0.12.6之前版本、24.0.0版本至24.0.11之前版本、25.

CVSS 3.1 · Low EPSS 0.77% · P54

Possible ATT&CK Techniques 1 AI

T1110 · Brute Force
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I. Basic Information for CVE-2023-28847

Vulnerability Information
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Vulnerability Title
Nextcloud Server missing brute force protection for passwords of password protected share links
Source: CVE Program / CVE List V5
Vulnerability Description
Nextcloud Server is the file server software for Nextcloud, a self-hosted productivity platform. In Nextcloud Server 24.0.0 prior to 24.0.11 and 25.0.0 prior to 25.0.5; as well as Nextcloud Server Enterprise 23.0.0 prior to 23.0.12.6, 24.0.0 prior to 24.0.11, and 25.0.0 prior to 25.0.5; an attacker is not restricted in verifying passwords of share links so they can just start brute forcing the password. Nextcloud Server 24.0.11 and 25.0.5 and Nextcloud Enterprise Server 23.0.12.6, 24.0.11, and 25.0.5 contain a fix for this issue. No known workarounds are available.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/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存在安全漏洞，该漏洞源于在验证共享链接的密码方面不受限制。攻击者利用该漏洞可以暴力破解密码。以下产品及版本受到影响：Nextcloud Server 24.0.0版本至24.0.11之前版本、25.0.0版本至25.0.5之前版本，Nextcloud Server Enterprise 23.0.0版本至23.0.12.6之前版本、24.0.0版本至24.0.11之前版本、25.
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 >= 23.0.0, < 23.0.12.6 -

II. Public POCs for CVE-2023-28847

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III. Intelligence Information for CVE-2023-28847

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Patches & Fixes for CVE-2023-28847 (1)

Vendor Advisories for CVE-2023-28847 (1)

Other References for CVE-2023-28847 (1)

IV. Related Vulnerabilities

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

V. Comments for CVE-2023-28847

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