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CVE-2023-38684— Discourse vulnerable to ossible DDoS due to unbounded limits in various controller actions

Quick assessment

Affected
discourse discourse
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.

Discourse是一套开源的社区讨论平台。该平台包括社区、电子邮件和聊天室等功能。 Discourse 存在安全漏洞，该漏洞源于在多个控制器操作中，Discourse 接受限制参数，但不会对接受的值强加任何上限。 如果没有上限，该软件可能允许任意用户生成数据库查询，这最终可能会耗尽服务器上的资源。

CVSS 5.3 · Medium EPSS 0.64% · P49

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking
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I. Basic Information for CVE-2023-38684

Vulnerability Information
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Vulnerability Title
Discourse vulnerable to ossible DDoS due to unbounded limits in various controller actions
Source: CVE Program / CVE List V5
Vulnerability Description
Discourse is an open source discussion platform. Prior to version 3.0.6 of the `stable` branch and version 3.1.0.beta7 of the `beta` and `tests-passed` branches, in multiple controller actions, Discourse accepts limit params but does not impose any upper bound on the values being accepted. Without an upper bound, the software may allow arbitrary users to generate DB queries which may end up exhausting the resources on the server. The issue is patched in version 3.0.6 of the `stable` branch and version 3.1.0.beta7 of the `beta` and `tests-passed` branches. There are no known workarounds for this vulnerability.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5
Vulnerability Title
Discourse 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Discourse是一套开源的社区讨论平台。该平台包括社区、电子邮件和聊天室等功能。 Discourse 存在安全漏洞，该漏洞源于在多个控制器操作中，Discourse 接受限制参数，但不会对接受的值强加任何上限。 如果没有上限，该软件可能允许任意用户生成数据库查询，这最终可能会耗尽服务器上的资源。
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
discourse discourse >= 3.1.0.beta1, < 3.1.0.beta7 -

II. Public POCs for CVE-2023-38684

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III. Intelligence Information for CVE-2023-38684

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Patches & Fixes for CVE-2023-38684 (1)

Vendor Advisories for CVE-2023-38684 (1)

Same Patch Batch · discourse · 2023-07-28 · 6 CVEs total

CVE-2023-37467 6.8 MEDIUM Discourse CSP nonce reuse vulnerability for anonymous users
CVE-2023-38685 4.3 MEDIUM Discourse's restricted tag information visible to unauthenticated users
CVE-2023-38498 4.3 MEDIUM Discourse vulnerable to DoS via defer queue
CVE-2023-37906 4.3 MEDIUM Discourse vulnerable to DoS via post edit reason
CVE-2023-37904 2.6 LOW Discourse Race Condition in Accept Invite

IV. Related Vulnerabilities

Same product: discourse
Same vendor: discourse
Same weakness: CWE-770

V. Comments for CVE-2023-38684

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