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CVE-2023-30606— Multisite denial of service through unsanitized dynamic dispatch to SiteSetting in Discourse

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，该漏洞源于以管理员身份登录的用户可以调用SiteSetting类上的任意方法，当在多站点上完成时，可以影响整个集群。受影响的产品和版本：Discourse stable 3.0.1及之前版本，beta 3.1.0.beta2及之前版本，tests-passed 3.1.0.beta2及之前版本。

CVSS 4.2 · Medium EPSS 0.39% · P31

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2023-30606

Vulnerability Information
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Vulnerability Title
Multisite denial of service through unsanitized dynamic dispatch to SiteSetting in Discourse
Source: CVE Program / CVE List V5
Vulnerability Description
Discourse is an open source platform for community discussion. In affected versions a user logged as an administrator can call arbitrary methods on the `SiteSetting` class, notably `#clear_cache!` and `#notify_changed!`, which when done on a multisite instance, can affect the entire cluster resulting in a denial of service. Users not running in multisite environments are not affected. This issue is patched in the latest stable, beta and tests-passed versions of Discourse. Users are advised to upgrade. There are no known workarounds for this vulnerability.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
关键资源的不正确权限授予
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，该漏洞源于以管理员身份登录的用户可以调用SiteSetting类上的任意方法，当在多站点上完成时，可以影响整个集群。受影响的产品和版本：Discourse stable 3.0.1及之前版本，beta 3.1.0.beta2及之前版本，tests-passed 3.1.0.beta2及之前版本。
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 stable: < 3.0.2 -

II. Public POCs for CVE-2023-30606

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III. Intelligence Information for CVE-2023-30606

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Vendor Advisories for CVE-2023-30606 (1)

Same Patch Batch · discourse · 2023-04-18 · 4 CVEs total

CVE-2023-30538 5.4 MEDIUM Stored Cross-site Scripting via improper sanitization of svg files in Discourse
CVE-2023-29196 4.2 MEDIUM HTML injection via topic embedding in Discourse
CVE-2023-28440 2.7 LOW Denial of service via admin theme import route in Discourse

IV. Related Vulnerabilities

Same product: discourse
Same vendor: discourse
Same weakness: CWE-732

V. Comments for CVE-2023-30606

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