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CVE-2022-23641— Denial of Service 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，该漏洞源于软件对于URL流解析存在问题。用户可以通过发布流URL来触发拒绝服务攻击。软件在后台作业中解析Oneboxes会触发无限循环，从而导致内存泄漏。

CVSS 6.5 · Medium EPSS 1.16% · P65
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I. Basic Information for CVE-2022-23641

Vulnerability Information
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Vulnerability Title
Denial of Service in Discourse
Source: CVE Program / CVE List V5
Vulnerability Description
Discourse is an open source discussion platform. In versions prior to 2.8.1 in the `stable` branch, 2.9.0.beta2 in the `beta` branch, and 2.9.0.beta2 in the `tests-passed` branch, users can trigger a Denial of Service attack by posting a streaming URL. Parsing Oneboxes in the background job trigger an infinite loop, which cause memory leaks. This issue is patched in version 2.8.1 of the `stable` branch, 2.9.0.beta2 of the `beta` branch, and 2.9.0.beta2 of the `tests-passed` branch. As a workaround, disable onebox in admin panel completely or specify allow list of domains that will be oneboxed.
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:H
Source: CVE Program / CVE List V5
Vulnerability Type
不可达退出条件的循环(无限循环)
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，该漏洞源于软件对于URL流解析存在问题。用户可以通过发布流URL来触发拒绝服务攻击。软件在后台作业中解析Oneboxes会触发无限循环，从而导致内存泄漏。
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 <= 2.8.0 -

II. Public POCs for CVE-2022-23641

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III. Intelligence Information for CVE-2022-23641

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Patches & Fixes for CVE-2022-23641 (2)

Vendor Advisories for CVE-2022-23641 (1)

IV. Related Vulnerabilities

Same product: discourse
Same vendor: discourse
Same weakness: CWE-835

V. Comments for CVE-2022-23641

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