CVE-2024-27100: discourse DoS — Fix

Description

Discourse is an open source platform for community discussion. In affected versions the endpoints for suspending users, silencing users and exporting CSV files weren't enforcing limits on the sizes of the parameters that they accept. This could lead to excessive resource consumption which could render an instance inoperable. A site could be disrupted by either a malicious moderator on the same site or a malicious staff member on another site in the same multisite cluster. 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.

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CVSS v3.1 Score

6.5

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-400 Uncontrolled Resource Consumption

Affected Products

Vendor	Product	Versions
discourse	discourse	< 3.2.1
discourse	discourse	< 3.3.0

References

Advisories & Patches

https://github.com/discourse/discourse/commit/8cade1e825e90a66f440e820992d43c6905f4b47 https://github.com/discourse/discourse/commit/8cade1e825e90a66f440e820992d43c6905f4b47

Other References

https://github.com/discourse/discourse/security/advisories/GHSA-xq4v-qg27-gxgc https://github.com/discourse/discourse/security/advisories/GHSA-xq4v-qg27-gxgc

Frequently Asked Questions

What is CVE-2024-27100? +

Discourse is an open source platform for community discussion. In affected versions the endpoints for suspending users, silencing users and exporting CSV files weren't enforcing limits on the sizes of the parameters that they accept. This could lead to excessive resource consumption which could render an instance inoperable. A site could be disrupted by either a malicious moderator on the same site or a malicious staff member on another site in the same multisite cluster. 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. It has a CVSS v3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2024-27100? +

CVE-2024-27100 has a CVSS v3.1 score of 6.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2024-27100? +

CVE-2024-27100 affects products from discourse, specifically: discourse. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-27100? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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