What is CVE-2023-47120?

CVE-2023-47120 is a vulnerability in the Discourse platform that allows an attacker to deplete Redis memory by crafting a site with an abnormally long favicon URL.

How severe is CVE-2023-47120?

CVE-2023-47120 has a severity rating of 7.5 (high).

How can an attacker exploit CVE-2023-47120?

An attacker can exploit CVE-2023-47120 by crafting a site with an abnormally long favicon URL, which depletes Redis memory.

Are there any fixes available for CVE-2023-47120?

Yes, Discourse has released patches to fix CVE-2023-47120. It is recommended to update to the latest version of Discourse to mitigate the vulnerability.

Vulnerability/
CVE-2023-47120

high

7.5

CWE

770

10/11/2023

17/11/2023

CVE-2023-47120: Discourse DoS through Onebox favicon URL

Q: What versions of Discourse are affected by CVE-2023-47120?

Versions 3.1.0 through 3.1.2 of the stable branch and versions 3.1.0-beta6 through 3.2.0-beta2 of the beta and tests-passed branches are affected by CVE-2023-47120.

First published: Fri Nov 10 2023(Updated: )

Discourse is an open source platform for community discussion. In versions 3.1.0 through 3.1.2 of the `stable` branch and versions 3.1.0,beta6 through 3.2.0.beta2 of the `beta` and `tests-passed` branches, Redis memory can be depleted by crafting a site with an abnormally long favicon URL and drafting multiple posts which Onebox it. The issue is patched in version 3.1.3 of the `stable` branch and version 3.2.0.beta3 of the `beta` and `tests-passed` branches. There are no known workarounds.

Credit: security-advisories@github.com

Affected Software	Affected Version	How to fix
Discourse Discourse	>=3.1.0<3.1.3
Discourse Discourse	=3.1.0-beta6
Discourse Discourse	=3.1.0-beta7
Discourse Discourse	=3.1.0-beta8
Discourse Discourse	=3.2.0-beta1
Discourse Discourse	=3.2.0-beta2

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Reference Links

Frequently Asked Questions

What is CVE-2023-47120?
CVE-2023-47120 is a vulnerability in the Discourse platform that allows an attacker to deplete Redis memory by crafting a site with an abnormally long favicon URL.
What versions of Discourse are affected by CVE-2023-47120?
Versions 3.1.0 through 3.1.2 of the stable branch and versions 3.1.0-beta6 through 3.2.0-beta2 of the beta and tests-passed branches are affected by CVE-2023-47120.
How severe is CVE-2023-47120?
CVE-2023-47120 has a severity rating of 7.5 (high).
How can an attacker exploit CVE-2023-47120?
An attacker can exploit CVE-2023-47120 by crafting a site with an abnormally long favicon URL, which depletes Redis memory.
Are there any fixes available for CVE-2023-47120?
Yes, Discourse has released patches to fix CVE-2023-47120. It is recommended to update to the latest version of Discourse to mitigate the vulnerability.

collector/mitre-cve
collector/nvd-api
vendor/discourse
canonical/discourse discourse
version/discourse discourse/3.1.0
version/discourse discourse/3.1.0-beta6
version/discourse discourse/3.1.0-beta7
version/discourse discourse/3.1.0-beta8
version/discourse discourse/3.2.0-beta1
version/discourse discourse/3.2.0-beta2

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