CVE-2023-47120: Discourse DoS through Onebox favicon URL
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 |
|---|---|---|
| >=3.1.0<3.1.3 | ||
| =3.1.0-beta6 | ||
| =3.1.0-beta7 | ||
| =3.1.0-beta8 | ||
| =3.2.0-beta1 | ||
| =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.
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- agent/first-publish-date
- agent/weakness
- agent/severity
- agent/references
- agent/title
- agent/author
- agent/description
- collector/mitre-cve
- source/MITRE
- collector/nvd-api
- source/NVD
- agent/software-canonical-lookup
- agent/last-modified-date
- agent/softwarecombine
- agent/tags
- agent/event
- 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