CVE-2023-45806

Discourse vulnerable to DoS via Regexp Injection in Full Name

Severity Score

5.4

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Track

*SSVC

Descriptions

Discourse is an open source platform for community discussion. Prior to version 3.1.3 of the `stable` branch and version 3.2.0.beta3 of the `beta` and `tests-passed` branches, if a user has been quoted and uses a `|` in their full name, they might be able to trigger a bug that generates a lot of duplicate content in all the posts they've been quoted by updating their full name again. Version 3.1.3 of the `stable` branch and version 3.2.0.beta3 of the `beta` and `tests-passed` branches contain a patch for this issue. No known workaround exists, although one can stop the "bleeding" by ensuring users only use alphanumeric characters in their full name field.

Discourse es una plataforma de código abierto para el debate comunitario. Antes de la versión 3.1.3 de la rama `stable` y la versión 3.2.0.beta3 de las ramas `beta` y `tests-passed`, si un usuario ha sido citado y usa un `|` en su nombre completo, podría desencadenar un error que genere una gran cantidad de contenido duplicado en todas las publicaciones que han sido citados al actualizar su nombre completo nuevamente. La versión 3.1.3 de la rama `stable` y la versión 3.2.0.beta3 de las ramas `beta` y `tests-passed` contienen un parche para este problema. No existe ningún workaround conocido, aunque se puede detener el "sangrado" asegurándose de que los usuarios sólo utilicen caracteres alfanuméricos en el campo de nombre completo.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

Low

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

* Common Vulnerability Scoring System

SSVC

Decision:Track

Exploitation

None

Automatable

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2023-10-13 CVE Reserved
2023-11-10 CVE Published
2023-11-18 EPSS Updated
2024-09-03 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-1333: Inefficient Regular Expression Complexity

CAPEC

References (3)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC
https://github.com/discourse/discourse/commit/2ec25105179199cf80912bf011c18b8b870e1863	2023-11-17
https://github.com/discourse/discourse/commit/7d484864fe91ff79c478f57e7ddb1235d701921e	2023-11-17
https://github.com/discourse/discourse/security/advisories/GHSA-hcgf-hg2g-mw78	2023-11-17

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Discourse Search vendor "Discourse"		Discourse Search vendor "Discourse" for product "Discourse"				< 3.1.3 Search vendor "Discourse" for product "Discourse" and version " < 3.1.3"		stable		Affected
Discourse Search vendor "Discourse"		Discourse Search vendor "Discourse" for product "Discourse"				< 3.2.0 Search vendor "Discourse" for product "Discourse" and version " < 3.2.0"		beta		Affected
Discourse Search vendor "Discourse"		Discourse Search vendor "Discourse" for product "Discourse"				3.2.0 Search vendor "Discourse" for product "Discourse" and version "3.2.0"		beta1, beta		Affected
Discourse Search vendor "Discourse"		Discourse Search vendor "Discourse" for product "Discourse"				3.2.0 Search vendor "Discourse" for product "Discourse" and version "3.2.0"		beta2, beta		Affected