#VU71617 Incorrect Regular Expression in Discourse - CVE-2023-23621

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Main Vulnerability Database Vulnerabilities #VU71617

#VU71617 Incorrect Regular Expression in Discourse - CVE-2023-23621

Published: January 30, 2023


Vulnerability identifier: #VU71617
Vulnerability risk: High
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2023-23621
CWE-ID: CWE-185
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Discourse
Software vendor:
Civilized Discourse Construction Kit, Inc.

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient input validation when processing regular expressions. A remote attacker can use a specially crafted user agent and perform regular expression denial of service (ReDos) attack.


Remediation

Install update from vendor's website.

External links