SB2023013005 - Incorrect Regular Expression in Discourse
Published: January 30, 2023
Security Bulletin ID
SB2023013005
Severity
High
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Incorrect Regular Expression (CVE-ID: CVE-2023-23621)
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.