SB2021110231 - Regular expression denial of service in validator.js
Published: November 2, 2021 Updated: October 12, 2022
Security Bulletin ID
SB2021110231
CSH Severity
Medium
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 vulnerability.
1) Incorrect Regular Expression (CVE-ID: CVE-2021-3765)
CWE-ID: CWE-185 - Incorrect Regular Expression
CVSSv4: 8.7 [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]
The vulnerability allows a remote attacker to perform a regular expression denial of service (ReDoS) attack.
The vulnerability exists due to improper input validation when handling user-supplied input. A remote attacker can pass specially crafted data to the application and perform a regular expression denial of service (ReDoS) attack.
Remediation
Install update from vendor's website.