Is CVE-2018-20164 actively exploited?

CVE-2018-20164 has no public evidence of in-the-wild exploitation as of 2024-11-21.

What is the CVSS score for CVE-2018-20164?

CVE-2018-20164 has a CVSS score of 5.3 (MEDIUM severity). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

How do I patch CVE-2018-20164?

Patch guidance is available from uaparser security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2018-20164.

Which products are affected by CVE-2018-20164?

1 product: uaparser user agent parser-core.

CVE-2018-20164 - remediation guidance & executive summary

Description

An issue was discovered in regex.yaml (aka regexes.yaml) in UA-Parser UAP-Core before 0.6.0. A Regular Expression Denial of Service (ReDoS) issue allows remote attackers to overload a server by setting the User-Agent header in an HTTP(S) request to a value containing a long digit string. (The UAP-Core project contains the vulnerability, propagating to all implementations.)

CVSS Metrics

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack Vector: network
Complexity: low
Privileges: none
User Action: none
Scope: unchanged
Confidentiality: none
Integrity: none
Availability: low
Weaknesses: CWE-185

Metadata

Primary Vendor: UAPARSER
Published: 2/13/2019
Last Modified: 11/21/2024
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

uaparser : user_agent_parser-core

Remediation Guidance

Executive Summary

Cite this page

CVE-2018-20164. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2018-20164

View on NIST NVD

CVE-2018-20164 vulnerability