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VULNERABILITIES

CVE-2018-20164 Details

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.)

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:5.3 MEDIUMVector:CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/ua-parser/uap-core/commit/010ccdc7303546cd22b9da687c29f4a996990014 CVEPatchThird Party Advisory
https://github.com/ua-parser/uap-core/commit/156f7e12b215bddbaf3df4514c399d683e6cdadc CVEPatchThird Party Advisory
https://github.com/ua-parser/uap-core/issues/332 CVE
https://www.x41-dsec.de/lab/advisories/x41-2018-009-uaparser/ CVEExploitThird Party Advisory
https://github.com/ua-parser/uap-core/commit/010ccdc7303546cd22b9da687c29f4a996990014 [email protected]PatchThird Party Advisory

see all 8 references

Weakness Enumeration

CWE-IDCWE NameSource
CWE-185Incorrect Regular Expression[email protected]

Affected Products

ProductVersions
uaparser user agent parser-core
< 0.6.0

CPE

  • cpe:2.3:a:uaparser:user_agent_parser-core:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

5 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2018-20164
NVD Published Date:
Feb 13, 2019
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2018-20164 Details - Not Deferred