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CVE-2018-20164

N/A
Published: February 13, 2019 at 02:00 PM UTC
Updated: June 17, 2026 at 01:52 AM UTC
1 product affected across 1 vendorUser Agent Parser Core

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Severity
N/A
Exploit prediction
EPSS 3%

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.)

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

User Agent Parser Core· Uaparser
95%
v < 0.6.0
Affected range stops below 0.6.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (4)

x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/ua-parser/uap-core/commit/010ccdc7303546cd22b9da687c29f4a996990014
x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/ua-parser/uap-core/commit/156f7e12b215bddbaf3df4514c399d683e6cdadc
x_refsource_MISC
Source: [email protected]
https://github.com/ua-parser/uap-core/issues/332
x_refsource_MISCExploitThird Party Advisory
Source: [email protected]
https://www.x41-dsec.de/lab/advisories/x41-2018-009-uaparser/

CVSS

5MEDIUM[email protected]
Confidentiality
NONE
Integrity
NONE
Availability
PARTIAL
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-185

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