UA-Parser UAP-Core up to 0.5.x regex.yaml User-Agent incorrect regex

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
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CTI Interest Score
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5.2$0-$5k0.00

Summaryinfo

A vulnerability described as problematic has been identified in UA-Parser UAP-Core up to 0.5.x. This vulnerability affects unknown code of the file regex.yaml. Executing a manipulation of the argument User-Agent as part of HTTP Header can lead to incorrect regex. This vulnerability is registered as CVE-2018-20164. It is possible to launch the attack remotely. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as problematic was found in UA-Parser UAP-Core up to 0.5.x. This vulnerability affects an unknown code block of the file regex.yaml. The manipulation of the argument User-Agent as part of a HTTP Header leads to a incorrect regex vulnerability. The CWE definition for the vulnerability is CWE-185. The product specifies a regular expression in a way that causes data to be improperly matched or compared. As an impact it is known to affect availability. CVE summarizes:

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.)

The bug was discovered 01/10/2019. The weakness was published 02/13/2019. This vulnerability was named CVE-2018-20164 since 12/15/2018. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 34 days. During that time the estimated underground price was around $0-$5k.

Upgrading to version 0.6.0 eliminates this vulnerability.

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Productinfo

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.2

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.3
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Incorrect regex
CWE: CWE-185 / CWE-697
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: UAP-Core 0.6.0
Patch: github.com

Timelineinfo

12/15/2018 🔍
01/10/2019 +26 days 🔍
02/13/2019 +34 days 🔍
02/14/2019 +1 days 🔍
07/10/2023 +1607 days 🔍

Sourcesinfo

Product: github.com

Advisory: 010ccdc7303546cd22b9da687c29f4a996990014
Status: Not defined

CVE: CVE-2018-20164 (🔍)
GCVE (CVE): GCVE-0-2018-20164
GCVE (VulDB): GCVE-100-130870

Entryinfo

Created: 02/14/2019 11:27
Updated: 07/10/2023 10:59
Changes: 02/14/2019 11:27 (57), 05/10/2020 14:21 (1), 07/10/2023 10:52 (6), 07/10/2023 10:59 (1)
Complete: 🔍
Cache ID: 216::103

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