CVE Vulnerability

CVE-2018-20164

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.)

5 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 10 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

Scope

5.3 /10

CVSS v3.0 : MEDIUM

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References
Link Resource
https://www.x41-dsec.de/lab/advisories/x41-2018-009-uaparser/ Exploit Third Party Advisory
https://github.com/ua-parser/uap-core/commit/156f7e12b215bddbaf3df4514c399d683e6cdadc Patch Third Party Advisory
https://github.com/ua-parser/uap-core/commit/010ccdc7303546cd22b9da687c29f4a996990014 Patch Third Party Advisory
https://github.com/ua-parser/uap-core/issues/332
Configurations

Configuration 1

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

Published : 2019-02-13 02:29

Updated : 2019-10-02 08:15

NVD link : CVE-2018-20164

Mitre link : CVE-2018-20164

Products Affected
No products.
CWE
CWE-185

Incorrect Regular Expression