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.)
References (4)
Core 4
Core References
Issue Tracking x_refsource_misc
https://github.com/ua-parser/uap-core/issues/332
Patch, Third Party Advisory x_refsource_misc
https://github.com/ua-parser/uap-core/commit/010ccdc7303546cd22b9da687c29f4a996990014
Patch, Third Party Advisory x_refsource_misc
https://github.com/ua-parser/uap-core/commit/156f7e12b215bddbaf3df4514c399d683e6cdadc
Exploit, Third Party Advisory x_refsource_misc
https://www.x41-dsec.de/lab/advisories/x41-2018-009-uaparser/
Scores
CVSS v3
5.3
EPSS
0.0097
EPSS Percentile
76.7%
Attack Vector
NETWORK
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Details
CWE
CWE-185
Status
published
Products (2)
npm/uap-core
0 - 0.6.0npm
uaparser/user_agent_parser-core
< 0.6.0
Published
Feb 13, 2019
Tracked Since
Feb 18, 2026