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.)

Score

CVSS 3.0 5.3 Medium

Status

Modified - cve@mitre.org

Published

2019-02-13

Last modified

2024-08-05

Weaknesses

CWE-185

Affected products

• User Agent Parser-core (Uaparser)

References

• https://github.com/ua-parser/uap-core/commit/010ccdc7303546cd22b9da687c29f4a996990014
• https://github.com/ua-parser/uap-core/commit/156f7e12b215bddbaf3df4514c399d683e6cdadc
• https://github.com/ua-parser/uap-core/issues/332
• https://www.x41-dsec.de/lab/advisories/x41-2018-009-uaparser/