title: Apache ShenYu (incubating) Regular expression denial of service
description: In Apache ShenYui, ShenYu-Bootstrap, RegexPredicateJudge.java uses Pattern.matches(conditionData.getParamValue(), realData) to make judgments, where both parameters are controllable by the user. This can cause an attacker pass in malicious regular expressions and characters causing a resource exhaustion. This issue affects Apache ShenYu (incubating) 2.4.0, 2.4.1 and 2.4.2 and is fixed in 2.4.3.
problem types: CWE-1333 Inefficient Regular Expression Complexity
affected:
{
product: Apache ShenYu (incubating)
vendor: Apache Software Foundation
versions:
lessThan: 2.4.3, status: affected, version: unspecified, versionType: custom
}
metrics:
other: [
content: {'other': 'moderate'}
type: unknown
]
workarounds: Upgrade to Apache ShenYu (incubating) 2.4.3 or apply patch https://github.com/apache/incubator-shenyu/pull/2975.