title: Apache Tomcat: HTTP/2 header handling DoS
description: Denial of Service due to improper input validation vulnerability for HTTP/2 requests in Apache Tomcat. When processing an HTTP/2 request, if the request exceeded any of the configured limits for headers, the associated HTTP/2 stream was not reset until after all of the headers had been processed.This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.0-M16, from 10.1.0-M1 through 10.1.18, from 9.0.0-M1 through 9.0.85, from 8.5.0 through 8.5.98.
Users are recommended to upgrade to version 11.0.0-M17, 10.1.19, 9.0.86 or 8.5.99 which fix the issue.
problem types: CWE-20 Improper Input Validation
affected:
{
defaultStatus: unaffected
product: Apache Tomcat
vendor: Apache Software Foundation
versions:
lessThanOrEqual: 11.0.0-M16, status: affected, version: 11.0.0-M1, versionType: semver
lessThanOrEqual: 10.1.18, status: affected, version: 10.1.0-M1, versionType: semver
lessThanOrEqual: 9.0.85, status: affected, version: 9.0.0-M1, versionType: semver
lessThanOrEqual: 8.5.98, status: affected, version: 8.5.0, versionType: semver
}
metrics:
other: [
content: {'text': 'important'}
type: Textual description of severity
]