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CVE-2021-23937

DNS based denial of service in Apache Wicket

Impact

A DNS proxy and possible amplification attack vulnerability in WebClientInfo of Apache Wicket allows an attacker to trigger arbitrary DNS lookups from the server when the X-Forwarded-For header is not properly sanitized. This DNS lookup can be engineered to overload an internal DNS server or to slow down request processing of the Apache Wicket application causing a possible denial of service on either the internal infrastructure or the web application itself. This issue affects Apache Wicket Apache Wicket 9.x version 9.2.0 and prior versions; Apache Wicket 8.x version 8.11.0 and prior versions; Apache Wicket 7.x version 7.17.0 and prior versions and Apache Wicket 6.x version 6.2.0 and later versions.

Affected packages

EcosystemPackageAffectedFixed in
mavenorg.apache.wicket:wicket-core>= 9.0.0, < 9.3.09.3.0

Affected products

VendorProductAffected versions
ApacheWicket
from 6.0.0 through 6.2.0
from 7.0.0 through 7.17.0
from 8.0.0 through 8.11.0
from 9.0.0 through 9.2.0

Weakness classification

CWE-200CWE-20

References