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Vulnerability · Published May 25, 2021 · Assigned by apache

CVE-2021-23937DNS proxy and possible amplification attack

High 7.5

In plain English

A high-severity security flaw in Apache Wicket from Apache Software Foundation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 4.3% (higher than 91% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)7.5High
Exploit odds (30 days)4.3%top 8.9% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

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 & fixed versions

EcosystemPackageFixed inAdvisory
Mavenorg.apache.wicket:wicket-core9.3.0GHSA-hmhg-95wh-r699
Mavenorg.apache.wicket:wicket-core8.12.0GHSA-hmhg-95wh-r699
Mavenorg.apache.wicket:wicket-core7.18.0GHSA-hmhg-95wh-r699

Affected products (as reported)

VendorProductVersions
Apache Software Foundation Apache Wicket Apache Wicket 9.x – through 9.2.0Apache Wicket 8.x – through 8.11.0Apache Wicket 7.x – through 7.17.06.2.0 – before Apache Wicket 6.x*

References