CVE-2021-23937
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.
How to fix
- org.apache.wicket:wicket-core9.3.0, 8.12.0, 7.18.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| apache wicket | 6.0.0 ≤ v ≤ 6.2.0, 7.0.0 ≤ v ≤ 7.17.0, 8.0.0 ≤ v ≤ 8.11.0, 9.0.0 ≤ v ≤ 9.2.0 | — |
| org.apache.wicket:wicket-coreMaven | 9.0.0 ≤ v < 9.3.0, 8.0.0 ≤ v < 8.12.0, v < 7.18.0 | 9.3.0, 8.12.0, 7.18.0 |
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Attack Surface Management
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