Information disclosure in Apache Wicket
CVE-2021-23937
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.
Vulnerability class: Information Disclosure
EPSS: 0.043 (90.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Apache Wicket
- Apache Software Foundation Wicket — versions Apache Wicket 9.x, Apache Wicket 8.x, Apache Wicket 7.x
Weakness classification (CWE)
References
- security@apache.org (Mailing List, x_refsource_MISC, Release Notes, Vendor Advisory)
- security@apache.org (mailing-list, x_refsource_MLIST)
- security@apache.org (mailing-list, x_refsource_MLIST)
- security@apache.org (mailing-list, x_refsource_MLIST)
Frequently asked questions
- What is CVE-2021-23937?
- CVE-2021-23937 is a high-severity vulnerability in Apache Wicket, classified under Information Disclosure. CVSS score: 7.5/10. Published 2021-05-25.
- How severe is CVE-2021-23937?
- High severity. CVSS v3 base score is 7.5 out of 10.