CVE-2021-23937

描述

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.

如何修補 CVE-2021-23937

要修補 CVE-2021-23937,請將受影響套件升級到下列已修補版本。

• —升級至 9.3.0 或更新版本

CVE-2021-23937 正在被利用嗎?

低 — EPSS 為 4.3%,目前沒有觀察到大規模利用活動。

受影響套件(1)

• >= 9.0.0, < 9.3.0

CVSS 分數

參考連結(11)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2021-23937
• PATCHgithub.com/apache/wicket
• WEBwww.openwall.com/lists/oss-security/2021/05/25/2
• WEBgithub.com/apache/wicket/commit/84f62a5cff462eaa3bfaf171b0638c7e7feea30d