CVE-2024-39573: 
Apache HTTP Server vulnerability analysis and mitigation

A potential Server-Side Request Forgery (SSRF) vulnerability was discovered in the modrewrite module of Apache HTTP Server versions 2.4.59 and earlier. The vulnerability (CVE-2024-39573) allows an attacker to cause unsafe RewriteRules to unexpectedly set up URLs to be handled by modproxy. This vulnerability was discovered by Orange Tsai from DEVCORE and was publicly disclosed on July 1, 2024 (Apache Advisory, OSS Security).

The vulnerability exists in the modrewrite module's handling of URL rewriting rules. When certain RewriteRule configurations are used, an attacker can manipulate the request in a way that causes the server to unexpectedly forward requests through modproxy, potentially leading to SSRF attacks. The vulnerability has been assigned a CVSS v3.1 base score of 7.5 (HIGH) with the vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N (NetApp Advisory).

The successful exploitation of this vulnerability could lead to Server-Side Request Forgery (SSRF) attacks, allowing attackers to cause the server to make unauthorized requests to internal or external systems. This could potentially result in the disclosure of sensitive information or unauthorized access to internal resources (NetApp Advisory).

Users are recommended to upgrade to Apache HTTP Server version 2.4.60 or later, which contains the fix for this vulnerability. The issue has been addressed in the updated version, preventing the unsafe handling of RewriteRules (Apache Advisory).