CVE-2024-43394

Server-Side Request Forgery (SSRF) in Apache HTTP Server on Windows allows to potentially leak NTLM hashes to a malicious server via  mod_rewrite or apache expressions that pass unvalidated request input. This issue affects Apache HTTP Server: from 2.4.0 through 2.4.63. Note:  The Apache HTTP Server Project will be setting a higher bar for accepting vulnerability reports regarding SSRF via UNC paths. The server offers limited protection against administrators directing the server to open UNC paths. Windows servers should limit the hosts they will connect over via SMB based on the nature of NTLM authentication.

Score

CVSS 3.1 7.5 High

Status

Modified - security@apache.org

Published

2025-07-10

Last modified

2025-11-04

Weaknesses

CWE-918

Affected products

• Http Server (Apache)
• Apache Http Server (Apache Software Foundation)

References

• https://httpd.apache.org/security/vulnerabilities_24.html
• http://www.openwall.com/lists/oss-security/2025/07/10/2
• http://www.openwall.com/lists/oss-security/2025/07/10/5
• https://lists.debian.org/debian-lts-announce/2025/08/msg00009.html