CVE-2024-43394: apache software foundation apache http server Server-Side Request Forgery (SSRF)

Vulnerability summary

CVE-2024-43394 is a high (CVSS 7.5) Server-Side Request Forgery (SSRF) vulnerability in apache software foundation apache http server. EPSS estimates a 1.27% chance of exploitation in the next 30 days, higher than 69.3% of scored vulnerabilities.

Timeline

1. 10-07-2025
   PublishedVulnerability first disclosed.
2. 04-11-2025
   Last modifiedVulnerability information updated.

Description

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.

• CWE-918Server-Side Request Forgery (SSRF)The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.