CVE-2024-43394

Apache HTTP Server: SSRF on Windows due to UNC paths

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.

Scores

Weaknesses (CWE)

• CWE-918

European references

• ENISA EUVD · EUVD-2024-54772
• GCVE · GCVE-0-2024-43394

CERT-FR advisories

• CERTFR-2025-AVI-1065 — Multiples vulnérabilités dans NetApp ONTAP · cert.ssi.gouv.fr
• CERTFR-2025-AVI-0751 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
• CERTFR-2025-AVI-0586 — Multiples vulnérabilités dans Apache HTTP Server · cert.ssi.gouv.fr

Affected configurations (NVD CPE)

• cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:* ≥ 2.4.0 < 2.4.64

Affected products

References

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

Sources