Server-Side Request Forgery in Apache HTTP Server on Windows
CVE-2024-43394

7.5HIGH

Key Information:

Vendor

Apache
Status
Apache Http Server
Vendor
CVE Published:
10 July 2025

What is CVE-2024-43394?

A vulnerability in Apache HTTP Server for Windows allows for potential Server-Side Request Forgery. This can lead to the exposure of NTLM hashes to an attacker-controlled server. The flaw arises through the use of mod_rewrite or other Apache expressions that fail to properly validate request input. Systems running affected versions of Apache HTTP Server should implement limited connectivity settings for SMB to mitigate risks associated with NTLM authentication. As the Apache HTTP Server Project raises standards for reporting SSRF vulnerabilities, users are advised to secure their configurations against this targeted threat.

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Affected Version(s)

Apache HTTP Server 2.4.0 <= 2.4.63

References

https://httpd.apache.org/security/vulnerabilities_24.html
vendor-advisory

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Kainan Zhang (@4xpl0r3r) from Fortinet
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