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Vulnerability · Published Jul 10, 2025 · Assigned by apache

CVE-2024-43394Apache HTTP Server: SSRF on Windows due to UNC paths

High 7.5

In plain English

A high-severity server-side request forgery in Apache HTTP Server from Apache Software Foundation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.3% (higher than 70% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)1.3%top 30.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Alpine:v3.20apache22.4.64-r0ALPINE-CVE-2024-43394
Alpine:v3.21apache22.4.64-r0ALPINE-CVE-2024-43394
Alpine:v3.22apache22.4.64-r0ALPINE-CVE-2024-43394
Alpine:v3.23apache22.4.64-r0ALPINE-CVE-2024-43394
Alpine:v3.24apache22.4.64-r0ALPINE-CVE-2024-43394
Ubuntu:22.04:LTSapache2no fix listedUBUNTU-CVE-2024-43394
Ubuntu:24.04:LTSapache2no fix listedUBUNTU-CVE-2024-43394

Affected products (as reported)

VendorProductVersions
Apache Software Foundation Apache HTTP Server 2.4.0 – through 2.4.63

Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References