Apache mod_proxy Server-Side Request Forgery (SSRF)
Actively exploited in the wild. Patch or mitigate immediately — don't wait for a maintenance window.
An unauthenticated attacker, remotely over the network, with no user interaction, can fully compromise the system — steal data, tamper with it and take it offline.
A crafted request uri-path can cause mod_proxy to forward the request to an origin server choosen by the remote user. This issue affects Apache HTTP Server 2.4.48 and earlier.
Inferred from the weakness type (CWE) and how the flaw is reached — the techniques an attacker would chain to exploit this. Real-world corroboration appears here as threat intel is folded in.
Corroborated threat activity referencing this CVE — with source and confidence, not inference.
Named threat actors and observed ATT&CK techniques appear here as intel feeds are folded in — the ATT&CK chain above stays inferred until then.
Generated by Wavense from the CVE record — an immediate mitigation and the permanent fix.
As an interim measure, implement strong egress filtering on Apache web servers to restrict outbound connections to only necessary and approved backend services. Deploy a Web Application Firewall (WAF) to inspect and block suspicious or malformed URI paths that could exploit this vulnerability. Enhance logging and monitoring for unusual outbound traffic originating from Apache HTTP Server instances.
The permanent resolution is to immediately upgrade Apache HTTP Server to version 2.4.49 or newer. This version contains the necessary fix for the crafted request URI-path vulnerability in mod_proxy. Ensure all affected Apache installations are updated to prevent exploitation of this critical SSRF vulnerability.
An attacker can manipulate a crafted request URI to force the Apache server to forward requests to arbitrary internal or external systems. This can enable information disclosure from internal networks, access to sensitive internal services, or facilitate further attacks by using the trusted server as a proxy, potentially bypassing network security controls.
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