From 1d98d4db186e708f059336fb9342d0adb6925e85 Mon Sep 17 00:00:00 2001
From: Eric Covener <covener@apache.org>
Date: Tue, 25 Jun 2024 17:29:32 +0000
Subject: [PATCH] Merge r1918606 from trunk:

validate hostname



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1918607 13f79535-47bb-0310-9956-ffa450edef68

Conflict:NA
Reference:https://github.com/apache/httpd/commit/1d98d4db186e708f059336fb9342d0adb6925e85

---
 modules/proxy/proxy_util.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/modules/proxy/proxy_util.c b/modules/proxy/proxy_util.c
index 541e944..3b174ad 100644
--- a/modules/proxy/proxy_util.c
+++ b/modules/proxy/proxy_util.c
@@ -2627,6 +2627,13 @@ ap_proxy_determine_connection(apr_pool_t *p, request_rec *r,
                              apr_pstrcat(p,"URI cannot be parsed: ", *url,
                                          NULL));
     }
+
+    if (!uri->hostname) {
+        return ap_proxyerror(r, HTTP_BAD_REQUEST,
+                             apr_pstrcat(p,"URI has no hostname: ", *url,
+                                         NULL));
+    }
+
     if (!uri->port) {
         uri->port = ap_proxy_port_of_scheme(uri->scheme);
     }
@@ -3992,6 +3999,10 @@ PROXY_DECLARE(int) ap_proxy_create_hdrbrgd(apr_pool_t *p,
 
     /* Compute Host header */
     if (dconf->preserve_host == 0) {
+        if (!uri->hostname) {
+            rc = HTTP_BAD_REQUEST;
+            goto cleanup;
+        }
         if (ap_strchr_c(uri->hostname, ':')) { /* if literal IPv6 address */
             if (uri->port_str && uri->port != DEFAULT_HTTP_PORT) {
                 host = apr_pstrcat(r->pool, "[", uri->hostname, "]:",
-- 
2.33.0