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httpd/httpd-2.4.57-pr37355.patch
Luboš Uhliarik d4b55888c2 Resolves: #2184403 - rebase httpd to 2.4.57 
Resolves: #2177753 - CVE-2023-25690 httpd: HTTP request splitting with
  mod_rewrite and mod_proxy
2023-04-11 14:31:37 +02:00

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diff --git a/modules/proxy/mod_proxy.c b/modules/proxy/mod_proxy.c
index 537c3c2..596320d 100644
--- a/modules/proxy/mod_proxy.c
+++ b/modules/proxy/mod_proxy.c
@@ -1460,11 +1460,20 @@ static int proxy_handler(request_rec *r)
/* handle the scheme */
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01142)
"Trying to run scheme_handler against proxy");
+
+ if (ents[i].creds) {
+ apr_table_set(r->notes, "proxy-basic-creds", ents[i].creds);
+ ap_log_rerror(APLOG_MARK, APLOG_TRACE1, 0, r,
+ "Using proxy auth creds %s", ents[i].creds);
+ }
+
access_status = proxy_run_scheme_handler(r, worker,
conf, url,
ents[i].hostname,
ents[i].port);
+ if (ents[i].creds) apr_table_unset(r->notes, "proxy-basic-creds");
+
/* Did the scheme handler process the request? */
if (access_status != DECLINED) {
const char *cl_a;
@@ -1902,8 +1911,8 @@ static void *merge_proxy_dir_config(apr_pool_t *p, void *basev, void *addv)
return new;
}
-static const char *
- add_proxy(cmd_parms *cmd, void *dummy, const char *f1, const char *r1, int regex)
+static const char *add_proxy(cmd_parms *cmd, void *dummy, const char *f1,
+ const char *r1, const char *creds, int regex)
{
server_rec *s = cmd->server;
proxy_server_conf *conf =
@@ -1961,19 +1970,24 @@ static const char *
new->port = port;
new->regexp = reg;
new->use_regex = regex;
+ if (creds) {
+ new->creds = apr_pstrcat(cmd->pool, "Basic ",
+ ap_pbase64encode(cmd->pool, (char *)creds),
+ NULL);
+ }
return NULL;
}
-static const char *
- add_proxy_noregex(cmd_parms *cmd, void *dummy, const char *f1, const char *r1)
+static const char *add_proxy_noregex(cmd_parms *cmd, void *dummy, const char *f1,
+ const char *r1, const char *creds)
{
- return add_proxy(cmd, dummy, f1, r1, 0);
+ return add_proxy(cmd, dummy, f1, r1, creds, 0);
}
-static const char *
- add_proxy_regex(cmd_parms *cmd, void *dummy, const char *f1, const char *r1)
+static const char *add_proxy_regex(cmd_parms *cmd, void *dummy, const char *f1,
+ const char *r1, const char *creds)
{
- return add_proxy(cmd, dummy, f1, r1, 1);
+ return add_proxy(cmd, dummy, f1, r1, creds, 1);
}
PROXY_DECLARE(const char *) ap_proxy_de_socketfy(apr_pool_t *p, const char *url)
@@ -3012,9 +3026,9 @@ static const command_rec proxy_cmds[] =
"location, in regular expression syntax"),
AP_INIT_FLAG("ProxyRequests", set_proxy_req, NULL, RSRC_CONF,
"on if the true proxy requests should be accepted"),
- AP_INIT_TAKE2("ProxyRemote", add_proxy_noregex, NULL, RSRC_CONF,
+ AP_INIT_TAKE23("ProxyRemote", add_proxy_noregex, NULL, RSRC_CONF,
"a scheme, partial URL or '*' and a proxy server"),
- AP_INIT_TAKE2("ProxyRemoteMatch", add_proxy_regex, NULL, RSRC_CONF,
+ AP_INIT_TAKE23("ProxyRemoteMatch", add_proxy_regex, NULL, RSRC_CONF,
"a regex pattern and a proxy server"),
AP_INIT_FLAG("ProxyPassInterpolateEnv", ap_set_flag_slot_char,
(void*)APR_OFFSETOF(proxy_dir_conf, interpolate_env),
diff --git a/modules/proxy/mod_proxy.h b/modules/proxy/mod_proxy.h
index c51145e..eaf431d 100644
--- a/modules/proxy/mod_proxy.h
+++ b/modules/proxy/mod_proxy.h
@@ -121,6 +121,7 @@ struct proxy_remote {
const char *protocol; /* the scheme used to talk to this proxy */
const char *hostname; /* the hostname of this proxy */
ap_regex_t *regexp; /* compiled regex (if any) for the remote */
+ const char *creds; /* auth credentials (if any) for the proxy */
int use_regex; /* simple boolean. True if we have a regex pattern */
apr_port_t port; /* the port for this proxy */
};
diff --git a/modules/proxy/proxy_util.c b/modules/proxy/proxy_util.c
index caafde0..ea36465 100644
--- a/modules/proxy/proxy_util.c
+++ b/modules/proxy/proxy_util.c
@@ -2708,11 +2708,14 @@ ap_proxy_determine_connection(apr_pool_t *p, request_rec *r,
* So let's make it configurable by env.
* The logic here is the same used in mod_proxy_http.
*/
- proxy_auth = apr_table_get(r->headers_in, "Proxy-Authorization");
+ proxy_auth = apr_table_get(r->notes, "proxy-basic-creds");
+ if (proxy_auth == NULL)
+ proxy_auth = apr_table_get(r->headers_in, "Proxy-Authorization");
+
if (proxy_auth != NULL &&
proxy_auth[0] != '\0' &&
- r->user == NULL && /* we haven't yet authenticated */
- apr_table_get(r->subprocess_env, "Proxy-Chain-Auth")) {
+ (r->user == NULL /* we haven't yet authenticated */
+ || apr_table_get(r->subprocess_env, "Proxy-Chain-Auth"))) {
forward->proxy_auth = apr_pstrdup(conn->pool, proxy_auth);
}
}
@@ -2948,7 +2951,8 @@ static apr_status_t send_http_connect(proxy_conn_rec *backend,
nbytes = apr_snprintf(buffer, sizeof(buffer),
"CONNECT %s:%d HTTP/1.0" CRLF,
forward->target_host, forward->target_port);
- /* Add proxy authorization from the initial request if necessary */
+ /* Add proxy authorization from the configuration, or initial
+ * request if necessary */
if (forward->proxy_auth != NULL) {
nbytes += apr_snprintf(buffer + nbytes, sizeof(buffer) - nbytes,
"Proxy-Authorization: %s" CRLF,
@@ -3909,6 +3913,7 @@ PROXY_DECLARE(int) ap_proxy_create_hdrbrgd(apr_pool_t *p,
int force10 = 0, do_100_continue = 0;
conn_rec *origin = p_conn->connection;
const char *host, *val;
+ const char *creds;
proxy_dir_conf *dconf = ap_get_module_config(r->per_dir_config, &proxy_module);
/*
@@ -4131,6 +4136,11 @@ PROXY_DECLARE(int) ap_proxy_create_hdrbrgd(apr_pool_t *p,
/* run hook to fixup the request we are about to send */
proxy_run_fixups(r);
+ creds = apr_table_get(r->notes, "proxy-basic-creds");
+ if (creds) {
+ apr_table_mergen(r->headers_in, "Proxy-Authorization", creds);
+ }
+
/* We used to send `Host: ` always first, so let's keep it that
* way. No telling which legacy backend is relying on this.
* If proxy_run_fixups() changed the value, use it (though removal
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