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httpd/SOURCES/httpd-2.4.37-CVE-2021-44224...

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import httpd-2.4.37-56.module+el8.8.0+18556+a66138c1.4
2 years ago
diff --git a/include/http_protocol.h b/include/http_protocol.h
index e7abdd9..e1572dc 100644
--- a/include/http_protocol.h
+++ b/include/http_protocol.h
@@ -96,6 +96,13 @@ AP_DECLARE(void) ap_get_mime_headers(request_rec *r);
AP_DECLARE(void) ap_get_mime_headers_core(request_rec *r,
apr_bucket_brigade *bb);
+/**
+ * Run post_read_request hook and validate.
+ * @param r The current request
+ * @return OK or HTTP_...
+ */
+AP_DECLARE(int) ap_post_read_request(request_rec *r);
+
/* Finish up stuff after a request */
/**
diff --git a/modules/http/http_request.c b/modules/http/http_request.c
index 9e7c4db..e873aab 100644
--- a/modules/http/http_request.c
+++ b/modules/http/http_request.c
@@ -681,7 +681,7 @@ static request_rec *internal_internal_redirect(const char *new_uri,
* to do their thing on internal redirects as well. Perhaps this is a
* misnamed function.
*/
- if ((access_status = ap_run_post_read_request(new))) {
+ if ((access_status = ap_post_read_request(new))) {
ap_die(access_status, new);
return NULL;
}
diff --git a/modules/proxy/mod_proxy.c b/modules/proxy/mod_proxy.c
index 6a9ef55..a6df1b8 100644
--- a/modules/proxy/mod_proxy.c
+++ b/modules/proxy/mod_proxy.c
@@ -584,11 +584,12 @@ static int proxy_detect(request_rec *r)
if (conf->req && r->parsed_uri.scheme) {
/* but it might be something vhosted */
- if (!(r->parsed_uri.hostname
- && !strcasecmp(r->parsed_uri.scheme, ap_http_scheme(r))
- && ap_matches_request_vhost(r, r->parsed_uri.hostname,
- (apr_port_t)(r->parsed_uri.port_str ? r->parsed_uri.port
- : ap_default_port(r))))) {
+ if (!r->parsed_uri.hostname
+ || ap_cstr_casecmp(r->parsed_uri.scheme, ap_http_scheme(r)) != 0
+ || !ap_matches_request_vhost(r, r->parsed_uri.hostname,
+ (apr_port_t)(r->parsed_uri.port_str
+ ? r->parsed_uri.port
+ : ap_default_port(r)))) {
r->proxyreq = PROXYREQ_PROXY;
r->uri = r->unparsed_uri;
r->filename = apr_pstrcat(r->pool, "proxy:", r->uri, NULL);
@@ -1750,6 +1751,7 @@ static const char *
struct proxy_alias *new;
char *f = cmd->path;
char *r = NULL;
+ const char *real;
char *word;
apr_table_t *params = apr_table_make(cmd->pool, 5);
const apr_array_header_t *arr;
@@ -1815,6 +1817,10 @@ static const char *
if (r == NULL) {
return "ProxyPass|ProxyPassMatch needs a path when not defined in a location";
}
+ if (!(real = ap_proxy_de_socketfy(cmd->temp_pool, r))) {
+ return "ProxyPass|ProxyPassMatch uses an invalid \"unix:\" URL";
+ }
+
/* if per directory, save away the single alias */
if (cmd->path) {
@@ -1831,7 +1837,7 @@ static const char *
}
new->fake = apr_pstrdup(cmd->pool, f);
- new->real = apr_pstrdup(cmd->pool, ap_proxy_de_socketfy(cmd->pool, r));
+ new->real = apr_pstrdup(cmd->pool, real);
new->flags = flags;
if (use_regex) {
new->regex = ap_pregcomp(cmd->pool, f, AP_REG_EXTENDED);
@@ -2316,6 +2322,7 @@ static const char *add_member(cmd_parms *cmd, void *dummy, const char *arg)
proxy_worker *worker;
char *path = cmd->path;
char *name = NULL;
+ const char *real;
char *word;
apr_table_t *params = apr_table_make(cmd->pool, 5);
const apr_array_header_t *arr;
@@ -2356,6 +2363,9 @@ static const char *add_member(cmd_parms *cmd, void *dummy, const char *arg)
return "BalancerMember must define balancer name when outside <Proxy > section";
if (!name)
return "BalancerMember must define remote proxy server";
+ if (!(real = ap_proxy_de_socketfy(cmd->temp_pool, name))) {
+ return "BalancerMember uses an invalid \"unix:\" URL";
+ }
ap_str_tolower(path); /* lowercase scheme://hostname */
@@ -2368,7 +2378,7 @@ static const char *add_member(cmd_parms *cmd, void *dummy, const char *arg)
}
/* Try to find existing worker */
- worker = ap_proxy_get_worker(cmd->temp_pool, balancer, conf, ap_proxy_de_socketfy(cmd->temp_pool, name));
+ worker = ap_proxy_get_worker(cmd->temp_pool, balancer, conf, real);
if (!worker) {
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, cmd->server, APLOGNO(01147)
"Defining worker '%s' for balancer '%s'",
@@ -2457,7 +2467,13 @@ static const char *
}
}
else {
- worker = ap_proxy_get_worker(cmd->temp_pool, NULL, conf, ap_proxy_de_socketfy(cmd->temp_pool, name));
+ const char *real;
+
+ if (!(real = ap_proxy_de_socketfy(cmd->temp_pool, name))) {
+ return "ProxySet uses an invalid \"unix:\" URL";
+ }
+
+ worker = ap_proxy_get_worker(cmd->temp_pool, NULL, conf, real);
if (!worker) {
if (in_proxy_section) {
err = ap_proxy_define_worker(cmd->pool, &worker, NULL,
@@ -2599,8 +2615,14 @@ static const char *proxysection(cmd_parms *cmd, void *mconfig, const char *arg)
}
}
else {
+ const char *real;
+
+ if (!(real = ap_proxy_de_socketfy(cmd->temp_pool, conf->p))) {
+ return "<Proxy/ProxyMatch > uses an invalid \"unix:\" URL";
+ }
+
worker = ap_proxy_get_worker(cmd->temp_pool, NULL, sconf,
- ap_proxy_de_socketfy(cmd->temp_pool, (char*)conf->p));
+ real);
if (!worker) {
err = ap_proxy_define_worker(cmd->pool, &worker, NULL,
sconf, conf->p, 0);
diff --git a/modules/proxy/mod_proxy.h b/modules/proxy/mod_proxy.h
index fbbd508..dca6f69 100644
--- a/modules/proxy/mod_proxy.h
+++ b/modules/proxy/mod_proxy.h
@@ -713,6 +713,8 @@ typedef __declspec(dllimport) const char *
proxy_dir_conf *, const char *);
#endif
+#define AP_PROXY_WORKER_NO_UDS (1u << 3)
+
/* Connection pool API */
/**
@@ -725,6 +727,24 @@ typedef __declspec(dllimport) const char *
PROXY_DECLARE(char *) ap_proxy_worker_name(apr_pool_t *p,
proxy_worker *worker);
+
+/**
+ * Get the worker from proxy configuration, looking for either PREFIXED or
+ * MATCHED or both types of workers according to given mask
+ * @param p memory pool used for finding worker
+ * @param balancer the balancer that the worker belongs to
+ * @param conf current proxy server configuration
+ * @param url url to find the worker from
+ * @param mask bitmask of AP_PROXY_WORKER_IS_*
+ * @return proxy_worker or NULL if not found
+ */
+PROXY_DECLARE(proxy_worker *) ap_proxy_get_worker_ex(apr_pool_t *p,
+ proxy_balancer *balancer,
+ proxy_server_conf *conf,
+ const char *url,
+ unsigned int mask);
+
+
/**
* Get the worker from proxy configuration
* @param p memory pool used for finding worker
@@ -737,6 +757,8 @@ PROXY_DECLARE(proxy_worker *) ap_proxy_get_worker(apr_pool_t *p,
proxy_balancer *balancer,
proxy_server_conf *conf,
const char *url);
+
+
/**
* Define and Allocate space for the worker to proxy configuration
* @param p memory pool to allocate worker from
diff --git a/modules/proxy/proxy_util.c b/modules/proxy/proxy_util.c
index 032e0c4..3d5b220 100644
--- a/modules/proxy/proxy_util.c
+++ b/modules/proxy/proxy_util.c
@@ -1643,10 +1643,11 @@ PROXY_DECLARE(char *) ap_proxy_worker_name(apr_pool_t *p,
return apr_pstrcat(p, "unix:", worker->s->uds_path, "|", worker->s->name, NULL);
}
-PROXY_DECLARE(proxy_worker *) ap_proxy_get_worker(apr_pool_t *p,
- proxy_balancer *balancer,
- proxy_server_conf *conf,
- const char *url)
+PROXY_DECLARE(proxy_worker *) ap_proxy_get_worker_ex(apr_pool_t *p,
+ proxy_balancer *balancer,
+ proxy_server_conf *conf,
+ const char *url,
+ unsigned int mask)
{
proxy_worker *worker;
proxy_worker *max_worker = NULL;
@@ -1662,7 +1663,12 @@ PROXY_DECLARE(proxy_worker *) ap_proxy_get_worker(apr_pool_t *p,
return NULL;
}
- url = ap_proxy_de_socketfy(p, url);
+ if (!(mask & AP_PROXY_WORKER_NO_UDS)) {
+ url = ap_proxy_de_socketfy(p, url);
+ if (!url) {
+ return NULL;
+ }
+ }
c = ap_strchr_c(url, ':');
if (c == NULL || c[1] != '/' || c[2] != '/' || c[3] == '\0') {
@@ -1727,6 +1733,14 @@ PROXY_DECLARE(proxy_worker *) ap_proxy_get_worker(apr_pool_t *p,
return max_worker;
}
+PROXY_DECLARE(proxy_worker *) ap_proxy_get_worker(apr_pool_t *p,
+ proxy_balancer *balancer,
+ proxy_server_conf *conf,
+ const char *url)
+{
+ return ap_proxy_get_worker_ex(p, balancer, conf, url, 0);
+}
+
/*
* To create a worker from scratch first we define the
* specifics of the worker; this is all local data.
@@ -2134,22 +2148,22 @@ PROXY_DECLARE(int) ap_proxy_pre_request(proxy_worker **worker,
access_status = proxy_run_pre_request(worker, balancer, r, conf, url);
if (access_status == DECLINED && *balancer == NULL) {
- *worker = ap_proxy_get_worker(r->pool, NULL, conf, *url);
+ const int forward = (r->proxyreq == PROXYREQ_PROXY);
+ *worker = ap_proxy_get_worker_ex(r->pool, NULL, conf, *url,
+ forward ? AP_PROXY_WORKER_NO_UDS : 0);
if (*worker) {
ap_log_rerror(APLOG_MARK, APLOG_TRACE2, 0, r,
"%s: found worker %s for %s",
(*worker)->s->scheme, (*worker)->s->name, *url);
- *balancer = NULL;
- if (!fix_uds_filename(r, url)) {
+ if (!forward && !fix_uds_filename(r, url)) {
return HTTP_INTERNAL_SERVER_ERROR;
}
access_status = OK;
}
- else if (r->proxyreq == PROXYREQ_PROXY) {
+ else if (forward) {
if (conf->forward) {
ap_log_rerror(APLOG_MARK, APLOG_TRACE2, 0, r,
"*: found forward proxy worker for %s", *url);
- *balancer = NULL;
*worker = conf->forward;
access_status = OK;
/*
@@ -2163,8 +2177,8 @@ PROXY_DECLARE(int) ap_proxy_pre_request(proxy_worker **worker,
else if (r->proxyreq == PROXYREQ_REVERSE) {
if (conf->reverse) {
ap_log_rerror(APLOG_MARK, APLOG_TRACE2, 0, r,
- "*: using default reverse proxy worker for %s (no keepalive)", *url);
- *balancer = NULL;
+ "*: using default reverse proxy worker for %s "
+ "(no keepalive)", *url);
*worker = conf->reverse;
access_status = OK;
/*
diff --git a/server/protocol.c b/server/protocol.c
index 430d91e..a2aa081 100644
--- a/server/protocol.c
+++ b/server/protocol.c
@@ -1525,7 +1525,7 @@ request_rec *ap_read_request(conn_rec *conn)
/* we may have switched to another server */
apply_server_config(r);
- if ((access_status = ap_run_post_read_request(r))) {
+ if ((access_status = ap_post_read_request(r))) {
goto die;
}
@@ -1582,6 +1582,27 @@ ignore:
return NULL;
}
+AP_DECLARE(int) ap_post_read_request(request_rec *r)
+{
+ int status;
+
+ if ((status = ap_run_post_read_request(r))) {
+ return status;
+ }
+
+ /* Enforce http(s) only scheme for non-forward-proxy requests */
+ if (!r->proxyreq
+ && r->parsed_uri.scheme
+ && (ap_cstr_casecmpn(r->parsed_uri.scheme, "http", 4) != 0
+ || (r->parsed_uri.scheme[4] != '\0'
+ && (apr_tolower(r->parsed_uri.scheme[4]) != 's'
+ || r->parsed_uri.scheme[5] != '\0')))) {
+ return HTTP_BAD_REQUEST;
+ }
+
+ return OK;
+}
+
/* if a request with a body creates a subrequest, remove original request's
* input headers which pertain to the body which has already been read.
* out-of-line helper function for ap_set_sub_req_protocol.