apache2: cve-2016-5387

Handle HTTP_PROXY envirnoment variable.

Signed-off-by: Joe Slater <jslater@windriver.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>

meta-webserver/recipes-httpd/apache2/apache2/cve-2016-5387.patch

@@ -0,0 +1,25 @@
+This patch has been copied from https://www.apache.org/security/asf-httpoxy-response.txt
+as a mitigation of CVE-2016-5387.
+
+Upstream-Status: Backport - fixed in 2.4.24
+
+Signed-off-by: Joe Slater<jslater@windriver.com>
+
+
+--- a/server/util_script.c	(revision 1752426)
++++ b/server/util_script.c	(working copy)
+@@ -186,6 +186,14 @@ AP_DECLARE(void) ap_add_common_vars(request_rec *r
+         else if (!strcasecmp(hdrs[i].key, "Content-length")) {
+             apr_table_addn(e, "CONTENT_LENGTH", hdrs[i].val);
+         }
++        /* HTTP_PROXY collides with a popular envvar used to configure
++         * proxies, don't let clients set/override it.  But, if you must...
++         */
++#ifndef SECURITY_HOLE_PASS_PROXY
++        else if (!strcasecmp(hdrs[i].key, "Proxy")) {
++            ;
++        }
++#endif
+         /*
+          * You really don't want to disable this check, since it leaves you
+          * wide open to CGIs stealing passwords and people viewing them

meta-webserver/recipes-httpd/apache2/apache2_2.4.23.bb

@@ -17,6 +17,7 @@ SRC_URI = "http://www.apache.org/dist/httpd/httpd-${PV}.tar.bz2 \
            file://httpd-2.4.3-fix-race-issue-of-dir-install.patch \
            file://0001-configure-use-pkg-config-for-PCRE-detection.patch \
            file://configure-allow-to-disable-selinux-support.patch \
+           file://cve-2016-5387.patch \
            file://init \
            file://apache2-volatile.conf \
            file://apache2.service \