File openssh-7.2p2-secure_unix_sockets_forwarding.patch of Package openssh.4973

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File openssh-7.2p2-secure_unix_sockets_forwarding.patch of Package openssh.4973

# HG changeset patch
# Parent  86736771531fb7e4b9ae01c426594465608e0bc1
Do not allow unix socket when running without privilege separation to prevent
privilege escalation through a socket created with root: ownership.

CVE-2016-10010
bsc#1016368

backported upstream commit b737e4d7433577403a31cff6614f6a1b0b5e22f4

diff --git a/openssh-7.2p2/serverloop.c b/openssh-7.2p2/serverloop.c
--- a/openssh-7.2p2/serverloop.c
+++ b/openssh-7.2p2/serverloop.c
@@ -990,17 +990,17 @@ server_request_direct_streamlocal(void)
 	originator_port = packet_get_int();
 	packet_check_eom();
 
 	debug("server_request_direct_streamlocal: originator %s port %d, target %s",
 	    originator, originator_port, target);
 
 	/* XXX fine grained permissions */
 	if ((options.allow_streamlocal_forwarding & FORWARD_LOCAL) != 0 &&
-	    !no_port_forwarding_flag) {
+	    !no_port_forwarding_flag && use_privsep) {
 		c = channel_connect_to_path(target,
 		    "direct-streamlocal@openssh.com", "direct-streamlocal");
 	} else {
 		logit("refused streamlocal port forward: "
 		    "originator %s port %d, target %s",
 		    originator, originator_port, target);
 	}
 
@@ -1274,17 +1274,17 @@ server_input_global_request(int type, u_
 
 		memset(&fwd, 0, sizeof(fwd));
 		fwd.listen_path = packet_get_string(NULL);
 		debug("server_input_global_request: streamlocal-forward listen path %s",
 		    fwd.listen_path);
 
 		/* check permissions */
 		if ((options.allow_streamlocal_forwarding & FORWARD_REMOTE) == 0
-		    || no_port_forwarding_flag) {
+		    || no_port_forwarding_flag || !use_privsep) {
 			success = 0;
 			packet_send_debug("Server has disabled port forwarding.");
 		} else {
 			/* Start listening on the socket */
 			success = channel_setup_remote_fwd_listener(
 			    &fwd, NULL, &options.fwd_opts);
 		}
 		free(fwd.listen_path);

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File openssh-7.2p2-secure_unix_sockets_forwarding.patch of Package openssh.4973

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