From: Ori Nimron <orinimron123@gmail.com>
Date: Fri, 20 Sep 2019 07:35:46 +0000 (+0200)
Subject: appletalk: enforce CAP_NET_RAW for raw sockets
X-Git-Tag: Ubuntu-5.10.0-12.13~4400^2~58^2~3
X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=6cc03e8aa36c51f3b26a0d21a3c4ce2809c842ac;p=mirror_ubuntu-hirsute-kernel.git

appletalk: enforce CAP_NET_RAW for raw sockets

When creating a raw AF_APPLETALK socket, CAP_NET_RAW needs to be checked
first.

Signed-off-by: Ori Nimron <orinimron123@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/appletalk/ddp.c b/net/appletalk/ddp.c
index 4072e9d394d6..b41375d4d295 100644
--- a/net/appletalk/ddp.c
+++ b/net/appletalk/ddp.c
@@ -1023,6 +1023,11 @@ static int atalk_create(struct net *net, struct socket *sock, int protocol,
 	 */
 	if (sock->type != SOCK_RAW && sock->type != SOCK_DGRAM)
 		goto out;
+
+	rc = -EPERM;
+	if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW))
+		goto out;
+
 	rc = -ENOMEM;
 	sk = sk_alloc(net, PF_APPLETALK, GFP_KERNEL, &ddp_proto, kern);
 	if (!sk)