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appletalk: enforce CAP_NET_RAW for raw sockets 

commit 6cc03e8aa36c51f3b26a0d21a3c4ce2809c842ac upstream.

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>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
CVE-2019-17052
Signed-off-by: Kevin F. Haggerty <haggertk@lineageos.org>
Change-Id: I7de244c5a2c55503ffe31b2f384fd02da77b94c3
This commit is contained in:
Ori Nimron 2019-09-20 09:35:46 +02:00 committed by matteo0026
parent e00e138feb
commit 197b53492b
1 changed files with 5 additions and 0 deletions
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5
net/appletalk/ddp.c
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@ -1031,6 +1031,11 @@ 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);
if (!sk)