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mISDN: enforce CAP_NET_RAW for raw sockets 

commit b91ee4aa2a2199ba4d4650706c272985a5a32d80 upstream.

When creating a raw AF_ISDN 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: If153b6f54818550d9d900bc202295a1bfa471ac4
This commit is contained in:
Ori Nimron 2019-09-20 09:35:45 +02:00 committed by matteo0026
parent 197b53492b
commit 8cdd83d123
1 changed files with 2 additions and 0 deletions
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2
drivers/isdn/mISDN/socket.c
View File

@ -764,6 +764,8 @@ base_sock_create(struct net *net, struct socket *sock, int protocol)
if (sock->type != SOCK_RAW)
return -ESOCKTNOSUPPORT;
if (!capable(CAP_NET_RAW))
return -EPERM;
sk = sk_alloc(net, PF_ISDN, GFP_KERNEL, &mISDN_proto);
if (!sk)